Question Constellation Sign up for free 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
Organic chemistry
AQA · GCSE · Chemistry
Bonding, structure, and the properties of matter
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. 05.1 · 2 marks Ammonia dot-and-cross diagram Complete the dot and cross diagram for an ammonia molecule.
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. 04.1 · 1 mark Meaning of strong acid What is meant by a ‘strong acid’? 04.2 · 1 mark Meaning of dilute aqueous solution What is meant by ‘dilute aqueous solution’? 04.4 · 1 mark Ionic equation for neutralisation Write the ionic equation for the reaction between an acid and an alkali. 04.6 · 1 mark Universal indicator colour What colour was the solution after the addition of universal indicator? Tick one box.
AQA · GCSE · Chemistry
Quantitative chemistry
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? 04.5 · 1 mark Mole ratio from equation What is the ratio of the number of moles of magnesium carbonate to the number of moles of nitric acid in the reaction? Tick one box.
AQA · GCSE · Chemistry
Energy changes
05.3 · 5 marks Calculating hydrogen bond energy Calculate the bond energy X for the H—H bond. Use Figure 7 and Table 3. 05.4 · 3 marks Completing an exothermic profile Complete Figure 8. You should complete the profile line, label the energy level of the reactants and the product, and label the... 04.7 · 2 marks Improving temperature-change method Give two improvements to the method to produce more accurate results. Do not refer to improvements to the apparatus in your answer.
AQA · GCSE · Chemistry