Topic 1 - Rates of reaction

Question 1

What can be measured to follow the progress of chemical reactions

Answer 1

changes in mass, volume and other
Quantities can be measured

Question 2

Graphs can then be drawn and interpreted in terms of

Answer 2

• end-point of a reaction
• quantity of product
• quantity of reactant used
• effect of changing conditions

Question 3

Rates of reaction can be increased by

Answer 3

• increasing the temperature
• increasing the concentration of a reactant
• by increasing surface area/decreasing particle size
• through the use of a catalyst

Question 4

Catalysts are

Answer 4

substances that can speed up chemical reactions, but are not used up in the process

Question 5

The average rate of a chemical reaction equation

Answer 5

rate = change in quantity/change in time

Question 6

The rate of reaction can be shown to decrease over time by

Answer 6

calculating the average rate
at different stages of the reaction.