Sulfur and Carbonates

Question 0

Name 3 sources of sulfur.

Answer 0

1. Compounds in crude oil and natural gas
2. Metal sulphide ores
3. Natural deposits if the element underground/around volcanoes

Question 1

Name 3 uses of sulfur.

Answer 1

1. Making sulfuric acid
2. A bleach in the manufacture of wood pulp for paper
3. A food preservative (by killing bacteria)

Question 2

What are the essential conditions in the contact process?

Answer 2

Temperature - 450 degrees
Pressure - 1 atmosphere
Catalyst - vanadium (V) oxide

Question 3

Name 2 uses of calcium carbonate (limestone).

Answer 3

1. Manufacture of iron in the blast furnace.

2. Manufacture of cement.

Question 4

Give an example of how lime/slaked lime is used to neutralise acidic industrial waste products.

Answer 4

The desulfurisation of flue gas.

Question 5

What is the chemical formula for lime?

Answer 5

CaO

Question 6

Describe 4 properties of dilute sulfuric acid.

Answer 6

1. Turns universal indicator red.
2. Reacts with metals to form sulfates and hydrogen
3. Reacts with bases to form sulfates and water.
4. Reacts with metal carbonates to form sulfates and carbon dioxide

Question 7

How is lime manufactured?

Answer 7

The thermal decomposition of limestone.

Question 8

Name 2 uses of lime/slaked lime.

Answer 8

1. Treating acidic soil

2. Neutralising acidic industrial waste products.