AQA GCSE CHEMISTRY Higher Tier Paper 2 2020.

AQA GCSE CHEMISTRY Higher Tier Paper 2 2020. *junH01* IB/M/Jun20/E12 8462/2H For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Wednesday 10 June 2020 Morning Time allowed: 1 hour 45 minutes 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. Do not write outside the box around each page or on blank pages. • 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 100. • 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. Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE CHEMISTRY Higher Tier Paper 2 H 2 *02* IB/M/Jun20/8462/2H Do not write outside the box 0 1 This question is about chemical analysis. A student tested copper sulfate solution and calcium iodide solution using flame tests. This is the method used. 1. Dip a metal wire in copper sulfate solution. 2. Put the metal wire in a blue Bunsen burner flame. 3. Record the flame colour produced. 4. Repeat steps 1 to 3 using the same metal wire but using calcium iodide solution. 0 1 . 1 What flame colour is produced by copper sulfate solution? [1 mark] 0 1 . 2 Calcium compounds produce an orange-red flame colour. The student left out an important step before reusing the metal wire. The student’s method did not produce a distinct orange-red flame colour using calcium iodide solution. Explain why. [2 marks] 3 *03* Turn over ► IB/M/Jun20/8462/2H Do not write outside the 0 1 box . 3 The student added sodium hydroxide solution to: • copper sulfate solution • calcium iodide solution. Give the results of the tests. [2 marks] Copper sulfate solution Calcium iodide solution 0 1 . 4 To test for sulfate ions the student added dilute hydrochloric acid to copper sulfate solution. Name the solution that would show the presence of sulfate ions when added to this mixture. [1 mark] 0 1 . 5 To test for iodide ions the student added dilute nitric acid to calcium iodide solution. Name the solution that would show the presence of iodide ions when added to this mixture. Give the result of the test. [2 marks] Solution Result