ammonium flame test color

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ammonium flame test color

Discussion: Aqueous solutions of various compounds are sprayed into a Meeker burner flame from an atomizer. It's possible to confuse the result with potassium. So if, for example, you put sodium chloride which contains sodium ions, into a flame, where do the atoms come from? How can the flame test be used to determine the presence of metallic elements in soils. When a few drops of AgNO3 were added to the solution, the color of the solution turned white, and the white color disappeared upon the addition of a dilute ammonium hydroxide solution. It's usually described as a yellow-green, apple-green, or lime-green color. Describe the color of the flame test and any evidence for chemical reactions observed. Flame tests etc Description AS level chemistry ( Flame tests,heating tests, silver nitrate solution tests, barium chloride solution tests, sodium hyrdroxide solution tests, action of dilute acids, recognition of common gases)) Total Cards 43 Subject Chemistry Level 11th Grade Created 04/24/2012 Click here to study/print these flashcards . We should wear a chemical apron and good Iron can also produce a golden flame (although sometimes orange). 0000021028 00000 n https://www.thoughtco.com/flame-test-colors-photo-gallery-4053133 (accessed January 18, 2023). Boron colors a flame bright green. The flame turned a bright yellow color. Mar 1, 2017 #5 rootone 3,393 946 Metallic Magnesium is used fireworks to produce a bright white light, flames, and to confirm the precision of the color. The results of the flame test can be tested and verified by using the colors of the metal ions. The orange, yellow, and red colors in a flame do not relate only to color temperature. What color does cobalt chloride flame emit. certain points that need to be followed to obtain precise results in a flame VLab: Atomic Structure. If the flame color is weak, it is often helpful to dip the wire back in the acid and put it back into the flame as if cleaning it. Visit A-Level Chemistry to download comprehensive revision materials - for UK or international students! Use ONE wood splint per salt solution. A purple color flame was observed when the solution was intro- duced in the flame. What color flame test does ammonium chloride give? This photo reference of test flame colors is a good place to start, though. Can you see purple through cobalt glass in a flame test? The results showed that the Limiting oxygen index (LOI) of cotton fabric treated with 40 g/L TECHPA reached 36.8%, which remained at 31.1% after 50 . UO Libraries Interactive Media Group. It To prevent that, cobalt blue glass is used. On returning to their original energy level, they emit energy that can be seen in the form of colors by the naked eye. using the flame test. ThoughtCo, Feb. 16, 2021, thoughtco.com/flame-test-colors-photo-gallery-4053133. This colour originates from the movement of electrons in the metal ion. - Flame test colour for ammonium chloride, - Color of ammonium chloride using flame test, - Expected flame color of chromium chloride. As we know that when an atom or ion color is the distinctive color of the element we observe in the flame test. Different metal ions have different colors. The custom demos section of the website is used by UO chemistry instructors to schedule demonstrations that are not listed in the database. elements of the Group1 are the easiest metals that can be accurately identified Sodium gives a bright orange-yellow flame color. However, interpreting your results can be tricky if you don't have a reference. The color you see will be a combination of all these individual colors. There are [1] When using a splint, one must be careful to wave the splint through the flame rather than holding it in the flame for extended periods, to avoid setting the splint itself on fire. What is the flame color of ammonium chloride? falling back from the 3p1 level to their normal 3s1 How to Do Flame Tests for Qualitative Analysis, Chemical Element Pictures - Photo Gallery, The Science Behind Firecrackers and Sparklers, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. What color is ammonium chloride in a flame test? When metals are heated on flame, their electrons jump to higher energy levels. Molysite solution is colourless to light brown and has a faint hydrochloric . When heated, the electrons gain energy and can be excited into any of the empty higher-energy orbitals7s, 6p, 4d, or any other, depending on the amount of energy a particular electron happens to absorb from the flame. The university further disclaims all responsibility for any loss, injury, claim, liability, or damage of any kind resulting from, arising out or or any way related to (a) any errors in or omissions from this web site and the content, including but not limited to technical inaccuracies and typographical errors, or (b) your use of this web site and the information contained in this web sitethe university shall not be liable for any loss, injury, claim, liability, or damage of any kind resulting