Speed of Chemical Reactions - Prac Report
The speed of chemical reactions – class experiment
By Julia Shuker
Year 10 science – Miss Phillips – Term 2 – 2013 – Julia Shuker
Aim
The aim of the experiment was to investigate the factors that increased or decreased the speed of chemical reactions between two different chemical reactions.
Hypothesis
If certain factors, such as concentration, temperature, catalyst and surface area are increased then the reaction rate will also increase due to the particles colliding together faster, speeding up the chemical reaction.
Materials
• 6 test tubes and rack
• Test tube holder
• Bunsen burner
• Hydrochloric acid 0.1M
• Copper sulphate solution 0.5M
• Bunsen burner
Method
Diagrams of the set up for experiments: 1, 2 and 3
Experiment 1
1. Pour about 1cm of hydrochloric acid into each test tube
2. Drop a piece of zinc into each of the first two test tubes. Reduce the concentration of the hydrochloric acid in the second test tube by adding water until it is half-full.
3. Compare the speeds of the reactants in the two test tubes and record your observations in the table.
Experiment 2
1. Drop a piece of zinc into each of the third and fourth test tubes. Add water to both test tubes until they are both half-full.
2. Light the Bunsen burner and adjust the flame until it is just blue. Heat the top half of the solution in the fourth test tube but stop before it boils.
3. Compare the speeds of the reactions in the third and fourth test tubes. Record your observations in the table.
Experiment 3
1. Drop a piece of zinc into each of the last two test tubes. Half-fill the fifth test tube with water and half-fill the sixth test tube with copper sulphate solution.
2. Compare the speed of the reactions in the last two test tubes. Record your observations in the table
Results
|Reactants |Zinc and
By Julia Shuker
Year 10 science – Miss Phillips – Term 2 – 2013 – Julia Shuker
Aim
The aim of the experiment was to investigate the factors that increased or decreased the speed of chemical reactions between two different chemical reactions.
Hypothesis
If certain factors, such as concentration, temperature, catalyst and surface area are increased then the reaction rate will also increase due to the particles colliding together faster, speeding up the chemical reaction.
Materials
• 6 test tubes and rack
• Test tube holder
• Bunsen burner
• Hydrochloric acid 0.1M
• Copper sulphate solution 0.5M
• Bunsen burner
Method
Diagrams of the set up for experiments: 1, 2 and 3
Experiment 1
1. Pour about 1cm of hydrochloric acid into each test tube
2. Drop a piece of zinc into each of the first two test tubes. Reduce the concentration of the hydrochloric acid in the second test tube by adding water until it is half-full.
3. Compare the speeds of the reactants in the two test tubes and record your observations in the table.
Experiment 2
1. Drop a piece of zinc into each of the third and fourth test tubes. Add water to both test tubes until they are both half-full.
2. Light the Bunsen burner and adjust the flame until it is just blue. Heat the top half of the solution in the fourth test tube but stop before it boils.
3. Compare the speeds of the reactions in the third and fourth test tubes. Record your observations in the table.
Experiment 3
1. Drop a piece of zinc into each of the last two test tubes. Half-fill the fifth test tube with water and half-fill the sixth test tube with copper sulphate solution.
2. Compare the speed of the reactions in the last two test tubes. Record your observations in the table
Results
|Reactants |Zinc and