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2024 AQA GCSE COMBINED SCIENCE: TRILOGY
8464/C/1H Higher Tier Chemistry Paper 1H.
Verified Question Paper with Marking Scheme Combined.
June 2024
Materials
For this paper you must have:
- a ruler
- a scientific calculator
- the periodic table (enclosed).
Instructions
- Use black ink or black ball-point pen.
- Pencil should only be used for drawing.
- Fill in the boxes at the top of this page.
- Answer all questions in the spaces provided.
- If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s).
- Do all rough work in this book. Cross through any work you do not want to be marked.
- In all calculations, show clearly how you work out your answer.
Information
- The maximum mark for this paper is 70.
- The marks for questions are shown in brackets.
- You are expected to use a calculator where appropriate.
- You are reminded of the need for good English and clear presentation in your answers. For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 TOTAL
Do not write outside the There are no questions printed on this page^ box DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED
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Do not write outside the box Mixtures of copper and zinc are heated to produce alloys. 0 1
. 2 Figure 2 represents the structures of pure copper and of an alloy of copper and zinc. Figure 2 Explain why the alloy of copper and zinc is harder than pure copper. Use Figure 2. [3 marks]
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Do not write outside the box (^0 2) A student prepared copper sulfate by reacting an acid with excess copper carbonate. Figure 3 shows the first two stages in the preparation of copper sulfate. Figure 3 (^0 2). 1 What is the formula of the acid used to prepare copper sulfate? [1 mark] Tick ( ) one box. HCl HNO 3 H 2 SO 4
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Do not write outside the box A student investigated the thermal decomposition of copper carbonate. Copper carbonate decomposes to form two products. Figure 4 shows the apparatus. Figure 4 This is the method used.
- Add 1.2 g of copper carbonate to a test tube.
- Heat the test tube and contents until the mass does not change.
- Record the mass of the contents of the test tube after heating.
- Repeat steps 1 to 3 with different masses of copper carbonate. Table 1 shows the results. Table 1 Mass of copper carbonate in test tube before heating in grams Mass of the contents of test tube after heating in grams 1.2 0. 2.4 1. 3.6 2. 4.8 3. 6.0 3.
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Do not write outside the box 6 0 3 Table 2 shows diagrams which represent the structures of two substances. Table 2 Compare the structure and bonding of sodium chloride and oxygen. [6 marks]
Do not write outside the box (^0 4). 3 10 cm (^3) of a nitric acid solution has a pH of 1 Water is added to the nitric acid solution to change the pH of the nitric acid solution to pH 3 How does the hydrogen ion concentration change? [1 mark] Tick (✓) one box. Decreases by a factor of 100 Decreases by a factor of 10 Increases by a factor of 10 Increases by a factor of 100 (^0 4). (^4) Write the ionic equation for the reaction between an acid and an alkali. [1 mark]
Do not write outside the The equation shows the reaction between magnesium carbonate and nitric acid.^ box MgCO 3 + 2 HNO 3 → Mg(NO 3 ) 2 + H 2 O + CO 2 (^0 4). 5 What is the ratio of the number of moles of magnesium carbonate to the number of moles of nitric acid in the reaction? [1 mark] Tick (✓) one box. 1 : 1 1 : 2 2 : 1 2 : 2 (^0 4). 6 A student mixed some magnesium carbonate with excess nitric acid. The student then added two drops of universal indicator to the solution. What colour was the solution after the addition of universal indicator? [1 mark] Tick (✓) one box. Red Green Blue Turn over ►
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Do not write outside the box 0 5 Nitrogen^ reacts^ with^ hydrogen^ to^ produce^ ammonia^ (NH 3 ). 0 5. 1 Complete the dot and cross diagram for an ammonia molecule. [2 marks]