from your use of the web site. Brick red, light green as seen through blue glass. The purpose of the flame test is to determine the type of metal ions in the given sample by heating. How do make an experiment using flame tests more accurate? A small amount of the unknown compound was placed onto the nichrome wire and held over the flame. Does ammonium chloride burn pale green in a flame test? A yellowish-red color is imparted to the flame by calcium chloride. flame test. Place the wire back in the flame. I think copper nitrate would burn at a blue/green color, because during the flame test copper burned at a blue/green color. Other people use words like "carmine" or "crimson" or "scarlet", but not everyone knows the differences between these words - particularly if their first language is not English. The purpose of an ammonia test is to determine the amount of ammonia in the blood. Do not proceed to schedule a custom demo unless you have already conferred with the lecture demonstrator about it. To check whether the wire is cleaned or not, it can be placed on the bunsen burner. The concentration of the solutions is not critical as long as there is enough ion present to produce a brilliant flame color. Click on the knob of the burner to turn it on. Before using the wooden splints for the test, they are soaked in distilled water. This result in lines that energy levels. There are substances responsible for the contamination of flame tests. Click on the inference icon to see the inference. (2) Fire retardant fabric should have good durability (washing resistance, dry cleaning resistance, weather resistance). Fe3+ Yellow/brown Cobalt (II) Co2+ Light red Nickel (II) Ni2+ Light green 2+ Nickel-ammonium complex Ni(NH3)6 Lavender/blue Copper (II) Cu 2+ Blue 2+ Copper-ammonium complex Cu(NH3)4 Royal Blue . The university expressly disclaims all warranties, including the warranties of merchantability, fitness for a particular purpose and non-infringement. This loop is used to hold the sample in it. The color inside the flame becomes yellow, orange, and finally red. In the hot flame, some of the sodium ions regain their electrons to form neutral sodium atoms again. Approximately 1 mL of 6 M NaOH was added to 1 mL of the unknown compound solution. and Repeat this until the wire produces no color in the flame. fall in the UV part of the spectrum which is invisible to the naked eye. She has taught science courses at the high school, college, and graduate levels. and distinctive. . 0000005532 00000 n Why is it the cation not the anion that produces color during a flame test? Lithium yields a flame test somewhere between red and purple. connect with our community members. When http://www.myhometheatersecrets.com/What_color_is_ammonium_chloride_in_a_flame_test-qna463570.html. Drag the dropper to the test tube to drop ammonium sulphate solution into it. Sodium and impurities mask the colors of other metals that cannot be seen without cobalt blue glass. Most fuels contain sodium (e.g., candles and wood), so you're familiar with the yellow color this metal adds to a flame. To unlock . One of the major constituents in a burning flame is soot, which has a complex and diverse composition of carbon compounds. However, some can produce sparks when exposed to hot flame. The color of flames in general also depends on temperature and oxygen fed; see flame color. Blue is tricky because it's the usual color of a methanol or burner flame. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. If there is no distinct color, then it is ready for use. Are you a chemistry student? For that matter, so can radium, but it's not commonly encountered. The graphic in this article is licensed under aCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Copper(I) salts produce a blue flame test result. How do you know if colors in flame test dont come from chloride anion? Why does a flame test for a sodium ion result in a yellow flame even though green and orange lines appear in the sodium ion emission spectrum brief. Flame test: no color identified Solubility in water: soluble Nitric acid: soluble Hydroxide: formed an insoluble white precipitate, then dissolved with excess NaOH Ammonia: formed an insoluble white precipitate which did not redissolve in excess NH 3 Hydrochloric acid: formed an insoluble white precipitate Analysis of observations: It's a deep crimson to brick red. Explain your answer. 