Dissolve 40 g of sodium hydroxide pellets in water and make up to 500 mL. This is a 2M
solution Also prepare 500 mL of a 2M hydrochloric acid solution. Leave the solutions to cool
to room temperature. Note the actual temperature of the solutions when cool. Then add the
acid to the base quite rapidly and stir with a thermometer. Note the maximum temperature
reached. The increase of temperature should be about 13oC.
(iii) Since the volume of water has been doubled by adding one solution to the other, the
final solution contains 1 mole of OH- (aq) ions which reacted with 1 mole of H+(aq) ions to form 1 mole of water molecules. We must assume that the specific heat of this moderately
weak solution is the same as that of water.
sharon kalunda answered the question on April 12, 2019 at 08:59
- Describe an experiment which shows that some chemical reactions take in heat from the surrounding.(Solved)
Describe an experiment which shows that some chemical reactions take in heat from the surrounding.
Date posted: April 12, 2019. Answers (1)
- Give an experimental procedure to show that some chemical reactions gives out heat.(Solved)
Give an experimental procedure to show that some chemical reactions gives out heat.
Date posted: April 12, 2019. Answers (1)
- Explain how soap is made from fats.(Solved)
Explain how soap is made from fats.
Date posted: April 12, 2019. Answers (1)
- Explain how titration of acids and bases is done in the laboratory.(Solved)
Explain how titration of acids and bases is done in the laboratory.
Date posted: April 12, 2019. Answers (1)
- Describe how magnesium metal reacts with carbon dioxide.(Solved)
Describe how magnesium metal reacts with carbon dioxide.
Date posted: April 12, 2019. Answers (1)
- Explain potassium permanganate is reduced by sulphur dioxide.(Solved)
Explain potassium permanganate is reduced by sulphur dioxide.
Date posted: April 12, 2019. Answers (1)
- How is sulphur dioxide prepared in the laboratory?(Solved)
How is sulphur dioxide prepared in the laboratory?
Date posted: April 12, 2019. Answers (1)
- Describe an experiment to show how hydrogen is displaced from acids by different metals.(Solved)
Describe an experiment to show how hydrogen is displaced from acids by different metals.
Date posted: April 12, 2019. Answers (1)
- Describe how sodium reacts with water.(Solved)
Describe how sodium reacts with water.
Date posted: April 12, 2019. Answers (1)
- Describe an experiment to show how copper is displaced from aqueous solution of copper ions.(Solved)
Describe an experiment to show how copper is displaced from aqueous solution of copper ions.
Date posted: April 12, 2019. Answers (1)
- Describe the electrolysis of water.(Solved)
Describe the electrolysis of water.
Date posted: April 12, 2019. Answers (1)
- Describe the electrolysis of solutions of ionic salts.(Solved)
Describe the electrolysis of solutions of ionic salts.
Date posted: April 12, 2019. Answers (1)
- Describe the electrolysis of lead bromide.(Solved)
Describe the electrolysis of lead bromide.
Date posted: April 12, 2019. Answers (1)
- Describe how electrolysis is used to determine the salts which conduct electricity in solution form.(Solved)
Describe how electrolysis is used to determine the salts which conduct electricity in solution form.
Date posted: April 12, 2019. Answers (1)
- Describe an experiment to show that some liquids conducts electricity.(Solved)
Describe an experiment to show that some liquids conducts electricity.
Date posted: April 12, 2019. Answers (1)
- Explain how to identify Solids that conduct electricity in the laboratory.(Solved)
Explain how to identify Solids that conduct electricity in the laboratory.
Date posted: April 12, 2019. Answers (1)
- Describe an experiment to estimate the size of an oil molecule.(Solved)
Describe an experiment to estimate the size of an oil molecule.
Date posted: April 12, 2019. Answers (1)
- Describe an experiment to show how diffusion in liquids occurs.(Solved)
Describe an experiment to show how diffusion in liquids occurs.
Date posted: April 12, 2019. Answers (1)
- Explain how the diffusion rates of ammonia and hydrogen chloride gases can be compared.(Solved)
Explain how the diffusion rates of ammonia and hydrogen chloride gases can be compared.
Date posted: April 12, 2019. Answers (1)
- Describe an experiment to show how diffusion of a heavy carbon dioxide gas occur in an upward direction.(Solved)
Describe an experiment to show how diffusion of a heavy carbon dioxide gas occur in an upward direction.
Date posted: April 12, 2019. Answers (1)