What colour is the participate formed when sodium hydroxide is added to copper (II) sulphate?

Question

Also, what colour is the participate formed when sodium hydroxide solution is added to iron (III) chloride solution?

And What colour is the participate formed when sodium hydroxide solution is added to Zinc Chloride solution?

Answer 1

I think it's blue.

Answer 2

The result is a blue precipitate.

Copper(II) sulphate solution is added to sodium hydroxide solution, the precipitate is blue and is gelatinous, and is probably Cu(OH)2. Addition of ammonia to a boiling solution of copper(II) sulphate until the green precipitate becomes blue, followed by washing, and then warming with sodium hydroxide solution will give crystalline Cu(OH)2.