Prac 4 - Types of chemical reaction

Prac 2.4 - Types of chemical reactions
Topic 6. Chemical Energetics 
04 March 2024
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ChemistrySecondary EducationAge 12,13

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Prac 2.4 - Types of chemical reactions
Topic 6. Chemical Energetics 
04 March 2024

Slide 1 - Diapositive


  • 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

Slide 2 - Diapositive


  • 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

Slide 3 - Diapositive

Prac 2.4 - Types of chemical reactions
Topic 6. Chemical Energetics 
04 March 2024

Slide 4 - Diapositive


  • 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 ⚠️

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Materials Checklist

Slide 6 - Diapositive


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

Slide 7 - Diapositive

Write your team hypothesis or prediction.
Hypothesis

Slide 8 - Diapositive

Prac 2.4 - Types of chemical reactions
Topic 6. Chemical Energetics 
04 March 2024

Slide 9 - Diapositive


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

Slide 10 - Diapositive


  • 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 ⚠️

Slide 11 - Diapositive


  • Wash the materials you used.
  • Clean your table.
  • Return the washed/ cleaned materials.
Clean-up
timer
7:00

Slide 12 - Diapositive

Prac 2.4 - Types of chemical reactions
Topic 6. Chemical Energetics 
04 March 2024

Slide 13 - Diapositive


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

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