First slide

Nernst Equation

Question

The following cell is found to have EMF equal to zero. Pt, H₂ (x atm) | 0.01MH⁺ || 0.1MH⁺ | H₂ (y atm), Pt . The ratio $\frac{x}{y}$ is

Moderate

Solution

The Cell reaction is
$Anode\,\,\,\,\,\,\,:{H_2}\left( {xatm} \right) \to 2{H^ + }\left( {0.01M} \right) + 2{e^ - }$
$\underline {Cathode\,\,:2{H^ + }\left( {0.1M} \right) + 2{e^ - } \to {H_2}\left( {yatm} \right)}$
$\underline {{H_2}\left( {xatm} \right) + 2{H^ + }\left( {0.1M} \right) \to {H_2}\left( {yatm} \right) + 2{H^ + }\left( {0.01M} \right)}$
$0 = 0 - \frac{{0.0591}}{2}\log \frac{{{{\left( {0.01} \right)}^2}\left( y \right)}}{{{{\left( {0.1} \right)}^2}\left( x \right)}} \Rightarrow \frac{x}{y} = 0.01$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App