Question

Which half-cell reaction would have the greatest tendency to occur at the cathode?

Answer 1

The correct answer is the second.

Step-by-step explanation:

Oxidation occurs when an element loses electrons, acquiring a positive charge. Reduction occurs when an element gains electrons and goes from a positively charged state to a neutral one.

Aluminum metal (Al) oxidizes, so we say that Al is the reducing species, which acts by reducing
`Al^(3+)`. Copper (
`Cu^(2+)`) is reduced, so it is the oxidizing agent, it acts oxidizing to Cu.

`Cu^(2+)` oxidizes to Cu, and Al reduces to
`Al^(3+)`.

Have a nice day!

Answer 2

Answer A
That is cu^2+ reduces to CU, and Al oxidizes to Al^3+
At the cathode reduction take place while at the anode oxidation take place. copper ions are reduce to copper metal when two electrons are added,
the half cell reaction is as follows
3Cu^2+ + 2e- --> 3CU(s)