We have to determine why the Na+ ions migrate into the cathode half-cell as the cell reaction proceeds.
Step 1. Write the two half-cell reactions and determine the half-cell potentials (refer to the Standard Reduction Potential Table)
Step 2. Identify the reduction half-reaction (cathode) and the oxidation half-reaction (anode)
A voltaic cell using a standard hydrogen electrode (SHE). The anode half-cell is Zn metal in a Zn(NO3)2 (aq) solution, and the cathode half-cell is the SHE in an HNO3(aq) solution.
Why do Na+ ions migrate into the cathode half-cell as the cell reaction proceeds?
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Standard Hydrogen Electrode concept. If you need more Standard Hydrogen Electrode practice, you can also practice Standard Hydrogen Electrode practice problems.