Question

Fill in the blanks with suitable word:

(c) During electrolysis, positive ions move towards ___________.

Answer 1

Electrolysis

• It is a process that leads to the chemical changes when an electric current is passed through an electrolyte.
• This process works with direct current only.

Example: During electrolysis of Sodium chloride $\left(\mathrm{NaCl}\right)$.

$\mathrm{At}\mathrm{anode}:{\mathrm{Cl}}^{-}-{\mathrm{e}}^{-}\to \mathrm{Cl}$

$\mathrm{At}\mathrm{cathode}:{\mathrm{Na}}^{+}+{\mathrm{e}}^{-}\to \mathrm{Na}$

Cathode

• The cathode is the negative electrode through which the electrons enter the electrolyte.
• The cations are discharged at the cathode in the form of neutral atoms.
• Reduction takes place at the cathode.

Anode

• The anode is the positive electrode through which the electrons leave the electrolyte.
• The anions are discharged at the anode.
• Oxidation takes place at anode.

Hence, during electrolysis, positive ions move towards the cathode.