Mixtures of substances can be separated using different techniques - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2019 - Paper 1
Question 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 titanium
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Worked Solution & Example Answer: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 composed of various gases, making it a mixture.
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 water vapor passing into the condenser. If the bulb is too low, it may not be in the correct position to measure the vapor temperature, leading to inaccurate readings.
Step 3
List the steps in the correct order.
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Answer
3 draw a start line on the piece of paper
2 put solvent in the beaker
4 place the paper in the beaker
1 leave the solvent to rise up the paper
5 remove the paper when the solvent is near the top
