Group 2

Question 1

Solubility

Answer 1

Compounds of group 2 elements that contain singly charge negative ions increase in solubility as you go down the group. For example OH-

Compounds that contain doubly charged negative ions decrease in solubility as you go down the group. For example SO42- or CO32-

Question 2

Group 2 elements reacting with water

Answer 2

Reacts with water to produce hydroxide and hydrogen gas

Question 3

Group 2 elements burning in oxygen

Answer 3

They burned in oxygen to form oxides

Question 4

Group 2 elements react with chlorine

Answer 4

They reacts with chlorine to produce chlorides

Question 5

Ionisation energy

Answer 5

As you go down the group each element gains and an electron shell

The extra inner shell shields the outer electrons from the attraction of the nucleus. This means:

• electrons are further away from nucleus
• there is a reduction in electrostatic attraction between nucleus and outer shell

Question 6

Group 2 elements and bases

Answer 6

React readily with water to form metal hydroxide which dissolve

Except beryllium oxide which DOES NOT react with water and it’s also INSOLUBLE

As you go down the group, oxides form more strongly alkaline solutions due to hydroxides is becoming more soluble

Question 7

Reactions of oxides with water and dilute acid

Answer 7

Water:

MgO + H2O —

Question 8

Reaction of hydroxides with water and dilute acid

Answer 8

Water :

Mg(OH)2 (s) —