Rates of Reaction

Question 1

What are the four factors that affect the rate of a chemical reaction?

Answer 1

1. Temperature.
2. Concentration.
3. Particle Size.
4. Catalyst.

Question 2

What is a Catalyst?

Answer 2

A catalyst is a substance that increases the rate of a chemical reaction without being used up or altered in the reaction.

Question 3

How does Particle Size affect the Rate of a Reaction?

Answer 3

The smaller the particle size the higher the surface area. The higher the surface area the greater the number of collisions that can occur at any one time. The greater the number of collisions the faster the reaction.

Question 4

How does Concentration affect the Rate of a Reaction?

Answer 4

The higher the concentration the higher the number of particles. The higher the number of particles the greater the chance of collisions that can occur. the greater the number of collisions the faster the reaction.

Question 5

How does Temperature affect the Rate of Reaction?

Answer 5

The higher the Temperature the higher the energy the particles have. The higher the energy the faster the particles move. The faster the particles move the greater the chance that they will collide. The greater the number of collisions the faster the reaction.

Question 6

What is an example of how Catalyst are used?

Answer 6

Catalytic converters are used in exhaust systems to turn harmful gases into less harmful gases.

Question 7

What are the two most common ways to monitor the course of a reaction?

Answer 7

1. Measuring the volume of gas produced.
2. Measuring the change in mass

Question 8

How can you tell a reaction has happened?

Answer 8

1. Colour Change
2. Precipitate (solid had formed)
3. Gas Produced
4. Heat Produced.