Consider a galvanic cell with a beaker of Chromium(III) nitrate Cr(NO3)3 and a beaker of Copper(II) nitrate Cu(NO3)2. The Chromium(III) nitrate beaker contains a strip of chromium, and the Copper(II) nitrate cell contains a strip of copper. A wire runs between the strips. The reaction that occurs is as follows:
2Cr(s) + 3Cu2+(aq) → 2Cr3+(aq) + 3Cu(s)
In three to five sentences, list which electrode is the anode and which is the cathode and the half reactions that occur at each electrode.
1 answer
The Chromium strip is the anode and the Copper strip is the cathode. At the anode, the half reaction is 2Cr(s) → 2Cr3+(aq) + 6e-. At the cathode, the half reaction is 3Cu2+(aq) + 6e- → 3Cu(s).
1 answer