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216 \mathrm{~g} of silver (molar mass108 \mathrm{~g} \mathrm{~mol}^{-1} ) is deposited at cathode from \mathrm{AgNO}_3 (aq) solution by certain quantity of electriaty. The volume (in L) of oxygen gas produced at 273 \mathrm{k}  and 1 bar pressure from water by the same quantity of electricity is

Option: 1

24.6 L


Option: 2

32.4 L


Option: 3

11.2 L
 


Option: 4

36.7 L


Answers (1)

best_answer

\mathrm{(n \mathrm{Ag})=\frac{216}{108}=2 \text { mole } }
\mathrm{\mathrm{Ag}^++e^{-} \rightarrow \mathrm{Ag} }
1F charges is required to deposit 1 mole of \mathrm{\mathrm{Ag} } 
\mathrm{ \mathrm{H}_2 \mathrm{O} \rightarrow \frac{1}{2} \mathrm{O}_2+2 \mathrm{H}^{+}+2 e^{-} }

2F charges is required to deposite   \mathrm{\frac{1}{2}mol}
\mathrm{ V_{\mathrm{O}_2} =\frac{n R T}{P} }
\mathrm{ V_{\mathrm{O}_2} =\frac{1}{2} \times \frac{0.0821 \times 273}{1} }
\mathrm{ V_{\mathrm{O}_2} =11.2 \mathrm{~L} }.

Posted by

Divya Prakash Singh

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