3.2.2 Group 2

Question 1

Complete the equation

Mg + H2O(l) –>

Answer 1

Mg(OH)2 + H2

Question 2

Complete the equation

Ca + H2O(l) –>

Answer 2

Ca(OH)2 + H2

Question 3

Complete the equation

Mg + H2O(g) –>

Answer 3

MgO + H2

Question 4

Which is the least soluble Group 2 hydroxide?

Answer 4

Mg(OH)2

Sparingly Soluble

Question 5

Which is the most soluble Group 2 hydroxide?

Answer 5

Ba(OH)2

Question 6

Which is the least soluble Group 2 sulfate?

Answer 6

BaSO4

Question 7

Which is the most soluble Group 2 sulfate?

Answer 7

MgSO4

Question 8

What is the test for sulfate ions?

Answer 8

BaCl2

Question 9

What is observed when BaCl2 is added to CaSO4

Answer 9

White precipitate

BaSO4 is formed

Question 10

What is observed when barium chloride is added to sulfuric acid?

Answer 10

White precipitate

BaSO4 is formed

Question 11

Give a medical use of barium sulfate

Answer 11

Stomach X-rays

‘Barium meal’

Question 12

Give a use for magnesium hydroxide

Answer 12

To neutralise stomach acid

Question 13

Magnesium chloride can be used to test for the present of which negative ions?

Answer 13

Hydroxide ions (OH-)

Mg(OH)2 will form giving a white precipitate

Question 14

What is observed when MgCl2 is added to NaOH?

Answer 14

White precipitate

Mg(OH)2 is formed
Mg(OH)2 is sparingly soluble

Question 15

State the trend in reactivity with water down group 2

Answer 15

Reactivity increases

Mg is least reactive, Ba is most reactive

Question 16

What group 2 trend increase down the group?

Answer 16

Atomic radius

Question 17

What type of bonding do all group 2 elements have?

Answer 17

Metallic

Question 18

What is observed when Ba reacts with water?

Answer 18

A colourless solution and effervesence (fizzing)

Question 19

Which compound is used to treat the symptoms of indegestion?

Answer 19

Mg(OH)2

Magnesium hydroxide

Question 20

What products are formed when magnesium reacts with steam?

Answer 20

Magnesium Oxide and Hydrogen

MgO +H2