Question Constellation Sign up for free AQA · GCSE · Chemistry
Chemical analysis
01.1 · 2 marks Sodium ion flame test Describe a test to identify sodium ions. Give the result of the test. 01.2 · 2 marks Chloride ion precipitation test Describe a test to identify chloride ions. Give the result of the test. 02.3 · 2 marks Oxygen gas identification test Describe the test for oxygen gas. Give the result if oxygen gas is present. 04.1 · 2 marks Chromatography dye separation distances Explain why the yellow dye and red dye travel different distances in Experiment 1. Refer to forces of attraction between the... 04.2 · 3 marks Solvent effects on chromatography The student used the same type of chromatography paper in Experiment 1 and in Experiment 2. Explain why the yellow dye is in... 04.3 · 2 marks Dye purity comparison by chromatography Compare the purity of the orange dyes A and B. Give reasons for your answer. Use Figure 4 and Figure 5. 04.4 · 3 marks Chromatography solvent-front distance calculation The student calculated that the Rf value of the orange dye in the experiment shown in Figure 5 was 0.48. Calculate the distance... 04.5 · 1 mark Rf ratio and solvent distance Why is the Rf value of a dye not affected by how far the solvent front is allowed to travel? 04.6 · 2 marks Gas chromatography method advantages Suggest two advantages of using the instrumental method of gas chromatography rather than paper chromatography.
AQA · GCSE · Chemistry
Using resources
01.3 · 1 mark Heating to constant mass Why did the student heat the evaporating dish and contents until the mass did not change? 01.4 · 1 mark Solid mass by subtraction How did the student calculate the mass of solid sodium chloride remaining after steps 1 to 5? Tick one box. 02.6 · 1 mark Ammonium nitrate uses Suggest one use of ammonium nitrate.
AQA · GCSE · Chemistry
Quantitative chemistry
AQA · GCSE · Chemistry
The rate and extent of chemical change
02.1 · 1 mark Ammonia recycling in Haber process Pipe P links the condenser to the reactor. Why is the condenser linked to the reactor? Use Figure 1. 02.2 · 1 mark Haber process catalyst selection Which metal is used as a catalyst in this reaction? 02.4 · 2 marks Catalysed reaction profile construction Complete the reaction profile for the catalysed reaction in Figure 2. Label the activation energy. Label the reactants and... 02.5 · 1 mark Catalyst effect on reaction profile How would Figure 2 be different if no catalyst was used? Tick one box. 03.1 · 2 marks Hydrogen combustion reaction classification Hydrogen gas reacts with oxygen gas to produce water. Water is decomposed into hydrogen gas and oxygen gas using electricity.... 03.2 · 1 mark Dynamic equilibrium reaction description Which sentence describes this reaction at equilibrium? Tick one box.
AQA · GCSE · Chemistry
Chemistry of the atmosphere
05.1 · 2 marks Nitrogen oxide formation during combustion Explain how oxides of nitrogen are produced when burning fuels. 05.2 · 2 marks Hydrogen fuel environmental benefits Explain one positive impact on the environment of burning hydrogen rather than natural gas as a fuel. Use Table 2. 05.3 · 2 marks Hydrogen fuel environmental drawbacks Explain one negative impact on the environment of burning hydrogen rather than natural gas as a fuel. Use Table 2.
AQA · GCSE · Chemistry