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Amit Saxena Grade: upto college level
        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
3 years ago

Answers : (1)

Deepak Patra
askIITians Faculty
474 Points
										Sol. As mentioned in Q. 12, n-factor of dichromate is 6.
Also, n-factor of Mohr’s salt is 1 as :
FeSO4(NH4)2 SO4. 6H2O □(→┴(O.A) ) Fe3+
 Moh’s salt
∵ 1 mole of dichromate = 6 equivalent 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 slat.

3 years ago
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