Which of the following statements is true for an electrochemical cell?

Question

Which of the following statements is true for an electrochemical cell? (A) H2 is anode and Cu is cathode (B) H2 is cathode and Cu is anode (C) Reduction occurs at H2 electrode (D) Oxidation occurs at Cu electrode

Tardigrade Admin · Accepted Answer

As Cu is below hydrogen in the electrochemical series. Hydrogen is oxidised at anode and comes out as H2, while Cu is reduced at the cathode 2H++2e- → H2, E°=0.0 V Cu2++2e- → Cu, E°=0.337 V

Q. Which of the following statements is true for an electrochemical cell?

$H_{2}$ is anode and $C u$ is cathode

$H_{2}$ is cathode and $C u$ is anode

Reduction occurs at $H_{2}$ electrode

Oxidation occurs at $C u$ electrode

As $C u$ is below hydrogen in the electrochemical series. Hydrogen is oxidised at anode and comes out as $H_{2}$ , while $C u$ is reduced at the cathode
$2 H^{+} + 2 e^{-} \to H_{2}$ , $E^{\circ} = 0.0 V$
$C u^{2 +} + 2 e^{-} \to C u$ , $E^{\circ} = 0.337 V$

Q. Which of the following statements is true for an electrochemical cell?

H2​ is anode and Cu is cathode

H2​ is cathode and Cu is anode

Reduction occurs at H2​ electrode

Oxidation occurs at Cu electrode

As Cu is below hydrogen in the electrochemical series. Hydrogen is oxidised at anode and comes out as H2​, while Cu is reduced at the cathode 2H++2e−→H2​, E∘=0.0V Cu2++2e−→Cu, E∘=0.337V

$H_{2}$ is anode and $C u$ is cathode

$H_{2}$ is cathode and $C u$ is anode

Reduction occurs at $H_{2}$ electrode

Oxidation occurs at $C u$ electrode

As $C u$ is below hydrogen in the electrochemical series. Hydrogen is oxidised at anode and comes out as $H_{2}$ , while $C u$ is reduced at the cathode
$2 H^{+} + 2 e^{-} \to H_{2}$ , $E^{\circ} = 0.0 V$
$C u^{2 +} + 2 e^{-} \to C u$ , $E^{\circ} = 0.337 V$