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CHEMISTRY REVISION FORM 1 Oxygen preparation ,properties and uses
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AIR AND COMBUSTION
EXAMINATION CONTENT AND TIPS (CHECK LIST FOR YOUR REVISION)
1. Experiment to determine the active part of air.
The active part of air is oxygen. The percentage of oxygen in the atmospheric air can be determined using the following experiments;
• Using a burning candle
• Using smoldering phosphorous
• Burning copper metal in air
• Rusting of iron fillings.
What is tested? The learner should be able to:
State and explain the observations made during the experiments.
Calculate the percentage of active part air used in combustion.
Write a chemical equation for the reaction that took place.
State the sources of errors in the experiment.
State the precautions (if any) taken during the experiment.
Draw a diagram of any of the experimental set up above
2. Preparation of oxygen gas (refer to preparation of gases)
3. Rusting
Conditions necessary for rusting (draw and experimental set-up)
Method of preventing rusting(be able to draw or explain an experiment set-up)
State the conditions necessary for rusting
EXAMINATION CONTENT AND TIPS (CHECK LIST FOR YOUR REVISION)
1. Experiment to determine the active part of air.
The active part of air is oxygen. The percentage of oxygen in the atmospheric air can be determined using the following experiments;
• Using a burning candle
• Using smoldering phosphorous
• Burning copper metal in air
• Rusting of iron fillings.
What is tested? The learner should be able to:
State and explain the observations made during the experiments.
Calculate the percentage of active part air used in combustion.
Write a chemical equation for the reaction that took place.
State the sources of errors in the experiment.
State the precautions (if any) taken during the experiment.
Draw a diagram of any of the experimental set up above
2. Preparation of oxygen gas (refer to preparation of gases)
3. Rusting
Conditions necessary for rusting (draw and experimental set-up)
Method of preventing rusting(be able to draw or explain an experiment set-up)
State the conditions necessary for rusting
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