1.

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)

Answer»

`700ml`
`175ml`
`350ml`
`200ML`

Solution :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`


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