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Q.

An sample of NaCl with 50% purity is added into aqueous solution having excess AgNO₃ . AgCl precipitate is filtered, washed and dried weighing 2.87 gm. If the reaction yield is 20%, then find the amount of sample.

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a

23.4 gm

b

11.7 gm

c

20 gm

d

12.8 gm

answer is B.

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Detailed Solution

Amount of sample,

$x =$ $\frac{2.87}{143.5} \times \frac{1}{0.2} \times \frac{1}{0.5} \times 58.5$

$= 11.7 g$

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An sample of NaCl with 50% purity is added into aqueous solution having excess AgNO3 . AgCl precipitate is filtered, washed and dried weighing 2.87 gm. If the reaction yield is 20%, then find the amount of sample.