Chemistry
Explain the following :
When a dilute aqueous solution of sodium chloride is electrolysed between platinum electrodes, hydrogen gas is evolved at the cathode but metallic sodium is not deposited. Why?
Related Questions
Explain the following :
During the electrolysis of an aqueous solution of NaCl, hydrogen ion is reduced at the cathode and not the sodium ion though both Na+ and H+ ions are present in the solution.
Explain the following :
On electrolysis of dilute copper (II) sulphate solution, copper is deposited at the cathode but no hydrogen gas evolves there. Explain why.
Explain the following :
Zinc can produce hydrogen on reacting with acids but copper cannot. Explain.
During the electrolysis of molten lead bromide, which of the following takes place ?
- Bromine is released at the cathode
- Lead is deposited at the anode
- Bromine ions gain electrons
- Lead is deposited at the cathode