Chemistry Daily Challenge 18-July-2015

Chemistry Level 3

The EMF of a cell corresponding to the reaction

\[\text{Zn}(s)+2\text{H}^+(aq) \to \text{Zn}^{+2}(0.1\text{ M})+\text{H}_2(g,1 \space \text{atm})\]

is 0.28 volts at 298 K.

\(\color{blue}{\text{Calculate the pH of the solution at the hydrogen electrode.}}\)

\[\begin{align} E_{\text{Zn}^{2+}|\text{Zn}}&=-0.76\text{ V}\\ E_{\text{H}^{+}|\text{H}_2}&=0\text{ V} \end{align}\]

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