2 Figure 2 shows part of the reactivity series of metals - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2023 - Paper 1
Question 2
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 ... show full transcript
Worked Solution & Example Answer: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 calcium. It is the only metal in the options provided that can react with cold water to produce hydrogen gas and a hydroxide.
Step 2
magnesium
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Answer
When magnesium reacts with dilute hydrochloric acid, the observations would include:
Rapid bubbling / vigorous bubbles produced quickly due to the release of hydrogen gas.
The test tube will feel warm due to the exothermic nature of the reaction.
Step 3
iron
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Answer
When iron reacts with dilute hydrochloric acid, the observations would include:
Moderate bubbling produced at a steady rate, indicating a slower reaction compared to magnesium.
The test tube will feel warm, but not as hot as with magnesium.
Step 4
Describe the test to show that the gas is hydrogen.
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Answer
To test if the gas is hydrogen, bring a lit splint close to the gas. If it is hydrogen, there will be a 'pop' sound as the gas ignites.
