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 is : 107 gm or 108 gm

Eq. of Ag = Eq. of O₂ 

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