JEE Mains · Chemistry · STD 11 - 7. Redox reactions
While preparing crystals of Mohr's salt, dil \(H _2 SO _4\) is added to a mixture of ferrous sulphate and ammonium sulphate, before dissolving this mixture in water, dil \(H _2 SO _4\) is added here to for _______.
- A prevent the hydrolysis of ferrous sulphate
- B prevent the hydrolysis of ammonium sulphate
- C make the medium strongly acidic
- D increase the rate of formation of crystals
Answer & Solution
Correct Answer
(A) prevent the hydrolysis of ferrous sulphate
Step-by-step Solution
Detailed explanation
\(Fe ^{+2}\) 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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