3.2.2 Group 2 (inorganic chemistry)

Question 1

trend of reactivity with water in group 2 metals

Answer 1

increases going down the group

Question 2

Use of Mg in the extraction of Ti from TiCl4
Role of Mg

Answer 2

2Mg + TiCl4 –> 2MgCl2 + Ti
Magnesium is oxidised from 0 to +2
It acts as a reducing agent

Question 3

Solubility of group 2 hydroxides

Answer 3

Increases going down the group

Question 4

Uses of Magnesium Hydroxide

Answer 4

Indigestion relief

Question 5

Uses of Barium Sulphate

Answer 5

Take X-rays of digestive tracts as it is insoluble

Question 6

Group 2 reaction with liquid water

Answer 6

Mg(s) + 2H20(l) –>Mg(OH)2 (s) + H2(g)

Question 7

Group 2 reactions with steam equation and observations

Answer 7

Mg(s) + H2O(g) –>MgO(s) + H2(g)
Bright white light
White powder formed

Question 8

Testing for Mg2+ ions in a solution
observations
ionic eq.

Answer 8

NaOH(aq)
Sodium Hydroxide
White precipitate forms
Mg2+(aq) + 2OH-(aq) –>Mg(OH)2 (s)

Question 9

Test for OH- ions in a solution
observations
ionic eq

Answer 9

Mg(NO3)2 (aq)
Magnesium nitrate solution
White precipitate forms
Mg2+(aq) + 2OH-(aq) –>Mg(OH)2 (s)

Question 10

solubility of group 2 sulphates

Answer 10

decreases going down the group

Question 11

Test for Ba2+ ions in a solution
observations
ionic equation

Answer 11

H2SO4 (aq)
Sulfuric acid solution
White precipitate forms
Ba2+(aq) + [SO4]2-(aq) –>BaSO4 (s)

Question 12

Test for [SO4]2- ions in solution
observations
equations

Answer 12

BaCl2 (aq)
Acidified barium chloride
White precipitate forms
Ba2+(aq) + [SO4]2-(aq) –>BaSO4 (s)