1.

What volume of 0.2 M Ba( MnO_(4))_2solution is required for complete oxidation of 25 gm of 89.6% pure Fe Co, in acidic medium according to the reaction MnO_(4)^(-) +FeCr_(2)O_(4) rarrFe^(+3) +Cr_(2)O_(7)^(2-)+Mn^(+2)

Answer»

700 ml
175 ml
350 ml
200 ml

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 xx0.2xx10=(25xx89.6xx10^(3))/(100xx((224)/7))`
`:. V=350 ml`


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