Question Constellation Sign up for free AQA · GCSE · Chemistry
The rate and extent of chemical change
AQA · GCSE · Chemistry
Organic chemistry
01.1 · 1 mark Balancing propane combustion Balance the equation for the combustion of propane. C3H8 + O2 → 3 CO2 + 4 H2O 01.5 · 3 marks Testing for an alkene Propene is an alkene. Describe the test for alkenes. Give the colour change in the test. Test Colour change to 07.1 · 4 marks Separating crude oil into fractions Hydrocarbon fuels are produced from crude oil. Describe how crude oil is separated into fractions. Butane is a hydrocarbon. 01.4 · 1 mark General formula for alkanes Methane (CH4) is an alkane. What is the general formula for alkanes? Tick one box. CnHn CnH2n CnH2n–2 CnH2n+2 01.5 · 1 mark Balancing methane combustion Alkanes burn in oxygen. Balance the equation for methane burning. CH4 + O2 → CO2 + H2O
AQA · GCSE · Chemistry
Quantitative chemistry
01.5 · 3 marks Solution concentration calculation A solution of hydrochloric acid contains 3.2 g of hydrogen chloride in 50 cm3 Calculate the concentration of hydrogen chloride... 08.3 · 5 marks Reacting mass calculation 0.120 g of magnesium reacts with excess iron chloride solution. Relative atomic masses (Ar): Mg = 24 Fe = 56 Calculate the mass... 05.2 · 4 marks Hydrogen mass for ammonia Calculate the mass of hydrogen that is needed to produce 25 g of ammonia. 01.3 · 4 marks Mass of copper in an alloy Calculate the mass of copper in the 5.25 g sample. Give your answer to 3 significant figures. 02.4 · 3 marks Plotting thermal decomposition data Plot the data from Table 1 on Figure 5. Draw a line of best fit. 02.5 · 1 mark Mass loss during decomposition Why does the mass of the contents of the test tube decrease in mass when copper carbonate is thermally decomposed?
AQA · GCSE · Chemistry
Bonding, structure, and the properties of matter
04.1 · 1 mark State symbol for chlorine at room temperature Write the state symbol for chlorine at room temperature. Cl2 ( ) 01.2 · 3 marks Alloy structure and hardness Explain why the alloy of copper and zinc is harder than pure copper. Use Figure 2. 03.1 · 6 marks Comparing sodium chloride and oxygen Compare the structure and bonding of sodium chloride and oxygen.
AQA · GCSE · Chemistry
Atomic structure and the periodic table
08.2 · 1 mark Separating iron from a mixture Suggest how any unreacted iron can be separated from the mixture. Magnesium reacts with iron chloride solution. 3 Mg + 2 FeCl3 ... 07.1 · 4 marks Forming calcium chloride ions Explain what happens to calcium atoms and to chlorine atoms when calcium reacts with chlorine to produce calcium chloride.
AQA · GCSE · Chemistry
Chemical changes
04.3 · 1 mark Hydrogen ion concentration change How does the hydrogen ion concentration change? Tick one box. 02.1 · 1 mark Acid for copper sulfate What is the formula of the acid used to prepare copper sulfate? Tick one box. 02.2 · 1 mark Using excess copper carbonate Why is excess copper carbonate used in stage 1? 02.3 · 2 marks Producing copper sulfate crystals Describe how the student could produce copper sulfate crystals from the copper sulfate solution in beaker N.
AQA · GCSE · Chemistry
Energy changes
AQA · GCSE · Chemistry