First slide

Faraday's Laws

Question

The element indium is to be obtained by electrolysis of a molten halide of the element. Passage of a current of 3.20 A for a period of 40.0 min results in formation of 3.05 g of In. What is the oxidation state of indium in the halide melt

Easy

A

3
B

2
C

5
D

1

Solution

$\begin{array}{l} 3 .05 = \frac{114 .8}{n} \times \frac{3 .2 \times 40 \times 60}{96, 500} \\ ∴ n = 3 \end{array}$

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