Question

3. Why is dilute sulphuric acid added while preparing a standard solution of Wohr's salt
Ans​

Answer 1

Answer:

sulphuric acid in the preparation of a standard solution of Mohr's saltin redox titration is to prevent hydrolysis of the Fe2+ ions. Ferrous ions of Mohr's salt undergo hydrolysis in aqueous solution. ... Another reason is also to prevent the oxidation of Fe2+ ions of Mohr's salt to Fe3+ ions.

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Answer 2

Explanation:

to stop the oxidation of mohar salt we use dilute sulphuric acid to prepare standard solution