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chem lab 32
Course: CHEM 1212L, Spring 2010School: UGA
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Word Count: 171
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identify 1. whether unknown is a liquid or a solid 2. solubility in water a. aluminum=soluble b. sodium hydrogen carbonate=soluble c. barium chloride=soluble d. ammonia=soluble e. formic acid=soluble f. sodium hydroxide=soluble g. hydrochloric acid=soluble h. iron (iii) chloride=soluble i. ethanol=soluble j. hexane=insoluble k. urea=soluble l. potassium sulfate=soluble 3. pH determination (possibly eliminate...
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identify 1. whether unknown is a liquid or a solid 2. solubility in water a. aluminum=soluble b. sodium hydrogen carbonate=soluble c. barium chloride=soluble d. ammonia=soluble e. formic acid=soluble f. sodium hydroxide=soluble g. hydrochloric acid=soluble h. iron (iii) chloride=soluble i. ethanol=soluble j. hexane=insoluble k. urea=soluble l. potassium sulfate=soluble 3. pH determination (possibly eliminate sodium hydroxide and ammonia) 4. mix the unknown with Barium Chlorideif it precipitates, the unknown is potassium sulfate 5. add sodium hydroxide to unknownif precipitates it it could be iron chloride or aluminum 6. sodium hydrogen carbonate bubbles with addition HCl, doesnt bubble=barium chloride 7. test conductivity to see if unknown is ionic or covalent a. aluminum=conduct b. sodium hydrogen carbonate=conduct c. barium chloride=conduct d. ammonia=no e. formic acid=no f. sodium hydroxide=conduct g. hydrochloric acid=conduct h. iron (iii) chloride=conduct i. ethanol-no j. hexane-dont need to do k. urea-no l. potassium sulfate-conduct 8. barium burns green; potassium sulfate burns violet; ethanol burns blue 9.
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