Which compound in solution produces a precipitate with aqueous ammonia that does not dissolve when an excess of ammonia is added?When aqueous sodium hydroxide is added dropwise until in excess to an unknown salt solution, a green precipitate is formed and is insoluble in excess aqueous sodium hydroxide. The precipitate turns brown slowly.Which of the following is the unknown salt?
1 point
A copper(II) sulfate
B iron(II) sulfate
C iron(III) sulfate
D lead(II) sulfate
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Answer:
- copper
2. iron
3. sulfate
4. lead
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