While preparing crystals of Mohr's salt, dil $\mathrm{H}_2 \mathrm{SO}_4$ is added to a mixture of ferrous sulphate and ammonium sulphate, before dissolving this mixture in water, dil $\mathrm{H}_2 \mathrm{SO}_4$ is added here to :

Question

While preparing crystals of Mohr's salt, dil $\mathrm{H}_2 \mathrm{SO}_4$ is added to a mixture of ferrous sulphate and ammonium sulphate, before dissolving this mixture in water, dil $\mathrm{H}_2 \mathrm{SO}_4$ is added here to :, prevent the hydrolysis of ferrous sulphate, prevent the hydrolysis of ammonium sulphate, make the medium strongly acidic, increase the rate of formation of crystals

MARKS App · Accepted Answer

Fe + 2 ions undergoes hydrolysis, therefore while preparing aqueous solution of ferrous sulphate and ammonium sulphate in water dilute sulphuric acid is added to prevent hydrolysis of ferrous sulphate.

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