Electrochemistry Question 4
Question 4 - 2024 (27 Jan Shift 1)
The mass of silver (Molar mass of $Ag: 108 gmol^{-1}$ ) displaced by a quantity of electricity which displaces $5600 mL$ of $O _2$ at S.T.P. will be ________ g.
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Answer (108)
Solution
Eq. of $Ag=$ Eq. of $O _2$
Let $x$ gm silver displaced, $\frac{x \times 1}{108}=\frac{5.6}{22.7} \times 4$
(Molar volume of gas at STP $=22.7$ lit) $x=106.57 gm$
Ans. 107
OR, as per old STP data, molar volume $=22.4 lit$
$\frac{x \times 1}{108}=\frac{5.6}{22.4} \times 4, x=108 gm$.
Ans. 108
