Plan an investigation to find the order of reactivity of three metals - AQA - GCSE Chemistry Combined Science - Question 3 - 2022 - Paper 1
Question 3
Plan an investigation to find the order of reactivity of three metals.
You should use the temperature change when each metal reacts with hydrochloric acid.
Worked Solution & Example Answer:Plan an investigation to find the order of reactivity of three metals - AQA - GCSE Chemistry Combined Science - Question 3 - 2022 - Paper 1
Step 1
Measure volume of (hydrochloric) acid
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Answer
Determine a suitable volume to be used in the experiment, typically around 50 mL, and pour it into a suitable container such as a polystyrene cup.
Step 2
Measure the initial temperature of (hydrochloric acid)
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Answer
Use a thermometer to record the initial temperature of the hydrochloric acid before adding the metal.
Step 3
Add selected metal
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Answer
Weigh out a piece of the first metal to be tested, ensuring it has the same mass each time for consistency. Add the metal to the hydrochloric acid.
Step 4
Stir the solution
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Gently stir the solution to ensure thorough mixing of the acid and metal, allowing the reaction to proceed evenly.
Step 5
Measure the highest temperature reached
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Answer
Monitor the temperature throughout the reaction and record the highest temperature reached after a set time period.
Step 6
Repeat for other metals
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Answer
Perform the same procedure with two other metals, ensuring they are in the same physical state and have the same mass as used previously. Keep the volume and concentration of hydrochloric acid consistent.
Step 7
Determine the order of reactivity
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Answer
Compare the temperature changes recorded for each metal. The metal that produces the most significant temperature increase is the most reactive.
