Figure 9 shows the percentage of three gases, X, Y and Z, in the Earth's early atmosphere - Edexcel - GCSE Chemistry - Question 5 - 2023 - Paper 2
Question 5
Figure 9 shows the percentage of three gases, X, Y and Z, in the Earth's early atmosphere.
percentage of gas in
Earth's early atmosphere
percentage of ga... show full transcript
Worked Solution & Example Answer:Figure 9 shows the percentage of three gases, X, Y and Z, in the Earth's early atmosphere - Edexcel - GCSE Chemistry - Question 5 - 2023 - Paper 2
Step 1
What is the name of gas Z?
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Answer
Gas Z is carbon dioxide. It is thought to be the gas with the highest percentage in Earth's early atmosphere.
Step 2
State what piece of equipment the student could use to measure the pH of each liquid.
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The student could use a pH meter or pH indicator paper to measure the pH of each liquid accurately.
Step 3
Explain one improvement that the student could make to the method to make the results more valid.
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One improvement could be to perform the experiment with multiple trials to ensure reliability of results. This would involve repeating the entire procedure several times and averaging the outcomes to minimize anomalies.
