What Happens When Ferrous Sulphate Solution Is Added to Sodium Hydroxide Solution

When ferrous sulfate reacts with sodium hydroxide, dirty green gelatinous ppt. of ferrous hydroxide is formed along with colorless sodium sulfate.

When ferrous sulphate solution is added to the solution of sodium hydroxide then give the correct observation related to it?

Answer: When NaOH is added to ferrous ammonium sulphate solution and warmed, both ferrous ion and ammonium ion separate and exhibit their individual properties. A green precipitate of Fe(OH)2 is formed and the smell of NH3 gas from (NH4)+ ion is observed. Hence, it is an example of the formation of a double salt.

What happens when excess of sodium hydroxide is added to zinc sulphate?

When excess sodium hydroxide is added to a solution of zinc sulphate the precipitate of zinc hydroxide which is formed reacts with sodium hydroxide. Thus, when white precipitate of zinc hydroxide reacts with sodium hydroxide a soluble salt of sodium and zinc (Na2ZnO2) is formed.