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Q.

The molar ratio of Fe++  to Fe+++ in a mixture of FeSO4 and Fe2 SO43 having equal number of sulphate ions in both ferrous and ferric sulphate is

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a

can't be detrmined

b

3 : 2

c

2 : 3

d

1 : 2

answer is B.

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Detailed Solution

FeSO4

1 mole of  SO42- = 1 mole Fe2+

In  Fe2 SO43

3 moles of  SO42- = 2 mole Fe3+

1 mole of  SO42- = 23 moles Fe3+

ratio = Fe2+Fe3+ = 12 = 32

 

 

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