Question
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.
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.
Answers
Bot
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).