C8

Question 1

What is the rate of reaction

Answer 1

Rate of chemical reaction tells you how fast reactants turn into products.

Question 2

How can you work out the rate of a chemical reaction

Answer 2

You can find out how quickly the reactants are used up as they make products, or how quickly the products of the reaction are made

Question 3

How does the size of the peice of solid affect the rate of reaction?

Answer 3

Particles inside a large lump of solid are not in contact with the reactant particles in the solution, so they cannot react

Question 4

When can chemical reactions only occur

Answer 4

When a collision occurs with enough energy

Question 5

What can affect a chemical reaction

Answer 5

factor that increases the number of collisions between particles will increase the reaction rate

factor that decreases the number of collisions between particles will decrease the chemical reaction rate.

Question 6

How can temperature affect the rate of reactants

Answer 6

When you increase the temperature , it increases the rate of reaction

Question 7

How does changing the concertration affect the rate of reaction

Answer 7

Increasing concertration of reactants in a solution increases the rate of reaction because there are more particles of the reactants moving around in ths same volume of solution

Question 8

How does change in pressure affect the rate of gas phase reactions

Answer 8

Increasing pressure moves gas particles closer together, increasing the chances that they will collide and react

Question 9

What is a catalyst

Answer 9

Substance that changes the rate of a reaction

Question 10

How does a catalyst affect reaction

Answer 10

Speed up some reactions and reduce energy costs