Which one of the following statements is true | vedclass

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(B) In a standard electrochemical cell (Daniel cell type or similar),the electrode with a lower reduction potential acts as the anode,and the electrod

Vedclass · Accepted Answer

$H_2$ is anode and $Cu$ is cathode

Vedclass · Answer

(B) In a standard electrochemical cell (Daniel cell type or similar),the electrode with a lower reduction potential acts as the anode,and the electrode with a higher reduction potential acts as the cathode. For the $H_2/H^+$ and $Cu^{2+}/Cu$ system,the standard reduction potential of $Cu^{2+}/Cu$ is $+0.34 \ V$ and $H^+/H_2$ is $0.00 \ V$. Since $E^{\circ}_{Cu^{2+}/Cu} > E^{\circ}_{H^+/H_2}$,$Cu$ acts as the cathode (where reduction occurs) and $H_2$ acts as the anode (where oxidation occurs). Therefore,$H_2$ is the anode and $Cu$ is the cathode.

Which one of the following statements is true for a standard electrochemical cell involving $H_2$ and $Cu$ electrodes?

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