Single Choice

A current of $$16$$ ampere flows through molten $$NaCl$$ for $$10$$ minute. The amount of metallic sodium that appears at the negative electrode would be

A$$0.23 gm$$
B$$1.15 gm$$
C$$2.3 gm$$
Correct Answer
D$$11.5 gm$$

Solution

Amount of $$Na^+$$ deposited
$$w=zIt$$
$$w=\dfrac{at \,wt.}{n\times f}\times I\times t$$ at wt. of $$Na=23$$
$$w=\dfrac{23}{1\times f}\times 16\times 10\times 60$$
$$w=\dfrac{220800}{f}\Rightarrow \dfrac{220800}{96500}$$
$$w=2.28gm$$ $$[w\approx 2.3gm]$$

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