Figure 2 shows part of the reactivity series of metals - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2023 - Paper 1
Question 2
Figure 2 shows part of the reactivity series of metals.
calcium
magnesium
aluminium
zinc
iron
copper
silver
gold
increasing reactivity
Figure 2
(a) Which metal r... show full transcript
Worked Solution & Example Answer:Figure 2 shows part of the reactivity series of metals - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2023 - Paper 1
Step 1
Which metal reacts when added to cold water?
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Answer
Calcium is the only metal that reacts with cold water from the options provided. This is because it is higher in the reactivity series compared to copper, silver, and gold, which do not react with cold water.
Step 2
Use the information in Figure 2 and in Figure 3 to predict the observations for the reactions of magnesium and iron with dilute hydrochloric acid.
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Answer
Magnesium reacts vigorously with dilute hydrochloric acid. The expected observations are:
Magnesium: Many bubbles produced quickly, indicating a rapid reaction. The test tube will feel warm due to the exothermic nature of the reaction.
For Iron: The reaction is slower than that of magnesium, but it will still produce some bubbles. The expected observation is:
Iron: Bubbles produced slowly, with the test tube feeling slightly warm.
Step 3
Describe the test to show that the gas is hydrogen.
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Answer
To test for hydrogen gas, bring a lit splint close to the mouth of the test tube where the gas is being produced. If hydrogen is present, it will ignite with a 'pop' sound, indicating the production of hydrogen gas.