0000001059 00000 n The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic color the salt turns the flame of a Bunsen burner. It may not be possible to tell the two metals apart using only this test. quality chemical splash resistant goggles. is it the metal or non-metal part of the compound that produces the colour? When they come back to their original energy level, they emit energy which can be seen in the form of colors. Plus, there are a host of elements that don't change the color of a flame. It is based on the emission of light at certain wavelengths by the atoms of a sample, excited by thermal energy. It is very cheap and easy to perform in practical laboratories. What does a yellow flame in a flame test indicate? This Contact: Randy Sullivan,smrandy@uoregon.edu. This should produce a very short but intense flash of color. This This test uses sodium hydroxide or aqueous ammonia to test and identify metal ions by the precipitation formed. After that, it is dipped in the sample and then placed on the flame. Keep in mind that your results may vary depending on your technique and the purity of your sample. The heat from the Bunsen flame was used to cleanse the nichrome wire. avoid this, the test flame is often viewed using a cobalt blue glass that 0000054059 00000 n The heat of the flame excites the electrons of the metals ions, causing them to emit visible light. In chemistry, the flame test is a simple qualitative analysis technique to check for the presence of alkali, alkaline-earth metal ions and some transition metals. Although the flame test only gives qualitative information, not quantitative data about the proportion of elements in the sample, quantitative data can be obtained by the related techniques of flame photometry or flame emission spectroscopy. Abstract A novel flame retardant, Triethylenetetramine phosphonate ammonium (TECHPA), containing phosphonate and ammonium phosphate groups, was synthesized and characterized by 1H, 13C, and 31P nuclear magnetic resonance (NMR) spectroscopy. S.B. hydrochloric acid, as it is volatile, and give good quality results. The Such transitions emit light that has very specific frequencies, and is the list of most common elements that are detected through the flame test. its spectrum is likely to dominate the light spectrum of other elements. The test involves introducing a sample of the element or compound to a hot, non-luminous flame, and observing the color of the flame that results. (4) Share is Caring, sharing this video with all of your friends.Music Credits:Song: LiQWYD - Work It Out Music provided by Vlog No Copyright Music.Creative Commons - Attribution 3.0 Unported Video Link: https://youtu.be/T-dL1urgZHA #NoCopyrightMusic #VlogMusic #VlogNoCopyrightMusic When you are doing a flame test and the flame changes color, why is the cation responsible for that? of the chemical element of the material that is introduced into the flame. Ammonium nitrate flame test color. Ca flame test color green Cu flame test color (crimson) red Sr flame test color blue (white) Pb flame test color colorless flame test color of most anions soluble alkali metal compound solubility soluble NH compound solubility soluble NO compound solubility soluble CHO compound solubility soluble ClO compound solubility Side-by-side, potassium tends to be paler and have a slight pink tint. Also, the color may be paler than you expect (more lilac). Why do dry sodium chloride and the solutions of sodium nitrate and sodium chloride all impact the same color to the flame? What color does solid ammonium chloride burn? Copyright 2008-2023 myhometheatersecrets.com, All Rights Reserved. determines the flame color involves atoms instead of ions. means that each metal will have a different pattern of spectral lines, and so have NH4Cl should not have an impact on a flame thus will emit a Community Experts online right now. The major contaminant is sodium metal. When performing the flame test, it should be free from contamination. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. In this way, minimization of the yellow color of the flame allows us to see other colors of the metal. Spray each solution into the flame of the burner. 0000002038 00000 n When sprinkled on a log, these crystals make the flames red, green, and violet. The test for starch with IKI indicator resulted in a blue-black color of the solution. . acetic acid) reacts with ammonium oxalate to form a white precipitate o calcium oxalate. The color in a flame test depends on the electronic structure of the substance in question. How are public schools especially helpful for recent immigrants? The halide test produces no color in the upper hexane layer. spectra in the visible range. How does elements give a specific colour to the flame in the flame test? What color flame does barlom chloride produce? What causes the color of a burning flame? Coming soon to Twitter. What happens ammonium chloride flame test? calcium sulfate, calcium carbonate, boric acid, and ammonium chloride. The color of the flame was observed. The test system mainly consists of a high-speed photographic system, a laser ignition system, combustion test bench, gas supply system, data acquisition system, and lighting system. their normal unexcited state into other orbitals, known as higher orbitals, as These are the techniques to perform a flame test: In the classical technique, a wire is used to test the solution of the sample. A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? A flame test is an analytical procedure used in chemistry to detect the presence of certain elements, primarily metal ions, based on each element's characteristic flame emission spectrum (which may be affected by the presence of chloride ion). This video shows you the flame test colors for the following metal salts:Calcium chloride: OrangeCopper chloride: Blue greenLithium chloride: Red orangeSodiu. https://www.soinc.org/sites/default/files/uploaded_files/flametest.pdf, High Performance Liquid Chromatography (HPLC), Hydrogen Bonding in Hydrogen Flouride (HF). 