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Consider the titration of potassium dich...

Consider the titration of potassium dichromate solution with acidified Mohr's Salt solution using dimethylamine as indicator. The number of moles of Mohr's Salt required per mole of dichromate ion is

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The following reaction occurs :
`6Fe^(2+) + Cr_(2)O_(7)^(2-) + 14H^(+) rarr 6 Fe^(3+) + 2 Cr^(3+) + 7H_(2)O`
From the above equation, we find that Mohr's salt `(FeSO_(4).(NH_(4))_(2)SO_(4).6H_(2)O)` and dichromate reacts in 6:1 molar ratio.
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