**Question 2**
Figure 2 shows part of the reactivity series of metals - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2023 - Paper 1
Question 2
**Question 2**
Figure 2 shows part of the reactivity series of metals.
calcium
magnesium
aluminium
zinc
iron
copper
silver
gold
increasing reactivi... show full transcript
Worked Solution & Example Answer:**Question 2**
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 with cold water is A calcium. Calcium is reactive enough to displace hydrogen from water, unlike the other options (copper, gold, silver), which do not react.
Step 2
magnesium
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Answer
When magnesium is added to dilute hydrochloric acid, it reacts vigorously and produces many bubbles quickly. The test tube will feel warm due to the exothermic reaction.
Step 3
iron
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Answer
When iron is added to dilute hydrochloric acid, the reaction is less vigorous than with magnesium. The test tube may feel slightly warm, and some bubbles will be produced but at a slower rate compared to magnesium.
Step 4
Describe the test to show that the gas is hydrogen.
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Answer
To test for hydrogen gas, you can bring a lighted splint near the gas. If hydrogen is present, it will produce a characteristic popping sound, indicating the presence of hydrogen.
