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Consider a titration of K2 Cr2 O7 solut...

Consider a titration of `K_2 Cr_2 O_7` 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
`6Fe^(2+) + Cr_2 O_7^(2-) + 14 H^+ to 2Cr^(3+) +6Fe^(3+) + 7 H_2O`
from Mohr .s salt
No of moles of Mohr.s salt required per mole of dichromate is 6 .
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