F = Rates of reaction

Question 1

7 properties that affect the rate of a chemical reaction

Answer 1

• Temperature
• Concentration
• Catalyst
• Surface area
• Pressure (gases)
• pH
• Light intensity

Question 2

Gradient of a graph = ?

Answer 2

delta y / delta x

Question 3

Describe an experiment to investigate the affect of varying temperature on the rate of a chemical reaction

Do the same for the affect of concerntration

Answer 3

CROSS DISAPPEARING EXPERIMENT

1-Measure a fixed volume of you solution e.g. 10cm^2 of Sodium thiosulphate (Na2S2O3) and fixed volume of water e.g. 40cm^3

2-Add 5cm^3 of HCL in the conical flask

3-Measure the initial temperature of the solution and start the stop watch

4-Record time for the cross to disappear

5-Repeat the experiment (without changing any of the measurements) at different temperatures

You can vary the temperature using a bunsen burner

For concentration you do the same thing but the temperature becomes constant and you vary the amount of water you add

Question 4

Difference between a catalyst and a catalase

Answer 4

Catalases are enzymes where as catalysts are not

Question 5

Equipment used to measure the amount of gas produced (2)

Answer 5

• Either collected over water

- Gas syringe