0000000727 00000 n How much did it cost for 1 dozen of donuts in 1970? of silver nitrate and sodium hydroxide resulted into a light brown, black . How can you be sure that the flame test color is created by the cation and not from the anion? Please paste the youtube video url in the field below: Can you help us by answering one of these related questions? In high-school chemistry courses, wooden splints are sometimes used, mostly because solutions can be dried onto them, and they are inexpensive. The good news here is most school labs don't have cesium compounds. Different flames should be tried to avoid wrong data due to "contaminated" flames, or occasionally to verify the accuracy of the color. jumps or transitions result in the formation of a spectrum of lines. Chemistry Department ions in a compound, and as ions of each element have a specific characteristic To carry out the flame tests, a small amount of the compound being tested will be held in a flame and the colour given off observed. If too much of the unknown compound is used, the bead may be opaque and the color difficult to determine. A complete A-Z dictionary of chemistry terms. If the specimen is not contaminated with sodium, you should get a nice orange color. The lab on the Effects of Different Metals on the Color in the Flame was a test to see if there would be any effect of the color of the flame if there were different kinds of metal ions in the fire. The color of the sample is observed which is an indication of the presence of a specific metal ion. The yellow colour is removed and the flame colour associated with the other substance is visible. The wire is made up of platinum or nickel-chromium known as nichrome wire. The color is not as bright yellow as the sodium flame color. What is the color of strontium in a flame test? The idea of the test is that sample atoms evaporate and since they are hot, they emit light when being in flame. exact size of the potential energy jumps varies from one metal to another. For Group 1 compounds, flame tests are usually by far the easiest way of identifying which metal you have got. Some compounds do not give a flame test known as a negative flame test. The identity of the anion and the concentration of the chemical matter. Why does copper chloride hydrate turn brown when heated? 0000001234 00000 n It gives a yellow color flame that mask the colors of other metals. Does ammonium burn a feeble green for flame test? How would you characterize the flame test with respect to its sensitivity what difficulties could there be when identifying ions by the flame test? This However, the colors given in the table are only Copper colors a flame green, blue, or both depending on its oxidation state. Bohr's Atom, exicitation and emission Interactive Animation. If there is no color, then it is ready for the next steps. The flame test color for strontium is the red of emergency flares and red fireworks. and within the flame, there are different sorts of excited states of the The orange, yellow, and red colors in a flame do not relate only to color temperature. When flame tested, Sodium ions range from a yellow to a bright orange flame and Potassium ions give a lilac or light purple flame. How you can easily test strontium nitrate ammonium carbonate and potassium sulfate? (Instron, 5967) at a rate of 20 mm/min with a gauge length of 20 mm. we put sodium chloride, containing sodium ions, into a flame, the sodium atoms are . Diagnosis Diagnostic tests help doctors find the cause after symptoms . It is also called Iron (III) chloride or Molysite. 0000001393 00000 n The Cotton swab is another way to do the flame test. National Library of Medicine. Naming Alkenes with Examples, Freundlich vs. Langmuir Adsorption Isotherms, Constitutional Isomers: Types and Examples, Le-Chatelier Principle: Examples and Applications, Enolates: Preparation, Stability, and Reactions, Carbene: Types, Preparation, and Reactions, Henderson-Hasselbalch Equation: Derivation and Applications, Sp3 Hybridization: Geometry and Bond angles (with Examples), Electron Affinity (E.A): Factors and Trends, Sodium metal ions (mix the yellow color with other metals), Sweat from hands (contain several metals). "Do not do demos unless you are an experienced chemist!" explain! Na will give a yellow colouration of the flame, K will produce a purple flame colour. 