plumiChlorination of 2-methylpropan-2-ol (Core Practical 6): Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 10.B.5 Chlorination of 2-methylpropan-2-ol (Core Practical 6), 2019–2025, with mark schemes and examiner’s reports where available.
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Q4(a)
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All 12 questions on Chlorination of 2-methylpropan-2-ol (Core Practical 6), as a list
- January 2025, AS Unit 3, Q4(a) (1 mark): Give one reason, relating to safety, why the hydrochloric acid is added to the separating funnel 3 cm3 at a time, and not all at once, in Step 2. (1)
- January 2025, AS Unit 3, Q4(b) (2 marks): Draw a labelled diagram of the separating funnel at the end of Step 3. [Density of 2‑chloro‑2‑methylpropane = 0.85 g cm–3] (2)
- January 2025, AS Unit 3, Q4(c) (1 mark): Sodium hydrogencarbonate solution is added to remove acid impurities in Step 4. Give the reason why a stronger alkali, such as sodium hydroxide solution, should
- January 2025, AS Unit 3, Q4(d) (1 mark): State the role of the sodium sulfate in Step 5. (1)
- January 2025, AS Unit 3, Q4(e) (4 marks): Identify two changes that must be made to the apparatus shown before distilling in Step 6, giving a reason for each change. (4) water from tap still head pear-s
- January 2025, AS Unit 3, Q4(f) (4 marks): Calculate the mass of 2‑chloro‑2‑methylpropane produced in this procedure, if the percentage yield is 70%. [Density of 2‑methylpropan‑2‑ol = 0.78 g cm–3] [Mr of
- June 2024 (R), AS Unit 3, Q5(a) (2 marks): Complete the list to show the correct order of the steps. (2) A
- June 2024 (R), AS Unit 3, Q5(b)(ii) (1 mark): State the purpose of adding anhydrous sodium sulfate in Step D. (1)
- January 2021, AS Unit 3, Q4(a)(i) (2 marks): The concentrated hydrochloric acid used in Step 1 was labelled Suggest two safety precautions, other than wearing safety spectacles and a laboratory coat, to mi
- January 2021, AS Unit 3, Q4(a)(iii) (1 mark): State why the tap of the separating funnel must be opened in Step 3. (1)
- January 2021, AS Unit 3, Q4(a)(iv) (1 mark): State why anhydrous sodium sulfate is added to the organic layer in Step 5. (1)
- January 2021, AS Unit 3, Q4(a)(v) (4 marks): Draw the apparatus required to distil the product and collect the distillate between 50°C and 52°C in Step 6. (4)
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