2024 Pearson Edexcel Level 1/Level 2 GCSE Chemistry 1CH0/1H PAPER 1. With Marking Scheme Merged Pearson Edexcel Level 1/Level 2 GCSE (9–1) Friday 17 May 2024

2024 Pearson Edexcel Level 1/Level 2 GCSE Chemistry 1CH0/1H PAPER 1. With Marking Scheme Merged Pearson Edexcel Level 1/Level 2 GCSE (9–1) Friday 17 May 2024 reference Morning (Time: 1 hour 45 minutes) Paper Chemistry PAPER 1 1CH0/1H   Higher Tier You must have: Calculator, ruler, Periodic Table (enclosed) • Use black ink or ball-point pen. • Fill in the boxes at the top of this page with your name, • centre number and candidate number. • Answer all questions. Answer the questions in the spaces provided •– there may be more space than you need. • Calculators may be used. • Any diagrams may NOT be accurately drawn, unless otherwise indicated. Total Marks You must show all your working out with your answer clearly identified at the end of your solution. Instructions • The total mark for this paper is 100. • The marks for each question are shown in brackets •– use this as a guide as to how much time to spend on each question. In questions marked with an asterisk (*), marks will be awarded for your ability to structure your answer logically, showing how the points that you make are related or follow on from each other where appropriate. Information Advice • Read each question carefully before you start to answer it. • Try to answer every question. • Check your answers if you have time at the end. P74423A ©2024 Pearson Education Ltd. F:1/1/1/1/1/1/1/1/ *P74423A0132* Turn over Answer ALL questions. Write your answers in the spaces provided. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 (a) Chemical cells produce a voltage. A chemical cell can be made by placing the metals copper and iron in a beaker of sodium chloride solution as shown in Figure 1. V copper iron sodium chloride solution Figure 1 Describe what will happen to the reading on the voltmeter over a long period of time. 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(b) Iron is a transition metal. Which of the following is most likely to be a property of iron? (1) A iron forms a colourless oxide B iron is a poor conductor of heat C iron has a low boiling point D iron has a high density DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA 2 *P74423A0232*  DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA (c) An iron atom has a diameter of 2.52 × 10–10 m. What is the size of this iron atom in nanometres? (1) A 2.52 B 0.252 C 0.0252 D 0.00252 (d) Figure 2 shows the arrangement of atoms in three different alloys of copper and zinc, A, B and C. Alloy A Alloy B Alloy C Key: zinc atom copper atom DO NOT WRITE IN THIS AREA Figure 2 Explain which of the three alloys, A, B and C, is the strongest. 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(Total for Question 1 = 6 marks) *P74423A0332* 3  Turn over BLANK PAGE 4 *P74423A0432* DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA  2 Barium hydroxide reacts with dilute hydrochloric acid to form barium chloride solution and water. DO NOT WRITE IN THIS AREA (a) (i) Complete the balanced equation for the reaction by adding a number in front of HCl(aq). Ba(OH)2(s) + . . . . . . . . . . . . . . . . . . . . . . . . HCl(aq) → BaCl2(aq) + 2H2O(l) (ii) State what you would see during the reaction. (1) (1) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (b) A student investigated how the pH of the mixture changed as barium hydroxide was added to dilute hydrochloric acid. The student used this method.