In Electrolysis of aq NaNO3, Na+ is:
Correct answer: C. Does not discharge
- A. Discharged at anode
- B. Discharged at cathode
- C. Does not discharge
- D. None of these options is correct
Explanation
Once it's aqueous, the Na+ and NO3- will compete with water which is H2O. The anion will be attracted to the cathode and the cation will be attracted to the anode. The anion of aqueous NaNO3 is H2O and Na+ ion. Since H2O is stronger than Na+ ion, H2O is chosen and reduced to hydroxide and hydrogen gas. At the anode, H2O is not chosen because H2O is weaker than NO3-. NO3- is oxidized to nitrogen monoxide and 2 moles of water.
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