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Faraday's First Law

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Question

Calculate the Avogadro's number using the charge on the electron $1.60 \times 10^{- 19} C$ and the fact that $96500 C$ deposit $107.9 g$ silver from its solution.

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Solution

$96500 C$ deposits 1 equivalent of silver
$∴ 96500 C$ is charge on 1 mole of electrons.
$∴ 1.6 \times 10^{- 19} \times$ (no. of electrons in 1 mole) $= 96500$
No. of electrons in 1 mole $=$ Avogadro number $= 6.03 \times 10^{23}$

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