Reactions of Group 2 Metals

Question 1

What is the equation for a group 2 metal reacting with oxygen?

Answer 1

metal (s) + oxygen (g) –> metal oxide (s)

Question 2

What is the equation for a group 2 metal reacting with water?

Answer 2

metal (s) + water (l) –> metal hydroxide (aq) + hydrogen (s)

Question 3

What is the equation for a group 2 metal reacting with hydrogen chloride?

Answer 3

metal (s) + hydrogen chloride (aq) –> metal chloride (aq) + hydrogen (g)

Question 4

What is the equation for a group 2 metal oxide reacting with water?

Answer 4

metal oxide (s) + water (l) –> metal hydroxide (aq)

Question 5

What is the equation for a group 2 metal hydroxide reacting with water?

Answer 5

metal hydroxide (s) + water (l) –> metal ion (aq) + hydroxide ion (aq)

Question 6

What happens to pH of a metal hydroxide in water as you go down group 2 and why?

Answer 6

It increases

Solubility and hydroxide ions increase

Question 7

Why does colour change as you add more water?

Answer 7

More can dissolve so the colour changes (pH increases)

Question 8

What is the use of Calcium Hydroxide?

Answer 8

neutralise acidic soil

Question 9

What is the use of Magnesium Hydroxide?

Answer 9

neutralise stomach acid

Question 10

What is the use of Calcium Carbonate and Magnesium Carbonate?

Answer 10

neutralise stomach acid