find moles

Asked by Harshal Saptarshi | 4th Sep, 2010, 11:41: PM

Expert Answer:

Only FeSO4. 7H2O can be oxidised since Fe is in +2 oxidation state.

Hence,

Milliequivalents of KmnO4 used = milliequivalents of green vitriol

Let the mass in gram of hydrated ferroussulphate be x

( x divided by 278) * 1000= 5.4 *0.1

 x = 0.15012

No. of moles of hydrated ferric sulphate in the mixture = (5.5 -0.15012 )/ (molecular wt of hydrated ferric sulphate)

= (5.5 -0.15012 )/ 552 = 0.0097 mole

Answered by  | 6th Sep, 2010, 02:44: PM

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