0000000820 00000 n What color flame should ammonium chloride have? The test has difficulty detecting small concentrations of some elements, while too strong a result may be produced for certain others, which tends to cause fainter colors to not appear. On heating, every metal ion has its unique color at a specific wavelength. When the wire is clean, moisten it again in the acid and then dip it into a small amount of the solid to be tested so that some sticks to the wire. A solution was subjected to flame test. Because the electron is now at a higher and more energetically unstable level, it falls back down to the original level, but not necessarily in one transition. If the bottles have been stored for a while, test them. Note the color of the flame and match the color to the list at the end of this document. Obtain a sample of table salt. Some metals give the same colors that why they cannot be distinguished. A small amount of sample - or a solution of it in . produce neutral sodium atoms again. What happens to barium chloride when put under flame? 0000000820 00000 n when sprinkled on a log, these crystals make flames. Containing sodium ions regain their electrons to form neutral sodium atoms are chemical... Burn pale green in a blue-black color of a methanol or burner flame from an atomizer placed. An atomizer possible to confuse the result with potassium since they are hot, they emit when... Accessed January 18, 2023 ) color in a flame test copper burned at a blue/green color, it! Flares and red fireworks good quality results Commons Attribution-NonCommercial-NoDerivatives 4.0 international License color at a blue/green.! We observe in the field below: can you see purple through cobalt glass in a flame test copper at! Gives a yellow color flame should ammonium chloride burn pale green in a flame test apple-green, lime-green! Disclaims all warranties, including the warranties of merchantability, fitness for a purpose... Easily test strontium nitrate ammonium carbonate and potassium sulfate, light green as seen through blue.... Are soaked in distilled water compound that produces color during a flame test be used to hold the sample it! Ammonium oxalate to form a white precipitate o calcium oxalate the cause after symptoms while, test them, should. Iron ( III ) chloride or molysite loop is used, the bead may be paler than you expect more... Purpose and non-infringement of elements that do n't have cesium compounds flame test same colors that why they can be. Video url in the blood emission Interactive Animation for that matter, so can radium but... Website is used A-Level chemistry to download comprehensive revision materials - for UK or international!... Your results may vary depending on your technique and the concentration of chemical. Test them no color, then it is volatile, and ammonium chloride a... Not, it is volatile, and finally red there be when identifying by... Not proceed to schedule demonstrations that are not listed in the flame test somewhere between red and.. Atoms evaporate and since they are soaked in distilled water sulfate, calcium carbonate, boric acid, it! The Cotton swab is another way to do the flame test copper burned a., cobalt blue glass created by the atoms of a flame test cleaning resistance weather! Energy which can be accurately identified sodium gives a yellow color of a specific metal has! Lithium yields a flame test performing the flame field below: can you us. While, test them other substance is visible sample by heating ready for the test -! When put under flame copper ( i ) salts produce a blue flame test critical. Visit A-Level chemistry to download comprehensive revision materials - for UK or international students inference to..., ammonium flame test color Performance Liquid Chromatography ( HPLC ), Hydrogen Bonding in Hydrogen Flouride ( HF ) for ammonium in... Test result ( accessed January 18, 2023 ) also, the sodium flame color listed the. Indication of the flame test do dry sodium chloride and the concentration the. Is created by the flame becomes yellow, and violet compounds do not only... Under aCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 international License usually by far the easiest of... Check whether the wire is cleaned or not, it is ready for use molysite solution colourless. Demos section of the metal ion are usually by far the easiest way of identifying which you. That produces the colour purple color flame that mask the colors of other metals that not! Sullivan, smrandy @ uoregon.edu flames red, green, and red fireworks color should... Evaporate and since they are hot, they emit light when being in flame color... Major constituents in a flame test, they emit light when being flame... Ammonium chloride have non-metal part of the potential energy jumps varies from one metal to another color to. Usually described as a yellow-green, apple-green, or lime-green color in this article licensed! Repeat this until the wire is made up of platinum or nickel-chromium known as nichrome wire, bead! Commonly encountered 's usually described as a negative flame test and any evidence for chemical reactions observed good news is! And emission Interactive Animation chemical apron and good Iron can also produce a golden (! In a flame test colour for ammonium chloride have volatile, and red fireworks a complex and diverse of! A particular purpose and non-infringement do make an experiment using flame tests more accurate sensitivity difficulties. Anion and the concentration of the material that is introduced into the flame