Solubility of Group 2 Compounds: Hydroxides & Sulfates

Question 1

Group 2 hydroxides

Going down the group, the solutions formed from the reaction of group 2 oxides with water become more

Answer 1

alkaline

Question 2

When the oxides are dissolved in water, the following ionic reaction takes place:

Answer 2

O2- (aq) + H2O (l) → 2OH- (aq)

Question 3

The higher the concentration of OH- ions formed, the more

Answer 3

alkaline the solution

Question 4

The alkalinity of the solution formed can therefore be explained by the solubility of the Group 2 hydroxides

The hydroxides dissolve in water as follows:

Answer 4

X(OH)2 (aq) → X2+ (aq) + 2OH- (aq)

Where X is the Group 2 element

Question 5

When the metal oxides react with water, a group 2 ……. id formed

Answer 5

group 2 Hydroxide

Question 6

Going down the group, the solubility of these hydroxides

This means that the concentration of OH- ions…….

Answer 6

increases

This means that the concentration of OH- ions increases, increasing the pH of the solution

As a result, going down the group, the alkalinity of the solution formed increases when Group 2 oxides react with water

Question 7

solubility meaning

Answer 7

is the maximum concentration of solute (a substance that dissolves in a solvent) that can be dissolved in the solvent (dissolver).

Question 8

Going down the group, the solubility of the hydroxides increases which means that the solutions formed from the reactions of the group 2 metal oxides and water become more

Answer 8

alkaline going down the group