AQA GCSE CHEMISTR Y Higher Tier Paper 2 Assessment 2020

AQA GCSE CHEMISTR Y Higher Tier Paper 2 2020 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. outside the . 1 What flame colour is produced by copper sulfate solution? [1 mark] . 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.