Question

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​

Answer 1

Answer:

1. copper

2. iron

3. sulfate

4. lead