Which of the following statements applies during the electrolysis of sodium hydroxide solution using platinum electrodes?
Na+ ions are discharged at the cathode
Hydrogen ions are discharged at the cathode
the concentration of sodium hydroxide decrease at both electrode compartments
the concentration of sodium hydroxide increases at the cathode only
the concentration of sodium hydroxide increases at the anode only
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both B and E is correct for me cos when hydrogen ion are discharged in the anode, oxygen is liberated. Sodium ions are hereby left in solution around the cathode, this combines with excess hydroxyl ions to increase the concerntration of sodium hydroxide at the cathode compartment alone.
During electrolysis of sodium hydroxide solution, both the anode and cathode compartments experience a decrease in sodium hydroxide concentration as it decomposes into its constituent ions. Therefore, statement C is correct. and statement A is correct During the electrolysis of sodium hydroxide solution using platinum electrodes, Na+ ions are discharged at the cathode, resulting in the formation of sodium metal.
In electrolysis, the elements higher in the electrochemical series can not be displaced by those lower in the electrochemical series. Hence hydrogen ions are preferentially discharged at the cathode . The correct answer is D.
The correct option is A. Na+ ions are discharged at the cathode since the cathode is the negative electrode and reduced to Na .
The real A answer is not cathode but electrode there was a typographical error
