C13. Carbonates

Question 1

Uses of lime

Answer 1

1. In making steel from iron
2. To treat acidic soil
3. As a drying agent in industry

Question 2

Uses of slaked lime

Answer 2

1. To treat acidic soil

2. To neutralise acidic industrial waste gases (flue gas desulfurisation)

Question 3

Uses of calcium carbonate

Answer 3

1. Crushed limestone is used in extracting iron from iron ore
2. To make cement

Question 4

Flue gas desulfurisation

Answer 4

The removal of sulfur dioxide from the waste gases at power station before they go out of the flue