Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

The molar ratio of $F e^{2 +}$ to $F e^{3 +}$ in a mixture of $F e S O_{4}$ and $F e_{2} (S O_{4})_{3}$ having equal number of sulphate ions in both ferrous and ferric sulphates is

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Solution:

$3 F e S O_{4} \to 3 F e^{2 +} + 3 S O_{4}^{2 -}$
$F e_{2} (S O_{4})_{3} \to 2 F e^{3 +} + 3 S O_{4}^{2 -}$
Suppose x mole $S O_{4}^{2 -}$ ions are furnished by both $F e S O_{4}$ and $F e_{2} (S O_{4})_{3}$ .
Number of moles of $F e^{2 +} = x$
Number of moles of $F e^{3 +} = \frac{2}{3} x$
$F e^{2 +} : F e^{3 +} = x : \frac{2}{3} x$
$= 3 : 2$ .

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Mole ConceptSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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