JAMB - Chemistry (1979 - No. 8)
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
คำอธิบาย
Electrolysis of conc NaOH using platinum elcetrodes:
At the cathode, Hydrogen gas is evolved
at the anode, Oxygen gas is evolved.