Question

What volume of `0.2M Ba(MnO_(4))_(2)` solution is required for complete oxidation of 25 gm of `89.6%` pure `Fe Cr_(2)O_(4)` in acidic medium according to the reaction
`MnO_(4)^(-) +FeCr_(2)O_(4) rarr Fe^(+3) +Cr_(2)O_(7)^(-2) +Mn^(+2)`
A. `700ml`
B. `175ml`
C. `350ml`
D. `200ml`

Answer 1

Correct Answer - C
No. of milli equivalents of `Ba(MnO_(4))_(2) =`
No. of milli equivalents of `FeCr_(2)O_(4)`
n-factor of `Ba(MnO_(4))_(2) = 10`
n-factor of `FeCr_(2)O_(4) = 7`
`:. V xx 0.2 xx 10= (25 xx 89.6 xx 10^(3))/(100xx((224)/(7))):. V = 350ml`