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.
While preparing crystals of Mohr's salt, dil H2SO4 is added to a mixture of ferrous sulphate and ammonium sulphate, before dissolving this mixture in water, dil H2SO4 is added here to :
Held on 5 Apr 2024 · Verified 6 Jul 2026.
prevent the hydrolysis of ferrous sulphate
prevent the hydrolysis of ammonium sulphate
make the medium strongly acidic
increase the rate of formation of crystals
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