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. 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 TOTAL *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 Do not write outside the box *02* IB/M/Jun23/8464/C/1H 3 0 1 This question is about carbon dioxide. Carbon dioxide is soluble in water and forms an acidic solution. 0 1 . 1Which 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 Turn over ► *03* IB/M/Jun23/8464/C/1H Do not write outside the box 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. [1 mark] Tick ( ) one box. pH of the solution decreases pH of the solution does not change pH of the solution increase