ExpertAQA GCSE
AQA GCSE Chemistry Higher Tier Paper 2
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AQA Higher Tier Exam-style past paper with complete mark schemes, hints, AI assistance and detailed explanations.
48
Questions
Hard
Difficulty
60%
Pass mark
Difficulty breakdown
Easy(22)
Medium(21)
Hard(4)
Topics covered
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Q01.1Easy2 marks
A student investigated an aqueous solution of a salt. The student identified that the salt solution contained only sodium ions and chloride ions.
Describe a test to identify sodium ions. Give the result of the test.
Q01.2Easy2 marks
Describe a test to identify chloride ions. Give the result of the test.
Q01.3Easy1 mark
The student determined the concentration of sodium chloride in the salt solution using this method:
- Weigh an empty evaporating dish.
- Add 25.0 cm³ of the salt solution into the evaporating dish.
- Heat the evaporating dish and contents.
- Weigh the evaporating dish and contents.
- Repeat steps 3 to 4 until there is no further change in mass.
- Repeat steps 1 to 5 three more times.
Why did the student heat the evaporating dish and contents until the mass did not change?
Q01.4Easy1 mark
How did the student calculate the mass of solid sodium chloride remaining after steps 1 to 5?
Q01.5Medium4 marks
The student calculated the concentration of sodium chloride in the salt solution. Table 1 shows the results.
The percentage by mass of sodium ions in sodium chloride is 39.3%.
Calculate the mean concentration of sodium ions in the salt solution.
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All questions (47)
Free to browse · no sign-up requiredQ01.1A student investigated an aqueous solution of a salt. The student identified that the salt solution contained only so...EasyQ01.2Describe a test to identify chloride ions. Give the result of the test.EasyQ01.3The student determined the concentration of sodium chloride in the salt solution using this method:
1. Weigh an empty...EasyQ01.4How did the student calculate the mass of solid sodium chloride remaining after steps 1 to 5?EasyQ01.5The student calculated the concentration of sodium chloride in the salt solution. Table 1 shows the results.
The perc...MediumQ02.1This question is about ammonia and nitric acid. In the Haber process ammonia is produced from nitrogen and hydrogen. ...EasyQ02.2Which metal is used as a catalyst in this reaction?EasyQ02.3Nitric acid is produced by reacting ammonia with oxygen. The word equation is:
ammonia + oxygen → water + nitric acid...EasyQ02.4Figure 2 represents the reaction profile of the catalysed reaction between ammonia and oxygen.
Complete the reaction ...MediumQ02.5How would Figure 2 be different if no catalyst was used?MediumQ02.6Ammonia and nitric acid react to produce the salt, ammonium nitrate. Ammonium ions and nitrate ions both contain nitr...EasyQ03.1This question is about water.
Hydrogen gas reacts with oxygen gas to produce water. Water is decomposed into hydrogen...EasyQ03.2Hydrogen gas reacts with oxygen gas to produce water. Water is decomposed into hydrogen gas and oxygen gas using elec...EasyQ03.3Water molecules break down into hydrogen ions and hydroxide ions.
The equation for the reaction is:
H₂O ⇌ H⁺ + OH⁻
Wh...EasyQ03.4Water collected from rivers is used in the home for drinking and flushing toilets. Water used in the home must be pot...HardQ04.1A student investigated an orange dye (A) using paper chromatography. Figure 4 shows the results of Experiment 1 and E...MediumQ04.2The student used the same type of chromatography paper in Experiment 1 and in Experiment 2.
Explain why the yellow dy...MediumQ04.3The student investigated a different orange dye (B). Figure 5 shows the results of Experiment 3 using orange dye B.
...EasyQ04.4The student calculated that the Rₑ value of the orange dye in the experiment shown in Figure 5 was 0.48.
Calculate th...MediumQ04.5Why is the Rₑ value of a dye not affected by how far the solvent front is allowed to travel?MediumQ04.6Another type of chromatography is called gas chromatography. Gas chromatography is an instrumental method of chemical...EasyQ05.1This question is about burning fuels in central heating boilers. In the future, gas central heating boilers may burn ...MediumQ05.2Explain one positive impact on the environment of burning hydrogen rather than natural gas as a fuel. Use Table 2.EasyQ05.3Explain one negative impact on the environment of burning hydrogen rather than natural gas as a fuel. Use Table 2.MediumQ05.4Air is 20% oxygen.
Calculate the volume of air needed to provide enough oxygen to react with 3.50 dm³ of hydrogen gas...MediumQ05.5Central heating boilers can also burn kerosene.
Kerosene is produced from crude oil in a fractionating column using f...MediumQ06.1This question is about materials used to make bicycles. Table 3 shows information about two materials used to make bi...HardQ06.2Explain why aluminium alloy bicycle frames do not need protection from corrosion.MediumQ06.3Bicycle chains are made from an alloy of iron. Bicycle chains rust without protection. Paint is not used to protect b...EasyQ06.4Bicycle frames can also be made from a composite of carbon fibres embedded in a polymer resin.
What description is gi...MediumQ07.1This question is about sulfuric acid. Sulfuric acid contains sulfate ions.
Describe the test for the presence of sulf...EasyQ07.2One stage in the industrial production of sulfuric acid is the reaction of sulfur dioxide with oxygen to produce sulf...MediumQ07.3The equation for the reaction is:
2SO₂(g) + O₂(g) ⇌ 2SO₃(g)
Explain why the percentage yield of sulfur trioxide in th...MediumQ07.4In industry, the reaction is done at 450 °C and atmospheric pressure. Under these conditions the yield of sulfur trio...MediumQ07.5This reaction uses a catalyst to increase the rate of the reaction. The catalyst is a metal oxide.
Which is the most ...EasyQ08.1This question is about monomers and polymers. Compound A has an alkene functional group and an ester functional group...EasyQ08.2Describe what will be seen when compound A is shaken with bromine water.EasyQ08.3Figure 9 is a repeat of Figure 8. Draw a circle around the ester functional group on Figure 9.EasyQ08.4Compound A has the formula C₄H₆O₂. Compound A is flammable.
Write a balanced equation for the complete combustion of ...MediumQ08.5Many molecules of compound A join together to form polymer B.
Complete the displayed formula equation which represent...MediumQ08.6What type of polymer is polymer B?EasyQ08.7Polymer B is a polymer which melts when heated.
What word is used to describe polymers which melt when heated?EasyQ08.8Explain why some polymers do not melt when heated.MediumQ09.1A student investigated the rate of the reaction between zinc and sulfuric acid. The equation for the reaction is: Zn(...MediumQ09.2Figure 11 shows the volumes of hydrogen collected in the 50 cm³ measuring cylinder after 40 seconds and after 100 sec...HardQ09.3A different student investigated how the concentration of sulfuric acid affected the rate of the reaction. The studen...HardQ09.4The student repeated the experiment using 0.20 mol/dm³ sulfuric acid instead of 0.40 mol/dm³ sulfuric acid. Excess zi...Medium