An unknown that might contain any of the seven ions studied in this experiment h

Question

An unknown that might contain any of the seven ions studied in this experiment has the following properties, based upon an experiment performed by Alex B.: a) On addition of 1 M HCl, bubbles form. b) When 0.1 M BaCl2 is added to the acidified unknown, a white precipitate results. c) When 0.1 M AgNO3 is added to the unknown, a clear solution results Classify the following ions as present, absent, or undetermined. (input the whole word) Copper Blank 1 Aluminium Blank 2 Sulfate Blank 3 Phosphate Blank 4 Thiocyanate Blank 5 Chloride Blank 6 Carbonate

Explanation / Answer

Copper:undetermined (requires NH3)
Aluminum:undetermined (requires NH3)
Sulfate:present (b) (uses BaCl2 and a white precipitate forms)
Phosphate:undetermined (requires HNO3)
Thiocyanate:undetermined (Requires HC2H3O2)
Chloride:absent (c) (When added with AgNO3 a white precipitate is supposed to form if chloride is present it did not precipitate thus being absent)
Carbonate:present (a) (When added with HCl bubbles form)

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