2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1H Chemistry Paper 1H Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]

2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1H Chemistry Paper 1H Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] 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. For Examiner’s Use Question Mark 1 2 3 4 5 6 7 TOTAL 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. *JUN238464C1H01* IB/M/Jun23/E5 8464/C/1H 2 There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED *02* IB/M/Jun23/8464/C/1H Do not write outside the box 3 0 1 This question is about carbon dioxide. Carbon dioxide is soluble in water and forms an acidic solution. 0 1 . 1 Which ion makes the solution acidic? [1 mark] 0 1 . 2 Name an indicator that could be used to test if the solution is acidic. Give the result of the test. [2 marks] Indicator Result Question 1 continues on the next page Do not write outside the box *03* Turn over ► IB/M/Jun23/8464/C/1H 4 Figure 1 shows the mass of carbon dioxide that will dissolve in 1 dm3 of water at different temperatures. Figure 1 0 1 . 3 How does the solubility of carbon dioxide change as the temperature of the water increases? [1 mark] Tick () one box. The solubility decreases The solubility does not change The solubility increases Do not write outside the box *04* IB/M/Jun23/8464/C/1H 5 0 1 . 4 Carbon dioxide dissolves in water to form an acidic solution. How does the pH of the solution change as the temperature of the water increases? Use Figure 1. Tick () one box. pH of the solution decreases pH of the solution does not change pH of the solution increases Calcium carbonate reacts with hydrochloric acid to produce carbon dioxide. The equation for the reaction is: CaCO3(s) + 2 HCl(aq) → CaCl2(aq) + CO2(g) + H2O(x) 0 1 . 5 What is the state symbol (x) in the equation? [1 mark] Tick () one box. (aq) (g) (l) (s) Question 1 continues on the next page Do not write outside the box *05* Turn over ► IB/M/Jun23/8464/C/1H [1 mark] 6 0 1 . 6 Figure 2 shows equipment a student used for an investigation. Figure 2 Do not write outside the box *06* IB/M/Jun23/8464/C/1H 7 The student investigated the volume of carbon dioxide produced when different masses of calcium carbonate react with hydrochloric acid. Describe a method the stud