Unit: 1 - rates of reactions

Question 1

What two things are required for a successful reaction to occur in collision theory?

Answer 1

1. Enough energy
2. Correct Orientation

Question 2

What are the 4 factors of rates of reactions?

Answer 2

1. concentration
2. particle size
3. temperature
4. use of a catalyst

Question 3

If the concentration was increased, would the rate of reaction(s) decrease or increase?

Answer 3

Rates of reaction can be increased by increasing the concentration of a reactant

Question 4

If we decreased the particle size, would the rate of reaction(s) decrease or increase?

Answer 4

Rates of reaction can be increased by decreasing the particle size (which increases the surface area) of a solid reactant.

Question 5

If we increased the temperature, would the rate of reaction(s) decrease or increase?

Answer 5

Rates of reaction can be increased by increasing the temperature of the reaction.

Question 6

If we used a catalyst in the reaction(s), would the rate of reaction(s) decrease or increase?

Answer 6

Rates of reaction can be increased by use of a catalyst. Catalysts are not changed during a chemical reaction and so can be recovered at the end unchanged.