In industry, copper metal is purified using electrolysis. What happens to the masses of the electrodes, and how does the colour of the electrolyte change during this process?
- Amass of anode decrease; mass of cathode increase; little or no change occurs
- Bmass of anode decrease; mass of cathode increase; pale blue to blue
- Cmass of anode increase; mass of cathode decrease; little or no change occurs
- Dmass of anode increase; mass of cathode decrease; blue to pale blue