My Chem 1 has been individually testing for various unknowns. I've received a Clear-white christal to test (it looked very slimier to a moist salt). When I preformed a flame test I observed a very strong orange color. I've narrowed my cation choices down to CaCl2 (Calcium Chloride) or NaCl (sodium chloride). Since it was a clear-white substance I only tested for all the elements in the first two columns of the periodic table. When I tested for Barium by adding drops of potassium dichromate to my unknown solution a yellow precipitate was formed indicating that it was positive. When I tested for Calcium by adding a few drops of ammonium oxalate to my unknown solution a white precipitate was formed indicating that it was positive. Then I tested for Lithium (negative), Magnesium (positive), Potassium (negative), Sodium (positive), Strontium (positive) and Zinc (negative). How is that possible to have more than one positive? I don't know. I thoroughly cleaned all my equipment again and again, checked the testing chemicals (double and triple checked), I preformed these test twice so far getting the same results each time.
Chemistry unknowns testing?
- Thread starter ishida
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