What happens when potassium ferrocyanide solution is added to a ferric salt solution?

Write with balanced equation what happens when potassium iodide solution is added to an aqueous solution of copper sulphate.

What happens when Potassium iodide solution is added to an aqueous solution of copper sulphate. Give equation.

What happens when barium chloride solution is added to potassium sulphate solution?

What happens when potassium iodide is added to CuSO_4 solution ?

What happens when bromine solution in water is added to aniline ?

What happens when bromine solution in water is added to phenol ?