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The d- and f-Block Elements
Preparation of Mohr's Salt
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- Role of acid in preventing hydrolysis during Mohr's salt preparation
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2024 1 question
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During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of $Fe^{2+}$ ion?$Fe^{2+}$ (and $Al^{3+}$) ions undergo hydrolysis in water. So while preparing an aqueous solution of ferrous ammonium sulphate (Mohr's salt), 2–3 mL of dilute sulphuric acid is added to prevent the hydrolysis of $Fe^{2+}$ ions.