What change will occur during the electrolysis of brine using carbon electrodes?
-
Chlorine will be given off at the anode
- Oxygen gas will be given off at the anode
- Sodium will be deposited at the cathode
- The resulting solution, after electrolysis, will be acidic.
- The volumes of hydrogen and chlorine given off during the same time are equal
The correct answer is: A
Explanation
Chlorine is discharged as follows:
\(Cl^- \to Cl + e^-\)
\(Cl + Cl \to Cl_{2(g)}\)
This reaction occurs at the anode.