Other Reactions & Uses Of Chlorine & Its Compounds

Question 1

Chlorine reaction with water used for what

Answer 1

Purification

Question 2

Chlorine is slightly soluble in water, and actually reacts slightly with water in a what reaction

Answer 2

disproportionation reaction
Oxidation and redox reaction taken place

Question 3

Cl2 (g) + H2O (l) ➡️ HCl (aq) + HClO (aq) “chlorine water”
What happens to the chlorine

Answer 3

The chlorine is simultaneously oxidised and reduced.

Cl2 ➡️ HCl + HClO
0 -1. +1

Question 4

What is HClO and it’s role

Answer 4

chloric (1) acid.
It is a mild oxidising agent and effective at killing bacteria without being harmful to humans.

A small amount of chlorine dissolved in water will sterilise the water and chlorine is widely used in swimming pools and in water treatment for this reason.

Question 5

Drawbacks of using chlorine for purification

Answer 5

1. Chlorine is toxic to humans in anything other than very small doses, so care must be taken not to over chlorinate the water supply.
2. Chlorine may also form chlorinated organic molecules which are carcinogenic

Question 6

Chlorine reaction with cold dilute alkali used for what

Answer 6

Bleach

Question 7

Chlorine in cold dilute alkali reacts in what reaction

Answer 7

Chlorine disproportionates readily in dilute alkali in another disproportionation reaction

Question 8

Cl2 (g) + 2OH- (aq) ➡️ Cl- (aq) + ClO- (aq) + H2O (l)

Answer 8

chlorine is simultaneously oxidised and reduced

Cl2 + 2OH- ➡️ Cl- + ClO- + H2O
0 -1. +1

Question 9

What is the ion ClO- and it’s role

Answer 9

Chlorate (I) ion
It is an important oxidising agent and is the active ingredient in domestic bleach, NaClO