Use the glavanic cell reaction to answer the question
2Cr(s) + 3Cu2+(aq) --> 2Cr3+(aq) +3Cu(s)
which half reaction occurs at the cathode?
In the given galvanic cell reaction, electrons are transferred from the chromium (Cr) solid to the copper (Cu2+) ion. The half reaction that involves the reduction of a species is considered the cathode.
In this reaction:
2Cr3+(aq) + 3e- --> 2Cr(s)
This half-reaction involves the gain of electrons and the reduction of Cr3+ ions to Cr solid. Therefore, the half-reaction that occurs at the cathode is:
2Cr3+(aq) + 3e- --> 2Cr(s)