C8.1 Rate of Reaction

Question 1

What is the chemical rate of reaction?

Answer 1

Tells how how fast reactants turn into products

Question 2

How can you work out the the rate of reaction?

Answer 2

How quickly the reactants are used up as they make products

How quickly the products of the reaction are made

Question 3

How can you measure the rate at which the mass of a reaction mixture changes?

Answer 3

By measuring the amount of gas

Question 4

Explain the processes of measuring the decreasing mass of a reaction mixture?

Answer 4

As the reaction takes place, the mass of the reaction mixture decreases
You can measure and record the mass at regular time intervals
You can add marble ships and hydrochloric acid to see observe the decreasing mass of the reaction

Question 5

What is the purpose of the cotton wool?

Answer 5

To allow air to escape

Question 6

How else can you measure the rate of reaction?

Answer 6

If a reaction produces a gas - you can use the gas to find out the rate of the reaction
You can do this by collecting the gas and measure the volume given off at time intervals using a gas syringe

Question 7

How else can you measure the rate of the reaction by using light?

Answer 7

Some reactions in solution make a suspension of an insoluble solid
This makes the solution go cloudy
You can see the amount light visible decreases

Question 8

How can you calculate the rate of reaction at a specific time?

Answer 8

Draw the tangent to the curve