Question

The mass of silver (Molar mass of Ag : 108 gmol^–1 ) displaced by a quantity of electricity which displaces 5600 mL of O₂ at S.T.P. will be _____ g.

Answer 1

Correct Answer: 108

The equation for the equivalent of Ag is:

$$\text{Eq. of Ag} = \text{Eq. of } O_2$$

Let x grams of silver be displaced.

$$\frac{x}{108} = \frac{5.6}{22.7} \times 4$$

Using the molar volume of gas at STP (22.7 L), we get:

$$x = 106.57 \, \text{g}$$

Thus, the answer is approximately 107 g.

Alternatively, using 22.4 L as the molar volume at STP:

$$\frac{x}{108} = \frac{5.6}{22.4} \times 4$$

which gives $$x = 108 \, \text{g}$$.