100 mL solution of ferric alum `[Fe_(2)(SO_(4))_(3).(NH_(4))_(2)SO_(4).24H_(2)O`
`(Mw=964g mol^(-1))` containing `2.41 g ` salt was boiled with Fe when the reaction
`Fe+Fe_(2)(SO_(4))_(3)to3FeSO_(4)`
Takes place. The unreacted iron was filtered off and the solution was titrated with `(M)/(60)K_(2)Cr_(2)O_(7)` in acidic medium.
Q. Moles of `FeSO_(4)` formed when Fe reacts with `Fe(2)(SO_(4))_(3)` is

Options

A. 0.0075
B. 0.005
C. 0.001
D. 0.002

Answer

A

Explanation

`Fe+Fe_(2)(SO_(4))_(3)tounderset(3 mol)(3FeSO_(4))`
`1 " mol of "Fe_(2)(SO_(4))_(3).(NH_(4))_(2)SO_(4).24H_(2)O-=1 mol Fe_(2)(SO_(4))_(3)`
`(2.41)/(964)` " mol of "ferric alum `-=(2.41)/(964) " mol of "Fe_(2)(SO_(4))_(3)`.
`-=(3xx2.41)/(964)`
`=0.0075 " mol of "FeSO_(4)`