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Questions
Distinguish between the given pair of compounds using the test given within bracket:
A lead salt and a zinc salt (using excess ammonium hydroxide)
Distinguish between the following pair of compounds using the test given within bracket.
A lead salt and a zinc salt (using excess ammonium hydroxide)
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Solution
| Lead salt | Zinc salt | |
| 1. | On adding ammonium hydroxide, a white precipitate of lead hydroxide, Pb(OH)2, is formed. | On adding ammonium hydroxide, a white gelatinous precipitate of zinc hydroxide, Zn(OH)2, is formed. |
| 2. | The precipitate does not dissolve in excess ammonium hydroxide. | The precipitate dissolves in excess ammonium hydroxide, forming a clear solution. |
Hence, lead salt remains insoluble, while zinc salt dissolves in excess ammonium hydroxide.
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