JSSS
Student
To investigate the ability of (i) ionic and covalent substances and (ii)
solutions of these substances to conduct electricity
OC 44
You have been given two ionic solids and two covalent solids, and purified water, which is
covalent. You have also been given solutions of three of the solids.
Preparation and planning
1. What exactly do you want to find out in your investigation?
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2. Predict what will happen in your investigation.
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3. What material/equipment will you need?
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4. Draw a diagram of the electrical circuit you are going to use.
5. What are you going to measure?
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6. How are you going to measure it?
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7. How many measurements are you going to take?
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8. How often will you need to repeat the measurements?
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9. What variables are involved?
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10. Which is the variable you are going to change?
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JSSS
Student
11. Which is the variable that will change as a result?
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12. How will you keep all the other variables constant?
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13. How will you present your results?
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14. What safety precaution(s) will you take?
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Carrying out the investigation
1. Use your plan to write down the procedure for the investigation.
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2. Record your results in the way that you decided at the planning stage of the investigation.
Interpreting and evaluating the data, and drawing conclusions
1. What did you find out?
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2. Is this what you expected to happen?
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3. Can you explain why this happened?
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4. Are the results reproducible?
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5. Has this been a fair test?
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