Courses
Courses for Kids
Free study material
Free LIVE classes
More

# The electrolytic reduction technique is used in the extraction of:

Last updated date: 20th Mar 2023
Total views: 205.2k
Views today: 4.84k
Verified
205.2k+ views
Hint :Electrolytic reduction is a form of electrolysis in which electric current passes through an ionic substance in a molten or dissolved state causing the electrodes to react chemically and the materials to decompose. By using this process, the hydroxides, oxides and chlorides of metals in the combined state are electrically reduced. The metals are collected at the cathode.

But for the metals that lie above carbon in the reactivity series, their respective oxides cannot be reduced by heating it with $C{O_2}$ . Oxides of strong electropositive metals such as $K,{\text{ }}Ca,{\text{ }}Na,{\text{ }}Al{\text{ }}and{\text{ }}Mg$ are very stable. It is difficult to reduce them into metallic states by simple carbon reduction. Hence, chlorides/oxides/ hydroxides of such metals are extracted by passing electricity through them.
$At{\text{ }}cathode:{\text{ }}N{a^ + } + {e^ - } \to Na\left( s \right)$
$At{\text{ }}anode:{\text{ }}Cl \to \dfrac{1}{2}C{l_2}\left( g \right) + {e^ - }$