Group 2 metals

Question 1

What can Mg(OH)2 be used for?

Answer 1

Used as slaked lime for neutralising acidic grounds in agriculture

Question 2

Do the solubilities increase going up or down the group?

Answer 2

Solubilities increase going down the group

Question 3

Is Mg(OH)2 soluble?

Answer 3

Almost insoluble

Question 4

Is Ca(OH)2 soluble?

Answer 4

Sparingly soluble

Question 5

What solution does Ba(OH)2 produce?

Answer 5

Alkaline

Question 6

Write the ionic equation for the reaction between barium hydroxide and water.

Answer 6

Ba(OH)2 (aq) + aq → Ba2+ (aq) + 2OH- (aq)

Question 7

Do the solubilities of sulphates increase going up or down the group?

Answer 7

Solubilities increase going up the group

Question 8

What can BaSO4 be used or?

Answer 8

X-rays

Question 9

How do you test for SO42-?

Answer 9

The solution is acidified with HCl or HNO3 first

Then BaCl is added to the solution

Ba2+ (aq) + SO42- (aq) → BaSO4 (s)

White insoluble solid

The solution is acidified first to remove CO32- ions as CO2