Rates Of Reaction

Question 1

What four things do the rate of reaction depend on?

Answer 1

1. Temperature
2. Concentration/Pressure
3. Surface Area
4. Catalyst

Question 2

What happens when you increase the temperature for a rate of reaction?

Answer 2

The particles move faster so there are more collisions so the rate increases.

Question 3

What happens when you increase the concentration/pressure for a rate of reaction?

Answer 3

There are more particles so there are more collisions so the rate increases.

Question 4

What happens when you increase the surface area for a rate of reaction?

Answer 4

The particles are more available so there are more collisions so the rate increases.

Question 5

What happens when you use a catalyst for the rate of reactions?

Answer 5

A catalyst speeds up the rate of any reaction without getting used up.

Question 6

How do we measure the rate of reaction?

Answer 6

1. Precipitation reactions (how quickly it disappears)
2. Change in mass (how quickly mass falls)
3. Measuring the volume of gas given off. ( how quickly gas is produced in a syringe)

Question 7

What happens in a precipitation reaction?

Answer 7

The quicker the mark disappears, the quicker the reaction.

Question 8

What happens in a change in mass experiment?

Answer 8

An acid and a metal (magnesium and hydrochloric acid) are placed in a beaker and (hydrogen) gas should be released into the room. This process happens in a fume cupboard and you check the mass balance.

Question 9

What happens in a experiment measuring the volume of gas given off?

Answer 9

You put the reactants (acid and metal carbonate) into a beaker and CO2 is given off into the gas syringe where we can measure the amount of gas. The more the gas, the faster the reaction.