3.2.3.2 Uses of chlorine and chlorate (I)

Question 1

What is disproportionation?

Answer 1

Where an element simultaneously oxidises and reduces

Question 2

What is the reaction for chlorine reacting with water?

Answer 2

Cl2(g) + H2O(l) <-> HCl(aq) + HClO(aq)

Question 3

What is the oxidation half-equation for chlorine reacting with water?

Answer 3

Cl2 + H2O -> 2HClO + 2H+ + 2e-

Question 4

What is the reduction half equation for chlorine reacting with water?

Answer 4

Cl2 -> 2e- + Cl2

Question 5

What is the equation for chlorine reacting with cold dilute sodium hydroxide?

Answer 5

Cl2(aq) + 2 NaOH(aq) -> NaCl(aq) + NaClO(aq) + H2O(l)

Question 6

What are the uses of chlorine?

Answer 6

As bleach to disinfect and water treatment

Question 7

What is the reaction of chlorine with water in sunlight?

Answer 7

2Cl2 + 2H2O -> 4H+ +4Cl- +O2