WAEC - Chemistry (1989 - No. 17)
Why is potassium fluoride added to the electrolyte in the extraction of sodium from fused sodium chloride?
Pure sodium chloride does not conduct electricity
Potassium fluoride prevents the sodium produced from attacking the electrodes
Potassium fluride increases conductivity
Potassium fluride reduces the temperature at which sodium chloride fuses
the potassium fluride acts as a catalyst