plumiAnalysis of unknowns (Core Practical 15): Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 19.2.3 Analysis of unknowns (Core Practical 15), 2019–2025, with mark schemes and examiner’s reports where available.
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Q1(a)(i)
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All 3 questions on Analysis of unknowns (Core Practical 15), as a list
- June 2025, Unit 6, Q1(a)(i) (2 marks): Heat a small amount A is a (2) of solid A in a test hydrated salt. 1 tube, holding some cobalt chloride paper at the mouth of the test tube. 2
- June 2025, Unit 6, Q1(b)(iii) (1 mark): State the formula of salt B. (1)
- October 2024, Unit 6, Q1(a)(iii) (2 marks): Give the formulae of the three ions present in Q and hence the formula of compound Q. (2) Ions in Q Formula of Q
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