Group 2

Question 1

Trend in ionisation energy

Answer 1

Decreases down the group

Question 2

Trend in reactivity

Answer 2

Increases down the group

Question 3

Trend in the solubility of group 2 sulfates

Answer 3

Decreases down the group

Question 4

Trend in solubility of group 2 hydroxides

Answer 4

Increases down the group

Question 5

Reaction of group 2 metals with water

Answer 5

M + 2H2O —> M(OH)2 + H2

Question 6

Reaction of group 2 metals with Chlorine

Answer 6

M + Cl2 —-> MCl2

Question 7

Reaction of Group 2 metals with oxygen

Answer 7

2M + O2 —-> 2MO

Question 8

Reaction of group 2 oxides with HCl?

Answer 8

MO + 2HCl ——> MCl + H2O

Question 9

Reactions of group 2 hydroxides with HCl

Answer 9

M(OH)2 +2HCl —-> MCl2 +2H2O

Question 10

Reaction for thermal decomposition of group 2 Carbonates

Answer 10

MCO3 ——-> MO + CO2

Question 11

Reaction for thermal decomposition of group 2 nitrates

Answer 11

2M(NO3)2 ——> 2MO + 4NO2 +O2

Question 12

Trend in thermal stability of group 2 carbonates/nitrates

Answer 12

• Increase in stability down the group

Question 13

Explain the trend in thermal stability of group2 carbonates/nitrates

Answer 13

• Carbonates/nitrate ion has a large electron cloud
• This is distorted when near group 2 ions
• As you go down the group, the charge density of group 2 ions decreases
• So the carbonate/nitrate ion is less distorted
• The less distortion, the more stable