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
The metal that reacts when added to cold water is calcium. This is because calcium is more reactive than magnesium, aluminium, zinc, iron, copper, silver, and gold. The others do not react with cold water.
Step 2
Predict the observations for the reactions of magnesium and of iron with dilute hydrochloric acid.
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Answer
For magnesium, vigorous bubbles will be produced quickly, and the test tube will feel warm/warm or hotter than with zinc as magnesium is more reactive than zinc. For iron, moderate bubbles will be produced, and the test tube will feel slightly warm. This is due to iron's lower reactivity compared to magnesium.
Step 3
Describe the test to show that the gas is hydrogen.
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Answer
To test for hydrogen gas, you can bring a lit splint close to the mouth of the test tube containing the gas. If the gas is hydrogen, it will produce a distinctive 'pop' sound upon ignition. This indicates the presence of hydrogen.
