Extraction of Chlorine from brine

Question 1

Besides reductions, some extractions are based on oxidation particularly for non-metals. Give an example

Answer 1

A very common example of extraction based on
oxidation is the extraction of chlorine from brine (chlorine is abundant in sea water as common salt) .
2Cl–(aq) + 2H2O(l) → 2OH–(aq) + H2(g) + Cl2(g)

Question 2

What is name of the process used to extract chlorine

Answer 2

Castner-Kellener process

Question 3

At which electrode is chlorine obtained during electrolysis?

Answer 3

At the anode

Question 4

What are the products obtained in the electrolysis of brine?

Answer 4

Sodium hydroxide(electrolytic cell), Chlorine(anode) and hydrogen(cathode)

Question 5

Give an example of the oxidation-reduction method used in case of metals

Answer 5

In the metallurgy of gold or silver

Question 6

How is chlorine obtained?

Answer 6

By the electrolysis of brine(aqueous sodium chloride)