First slide

Faraday's Laws

Question

One gm metal M³⁺ was discharged by the passage of 1.81 x 10²³ electrons. what is the atomic weight of metal?

Easy

A

33.35
B

133.4
C

66.7
D

None of these

Solution

When 1 mole of e^- passed, wt. of substance deposited
$= \frac{1 \times 6 .023 \times 10^{23}}{1 .81 \times 10^{23}} \Rightarrow 3 .34 g = eq . wt$
$∴$ atomic wt. of metal =3.34 x 3 = 10.03 g

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