Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is:
A
3
B
4
C
5
D
6
Text Solution
Verified by Experts
The correct Answer is:
D
n-factor of dichtomate is 6. `underset("Mohr's salt")(FeSO_(4))_(2)SO_(4).6H_(2)O overset(O.A)rarr Fe^(3+)` `because` 1 mole of dichromate `=6` equilvalent of dichromate. `:.` 6 equivalent of Mohr's salt would be required. Since, n-factor of Mohr's salt is 1,6 equivalent of it would also be equal to 6 moles. Hence, 1 mole of dichromate will oxidise 6 moles of Mohr's salt.
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