Question

What happens if naoh is added to ferrous ammonium sulphate solution and warmed?

Answer 1

What happens when Sodium hydroxide solution is added to Ferrous Sulphate solution? Write with observation and balanced chemical equation

You will get a colourless solution of Na2SO4 with a pale green precipitate of Iron(II) hydroxide. It will be a double displacement reaction in the following way:

FeSO4 (aq) -> Fe2+ + SO4 2-

2NaOH (aq) -> 2Na+ + 2OH-

Now the ions will get exchanged the -ve radical from 2 moles of NaOH ie 2 OH-

will combine with Fe2+. Similarly 2 moles of +ve radical Na+ will combine with SO4 2- .

Fe2+ + 2 OH- -> Fe(OH)2 (S)

2Na+ + SO4 2- -> Na2SO4 (aq)

Answer 2

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.