Chemistry Paper 3 June 2024 Foundation tier, Question 7 1 mark
Which row describes a formulation ?
| Description | Amount of chemicals | |
| A | compound | exact |
| B | mixture | exact |
| C | compound | random |
| D | mixture | random |
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Topic questions Chemical analysis Formulations
Formulations
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Chemistry Paper 9 June 2022 Higher tier, Question 4 1 mark
Which substance is an example of a formulation ?
A A macromolecule
B A metal
C An alloy
D An ionic compound
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Chemistry Paper 3 November 2021 Foundation tier, Question 4 1 mark
Which substance is a formulation ?
A Air
B An alloy
C Carbon dioxide
D Distilled water
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Chemistry Paper 9 November 2021 Higher tier, Question 13 11 marks
Solder is a mixture of lead and tin. Solder can be used to join two electrical wires together as shown in Fig. 13.1.
Electrical wire
The table shows how the melting point of solder changes with the percentage of tin it contains.
| Percentage of tin in solder (%) | Melting point (°C) |
| 0 | 320 |
| 20 | 280 |
| 40 | 240 |
| 80 | 220 |
| 90 | 230 |
| 100 | 240 |
(a)
[2]
Plot the data on the grid shown in Fig. 13.2.
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(b)(i)
[1]
On Fig. 13.2 draw a line of best fit through the first three points and a second line of best
fit through the last two points.
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(b)(ii)
[2]
Use the lines of best fit to work out the percentage of tin in solder with the lowest melting point.
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(c)
[2]
Solder conducts electricity like a typical metal.
Explain why.
Use knowledge of the properties of metals in your answer.
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(d)
Look at Fig. 13.3. It shows how the atoms are arranged in pure lead and in solder.
(d)(i)
[1]
Solder is an example of a formulation.
What name is given to a formulation which is a mixture of metals such as solder?
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(d)(ii)
[3]
Suggest whether solder is harder, softer or the same hardness as pure lead.
Explain your answer using your knowledge of the properties of metals.
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Chemistry Paper 9 November 2020 Higher tier, Question 11 6 marks
People use perfumes to make them smell nice.
Look at the table. It shows the percentages of the different ingredients in a perfume.
| Ingredient | Percentage (%) |
| fragrance | 5.2 |
| alcohol | 74.8 |
| colour | 0.5 |
| UV filter | 0.5 |
| water | added to make up to 100% |
(a)
[1]
What is the name given to a mixture, such as perfume, where the ingredients are combined in exact amounts?
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(b)
[2]
A bottle contains 25 g of the perfume.
Calculate the mass of water in 25 g of the perfume.
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(c)
(c)(i)
[1]
Suggest why the alcohol evaporates very quickly.
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(c)(ii)
[2]
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Chemistry Paper 9 June 2019 Higher tier, Question 2 1 mark
Metals can have atoms of other elements mixed with them to change their properties.
What is the name for the type of substance formed?
A Alloy
B Compound
C Solution
D Suspension
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