Question Constellation Sign up for free AQA · GCSE · Chemistry
Chemical changes
01.1 · 2 marks Products of an acid–carbonate reaction Complete the word equation for the reaction. 01.2 · 1 mark Recognising excess copper carbonate Give one observation the student could make during Step 4 which shows that the copper carbonate is in excess. 01.3 · 1 mark Purpose of filtering excess solid Give one reason for filtering the mixture in Step 5. 01.4 · 1 mark Equipment for gentle heating Name the equipment that can be used to warm the filtrate gently in Step 6. 01.6 · 2 marks Choosing metals for salt preparation Some salts can be produced by reacting sulfuric acid with a metal. Neither copper nor sodium is used to produce a salt with... 02.3 · 2 marks Universal indicator in potassium hydroxide Potassium hydroxide solution is produced when potassium reacts with water. What is the colour of universal indicator when added... 04.4 · 2 marks Completing a zinc ionic equation Complete the ionic equation for the reaction between zinc and copper sulfate solution. Include state symbols. 05.2 · 1 mark Ion mobility in solid electrolytes Solid calcium chloride cannot be electrolysed. Give one reason why.
AQA · GCSE · Chemistry
Quantitative chemistry
01.5 · 3 marks Calculating actual mass from yield The maximum theoretical mass of the salt that could be produced using 50 cm³ of the sulfuric acid is 12.5 g. The percentage... 04.5 · 3 marks Calculating a mean with uncertainty Calculate the mean highest temperature reached. Include the uncertainty in your answer.
AQA · GCSE · Chemistry
Atomic structure and the periodic table
02.1 · 2 marks Comparing sodium and potassium electrons Give one similarity and one difference between the electronic structures of sodium and potassium. 02.2 · 2 marks Observing potassium reacting with water Give two observations made when potassium reacts with water. 02.4 · 2 marks Plotting Group 0 density data Plot the data from Table 1 on Figure 1. 02.5 · 1 mark Estimating krypton density from a graph Estimate the density (X) of krypton. Use Figure 1 and Table 1. 02.6 · 1 mark Predicting a halogen displacement reaction The elements in Group 7 are called the halogens. A more reactive halogen can displace a less reactive halogen from a solution of... 02.7 · 1 mark Trends down Group 7 Which of the following describes the trends going down Group 7? Tick one box. 03.1 · 2 marks Naming early atomic models Name the models of the atom shown in Figure 2. 03.2 · 4 marks Comparing plum pudding and current models Compare model A with the model of the atom used today. Use Figure 2. 03.3 · 2 marks Defining isotopes using subatomic particles Chadwick’s experiments showed the existence of neutrons in an atom. This led to an understanding of isotopes. Define the term...
AQA · GCSE · Chemistry
Energy changes
04.1 · 2 marks Drawing intersecting best-fit lines Draw two lines of best fit on Figure 3. The lines should cross. 04.2 · 4 marks Explaining a zinc temperature graph Explain the results shown in Figure 3. Do not refer to anomalous points. Use data from Figure 3. 04.3 · 2 marks Thermal insulation in calorimetry Explain why using a polystyrene cup gives more accurate results than using a glass beaker. 04.6 · 1 mark Explaining random experimental errors The results show random errors. The student did not make any measuring errors. Suggest one reason for the random errors in this...
AQA · GCSE · Chemistry