Question

Make a solution of the unknown substance: add sodium hydroxide solution or ammonium hydroxide solution, make observations and give your deduction. Warming the mixture may be needed. Choose from substances containing Ca2+, Cu2+, Fe2+, Fe3+, Pb2+, Zn2+, NH4+. Supply a solution of a dilute acid and alkali. Determine which is acidic and which is basic, giving two tests for each.


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Answer 1

Explanation:

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