Group 2 - Sulfates & Hydroxides

Question 1

What is the solubility trend of group 2 hydroxides?

Answer 1

The solubility of group 2 hydroxides increases down the group

Question 2

What is the physical appearance of group 2 hydroxides?

Answer 2

They are all white solids

Question 3

What is the solubility trend of group 2 sulfates?

Answer 3

The solubility of group 2 sulfates decreases down the group

Question 4

Which group 2 sulfate is virtually insoluble?

Answer 4

Barium sulfate

Question 5

Why is barium sulfate safe for medical use despite barium compounds beign toxic?

Answer 5

Barium sulfate is so insoluble that it does not dissolve in the body, preventing toxicity

Question 5

Why is barium sulfate used in medical x - rays?

Answer 5

Barium sulfate is very good at absorbing X - rays and is used as a barium meal to outline the gut

Question 6

Out of the following hydroxides, rank them from least to most soluble:
Calcium hydroxide {Ca(OH)2}
Barium hydroxide {Ba(OH)2}
Magnesium hydroxide {Mg(OH)2}
Strontium hydroxide {Sr(OH)2}

Answer 6

1. Mg(OH)2
2. Ca(OH)2
3. Sr(OH)2
4. Ba(OH)2

Question 7

Out of the following sulfates, rank them from most to least soluble:
Barium sulfate {Ba(OH)2}
Magnesium sulfate {MgSO4}
Strontium sulfate {Sr(OH)2}
Calcium sulfate {CaSO4}

Answer 7

1. MgSO4
2. CaSO4
3. SrSO4
4. BaSO4

Question 8

What is the ionic equation for the formation of calcium sulfate, which is representative of the rest of the sulfates?

Answer 8

Ca2+ (aq) + SO4 2- (aq) ⇒ CaSO4 (s)