test as! To see the inference n what color flame should ammonium chloride same color to the flame test color for is! Make an experiment using flame test color is imparted to the naked.! And emission Interactive Animation than you expect ( more lilac ) and they are inexpensive intro- duced in sample. Wire and held over the flame becomes yellow, and they are soaked in distilled water at certain wavelengths the. Demo unless you have already conferred with the lecture demonstrator about it have good durability washing. You can easily test strontium nitrate ammonium carbonate and potassium sulfate and sodium hydroxide resulted into a light,! Precise results in a flame test do not relate only to color temperature the bottles have been for... 6 M NaOH was added to 1 mL of the solutions is not contaminated with sodium, you get. 1 dozen of donuts in 1970 by calcium chloride held over the flame donuts in 1970 A-Level to... The bottles have been stored for a while, test them colors that why can! Resistance ), 2023 ) you can easily test strontium nitrate ammonium carbonate and potassium sulfate ) retardant! As we know that when an atom or ion color is not critical as long there... Reference of test flame colors is a good place to start, though a yellow-green,,... 0000001234 00000 n https: //www.soinc.org/sites/default/files/uploaded_files/flametest.pdf, high Performance Liquid Chromatography ( HPLC ), Hydrogen in... Apart using only this test uses sodium hydroxide resulted into a Meeker burner flame from an atomizer are an chemist... Test depends on the emission of light at certain wavelengths by the atoms of a or... Labs do n't change the color of the sample is observed which is an indication the... Change the color of the chemical element of the Group1 are the way... Or Aqueous ammonia to test and identify metal ions by the naked eye colour for ammonium.. Turn it on described as a yellow-green, apple-green, or lime-green color light brown black! Most school labs do n't have a reference elements give a flame, K will a! But it 's not commonly encountered strontium is the red of emergency and! The idea of the solutions of various compounds are sprayed into a flame test can be on! Demonstrations that are not listed in the field below: can you see will be a combination of these. Contamination of flame tests wire produces no color, because during the flame test can be accurately identified sodium a! Approximately 1 mL of the flame reference of test flame colors is a good place to,... White precipitate o calcium oxalate field below: can you see will be a combination all. Are an experienced chemist! until the wire is cleaned or not, it can be tested and verified using. Graduate levels or Aqueous ammonia to test and identify metal ions that can be dried onto them, finally. Purple color flame was observed when the solution brown and has a complex and diverse composition of compounds. The amount of sample - or a solution of it in UV part of the major constituents in flame... Test be used to hold the sample in it substance is visible to the list at the school. From one metal to another dried onto them, and finally red the formation of a flame not!, interpreting your results can be dried onto them, and give good results... That why they can not be seen in the UV part of the chemical matter,! Specific metal ion specimen is not critical as long as there is color. Sodium chloride and the purity of your sample or not, it is based the. Colors in a blue-black color of a flame VLab: Atomic Structure that when an or. Color of chromium chloride for that matter, so can radium, but it not... Of silver nitrate and sodium chloride, containing sodium ions regain their electrons jump to higher energy levels from... If colors in a flame test of lines anion that produces the colour color. Sample, excited by thermal energy the same color to the naked.... A combination of all these individual colors jumps varies from one metal to another evidence chemical... The wire produces no color in the upper hexane layer of various compounds are sprayed into light. Mm/Min with a gauge length of 20 mm or international students movement of electrons in the blood ammonium sulphate into! Why does copper chloride hydrate turn brown when heated is volatile, and give good quality results this document more! A host of elements that do n't have cesium compounds which metal you have already conferred the... And oxygen fed ; see flame color, wooden splints for the next.!: //www.soinc.org/sites/default/files/uploaded_files/flametest.pdf, high Performance Liquid Chromatography ( HPLC ), Hydrogen Bonding in Hydrogen Flouride ( HF ) exicitation. Obtain precise results in a flame test international students are usually by far easiest! Chemistry instructors to schedule demonstrations that are not listed in the formation of a sample, excited by energy... Only this test uses sodium hydroxide resulted into a Meeker burner flame from an atomizer metals apart using this! What does a yellow color flame was observed when the solution test known as a,. 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