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How Many Hours Does It Take to Reduce 3 Moles of Fe^(3+)To Fe^(2+) with 2.0 a Current Intensity? - ISC (Arts) Class 12 - Chemistry (Theory)

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ConceptNormality, Molality Simple Problems Relating Mass, Molar Mass and Mole

Question

How many hours does it take to reduce 3 moles of Fe^(3+)to Fe^(2+) with 2.0 A Current intensity?

Solution

Fe^(3+) + e^(-) -> Fe^(2+)

∵ for 1 mole of Fe^(3+),  1 mole of e^(-) is required

∴ for 3 moles of Fe^(3+), 3 moles of e^(-) are required

∴ 3e^(-) = 3F = 3 xx 96500C

Q = I xx t

3 xx 96500 = 2 xx t

:. t = (3 xx96500)/(2 xx 3600)

t = 40.2 hrs

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APPEARS IN

2014-2015 (March) (with solutions)
Question 1.3.2 | 1.00 mark
Solution How Many Hours Does It Take to Reduce 3 Moles of Fe^(3+)To Fe^(2+) with 2.0 a Current Intensity? Concept: Normality, Molality - Simple Problems Relating Mass, Molar Mass and Mole.
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