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Mixtures of substances can be separated using different techniques - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2019 - Paper 1
Question 2
2
Mixtures of substances can be separated using different techniques.
(a) Which of the following is a mixture of substances?
A air
B carbon dioxide
C gold
D titani... show full transcript
Worked Solution & Example Answer:2
Mixtures of substances can be separated using different techniques - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2019 - Paper 1
Step 1
Which of the following is a mixture of substances?
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Answer
The only correct answer is A: air. Air is a mixture of various gases, including oxygen, nitrogen, and carbon dioxide.
Step 2
Give a reason why the bulb of the thermometer should be level with the side arm.
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Answer
The bulb of the thermometer should be level with the side arm to accurately measure the temperature of the vapor passing into the condenser. If the bulb is too low, it won't accurately reflect the boiling point of the liquid, as it will be measuring the temperature of the liquid rather than the vapor.
Step 3
List the steps in the correct order.
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Answer
Put solvent in the beaker.
Draw a start line on the piece of paper.
Place the paper in the beaker.
Leave the solvent to rise up the paper.
Remove the paper when the solvent is near the top.
