Group 2 metals

Question 1

What happens when you add water to a group 2 metal?

Answer 1

It forms a metal hydroxide + H2

e.g Mg(OH)2 + H2

Question 2

What happens when you add steam to a group 2 metal?

Answer 2

It forms a metal oxide + H2

e.g MgO + H2

Question 3

How can you test for sulphates (SO4)?

Answer 3

add HCL and BaCl2

a white precipitate of BaSO4 should have been produced

Question 4

How does solubility of a group 2 hydroxide/sulphate vary going down the group?

Answer 4

Hydroxides increases in solubility going down the group.

Sulphates decreases in solubility going down the group.

Question 5

What is Mg(OH)2, BaSO4 and Ca(OH)2 used for?

Answer 5

Mg(OH)2 = antacid (acid reflux)
BaSO4 = barium meal for x-rays
Ca(OH)2 = slaked lime neutralise acidic soil

Question 6

What metal is used in the extraction of titanium from titanium chloride and how?

Answer 6

Magnesium.
TiCl4 + 2Mg —> 2MgCl2 + Ti

Question 7

What is used in flue gas removal and how?

Answer 7

Calcium oxide.
CaO + 2H20 + SO2 —-> CaSO3 + 2H20