Prac 4 - Types of chemical reaction

• Chemistry
• Secondary Education
• Age 12,13

Prac 2.4 - Types of chemical reactions

Topic 6. Chemical Energetics 

04 March 2024

• Describe different types of chemical reactions by making careful measurements
• Identify changes as chemical changes or physical changes
• Investigate energy changes in chemical reactions using the appropriate apparatus 

Our Learning Goals

• Combustion - an exothermic chemical reaction in which a substance reacts with oxygen
• Displacement reaction - a reaction in which a more reactive element displaces a less reactive element from a solution of its salt
• Photosynthesis - an endothermic chemical process by which the chlorophyll molecule of green plants absorb sunlight energy to make glucose from atmospheric carbon dioxide and water, giving off oxygen as a by-product
• Precipitation reaction - a reaction in which an insoluble salt forms from solutions of two suitable soluble salts

Keywords

Prac 2.4 - Types of chemical reactions

Topic 6. Chemical Energetics 

04 March 2024

• Standing up while performing any reactions involving heating.
• Be careful when heating the magnesium - do not look directly at the flame.
• Wear eye protection throughout.
• Silver nitrate solution is a moderate hazard and harmful to the aquatic environment. Waste from experiments using silver nitrate must not be poured down the drain.
• Copper (II) sulfate is a moderate hazard and harmful to the aquatic environment. Waste from experiments using copper (II) sulfate must not be poured down the drain.
• Copper (II) carbonate is harmful if swallowed, an irritant, and harmful to the aquatic environment. Waster from experiments using copper (II) carbonate must not be poured down the drain.

SAFETY ⚠️

Materials Checklist

Which among the 5 experiments does not show a chemical change?

Experimental Question

Write your team hypothesis or prediction.

Hypothesis

Prac 2.4 - Types of chemical reactions

Topic 6. Chemical Energetics 

04 March 2024

Follow the steps on pages 71 and 72 of your practical workbook.

Experiment Proper

• Standing up while performing any reactions involving heating.
• Be careful when heating the magnesium - do not look directly at the flame.
• Wear eye protection throughout.
• Silver nitrate solution is a moderate hazard and harmful to the aquatic environment. Waste from experiments using silver nitrate must not be poured down the drain.
• Copper (II) sulfate is a moderate hazard and harmful to the aquatic environment. Waste from experiments using copper (II) sulfate must not be poured down the drain.
• Copper (II) carbonate is harmful if swallowed, an irritant, and harmful to the aquatic environment. Waster from experiments using copper (II) carbonate must not be poured down the drain.

SAFETY ⚠️

• Wash the materials you used.
• Clean your table.
• Return the washed/ cleaned materials.

Clean-up

Prac 2.4 - Types of chemical reactions

Topic 6. Chemical Energetics 

04 March 2024

• Share the results of your experiment.
• What similarities and differences have you noticed?

Wrap-up