The standard reduction potential for the Cu^2+/Cu redox couple is +0.34 V; that

Question

The standard reduction potential for the Cu^2+/Cu redox couple is +0.34 V; that for H_2 OJ_2, OH^- at a ph of 7 is -0.4] V. For the electrolysis of a neutral 1.0 M CuSO_4 solution, write the equation for the half-reaction occurring at the cathode at standard conditions. In an electrolytic cell. a. reduction occurs at the (name of electrode) b. the anode is the (sign) electrode c. anions flow toward the (name of electrode) d. electrons flow from the (name of electrode) to (name of electrode) e. the cathode should be connected to the (positive/negative) terminal of the dc power supply

Explanation / Answer

1)Here in the above cell Cu2+/Cu is the electrode where reduction takes place since reduction potential of Cu2+/Cu

System is higher than that of H2o /H2 system

Hence Cu2+/Cu is cathode here.

Cell reaction is -. Cu2++2e-=Cu

2)a) cathode

b) positive

C)anode

D)anode to cathode

E) negative terminal

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