O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2017 · Q51 Mark
An aqueous solution of zinc chloride is tested by adding reagents. Which observation is correct? reagent added to zinc chloride (aq) observations A acidified aqueous barium nitrate forms a white precipitate B aqueous ammonia forms a white precipitate, soluble in excess of the reagent C aqueous sodium hydroxide forms a white precipitate, insoluble in excess of the reagent D powdered copper forms a grey precipitate
Aacidified aqueous barium nitrate forms a white precipitate
Baqueous ammonia forms a white precipitate, soluble in excess of the reagent
Caqueous sodium hydroxide forms a white precipitate, insoluble in excess of the reagent
Dpowdered copper forms a grey precipitate
✓ Correct answer
B: aqueous ammonia forms a white precipitate, soluble in excess of the reagent
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