Industry and Electricity

Question 1

Redox Titration

Answer 1

e.g. Finding:
- Amount of iron ore or iron supplement tablets
- Concentration of active chlorine in water samples
- Oxygen saturation in ecological studies
- Sulfur dioxide in wine
- Determination of copper (II), chlorate, hydrogen peroxide etc. in solution.

Question 2

Primary Standard

Answer 2

Accurately known concentration of solution by dissolving a measured mass of solid element in a known volume of water.

Question 3

Equilibrium

Question 4

Haber process

Answer 4

Two reactions happening simultaneously (reversible reaction).

Stage 1. Obtain reactants and mix them in a 3:1 ratio. We obtain nitrogen from fractional distillation of air and hydrogen from either natural gas CH4, cracking ethane or electrolysis of water.
Stage 2. Set conditions in the sealed container.
Stage 3. Cool reaction mixture so ammonia condenses and can be removed and collected.
Stage 4. The H2 and N2 gases are recycled back into the reaction vessel.

Question 5

Conditions required for the Haber Process

Answer 5

Iron catalyst
High temperature of 450 degrees C
High temperature of 200 atm

Question 6

Importance of Haber process

Answer 6

To produce liquid ammonia, which is an important chemical for making fertilisers.