Redox and Equivalent ConceptMedium
Question
A quantity of 10 g of a sample of silver, which is contaminated with silver sulphide, gave 11.2 ml of hydrogen sulphide at 0o C and 1 atm, on treatment with excess of hydrochloride acid. The amount of silver sulphide in the sample is (Ag = 108)
Options
A.1.24 g
B.124 mg
C.5 × 10−3 mol
D.62 mg
Solution
$n_{eq}Ag_{2}S = n_{eq}H_{2}S$
Or $\frac{w}{248} \times 2 = \frac{11.2}{22400} \times 2 \Rightarrow w = 0.124\text{ g}$
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