plumiRates of hydrolysis and reactivity trends (Core Practical 5): Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 10.B.4 Rates of hydrolysis and reactivity trends (Core Practical 5), 2019–2025, with mark schemes and examiner’s reports where available.
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Q13(a)
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All 26 questions on Rates of hydrolysis and reactivity trends (Core Practical 5), as a list
- June 2025, AS Unit 2, Q13(a) (1 mark): The rate was fastest for 1-iodobutane and slowest for 1-chlorobutane. Which is the best explanation for this result? (1) A the bond strength of the hydrogen ha
- June 2025, AS Unit 2, Q13(b) (1 mark): What is observed when 1-bromobutane is warmed with aqueous silver nitrate in the presence of ethanol? (1) A an orange solution B a cream precipitate soluble in
- January 2025, AS Unit 2, Q19(c)(ii) (2 marks): Compound Y also reacts with cold, dilute aqueous potassium hydroxide. I Y Explain how the rate of reaction will compare with that of compound X. (2)
- October 2024, AS Unit 2, Q17(b)(i) (2 marks): Describe what you would observe when separate samples of A and B are warmed with silver nitrate dissolved in aqueous ethanol. (2) Observation with A Observation
- October 2024, AS Unit 2, Q17(b)(ii) (2 marks): Give two reasons why A reacts more quickly than B when warmed with silver nitrate dissolved in aqueous ethanol. (2)
- June 2024, AS Unit 2, Q16(b)(iii) (2 marks): Give two reasons why, under the conditions used in (b)(ii), the reaction between potassium hydroxide and 2‑iodo‑2‑methylpropane is faster than the reaction betw
- June 2024 (R), AS Unit 2, Q21(b) (2 marks): The two halogenoalkanes in part (a) react with aqueous potassium hydroxide to produce alcohols. Give two reasons why the rate of reaction of the iodoalkane is f
- June 2024 (R), AS Unit 3, Q4(a) (2 marks): Justify an appropriate temperature for the water bath. (2)
- June 2024 (R), AS Unit 3, Q4(b) (2 marks): Suggest, by name or formula, a bromoalkane and a chloroalkane suitable for this experiment, justifying your answers. (2)
- June 2024 (R), AS Unit 3, Q4(c) (1 mark): State how the results of this experiment could be converted into a value that can be used as a measure of rate. (1)
- January 2024, AS Unit 2, Q15 (1 mark): Silver nitrate, in aqueous ethanol, is added separately to four halogenoalkanes. Which would form a silver halide precipitate in the shortest time? A 1-bromobut
- January 2024, AS Unit 2, Q23(b) (1 mark): Give the structure of the C4H9Br bromoalkane that would react fastest with aqueous silver nitrate in ethanol. (1)
- October 2023, AS Unit 2, Q15 (1 mark): Separate solutions of 1‑chloropropane and 1‑bromopropane in ethanol are warmed with aqueous silver nitrate. Why does the formation of a precipitate take longer
- June 2023, AS Unit 2, Q17 (1 mark): When 1-chlorobutane is mixed with ethanol and aqueous silver nitrate, a reaction occurs. Which species is the nucleophile in this reaction? A ethanol B nitrate
- January 2023, AS Unit 2, Q13 (1 mark): Silver nitrate in aqueous ethanol is added separately to four halogenoalkanes. Which would form a silver halide precipitate in the shortest time? A (CH3)3CI B (
- January 2023, Unit 6, Q2(a)(iii) (2 marks): Explain how the use of aqueous ethanol in the reaction mixture allows the reaction in Step 3 to proceed at a relatively fast rate. A description of the forces i
- June 2022, AS Unit 2, Q17(b) (3 marks): Samples of 1-iodobutane and 2-chloro-2-methylpropane were hydrolysed using aqueous silver nitrate in ethanol. Explain whether or not it is possible to predict t
- January 2022, AS Unit 2, Q20(c) (3 marks): The reactions of ammonia and of hydroxide ions with halogenoalkanes are similar. Compare the rate of reaction of ammonia with 1‑chlorobutane and with 2‑bromo‑2‑
- October 2021, AS Unit 2, Q20(a)(i) (1 mark): State what would be measured in the experiment to compare the rates of hydrolysis. (1)
- October 2021, AS Unit 2, Q20(a)(ii) (2 marks): State which of these halogenoalkanes would hydrolyse the fastest. Justify your answer. (2)
- June 2021, AS Unit 2, Q9(a) (1 mark): Which of these halogenoalkanes reacts the fastest? (1) A CH3CHICH3 B CH3CHBrCH3 C CH3CHClCH3 D CH3CHFCH3
- June 2021, AS Unit 2, Q9(b) (1 mark): Which of these halogenoalkanes reacts the fastest? (1) A CH3CHBrCH(CH3)CH3 B CH3CH2CBr(CH3)CH3 C CH3CH(CH2Br)CH2CH3 D CH3CH2CH2CH2CH2Br
- January 2021, AS Unit 3, Q4(c) (3 marks): The choroalkane produced is used in an experiment to compare its rate of hydrolysis with two other halogenoalkanes. A student dissolves separate 1.0 cm3 samples
- October 2020, AS Unit 2, Q16(d) (6 marks): The relative rates of hydrolysis of a series of halogenoalkanes were determined using the following method: five test tubes, each containing 2 cm3 of ethanol
- January 2020, AS Unit 2, Q11(c) (1 mark): Bromoethane and chloroethane react with aqueous potassium hydroxide at different rates. Which is correct? (1) Difference in rate Reason for difference Cl bond A
- January 2020, AS Unit 2, Q13 (1 mark): A halogenoalkane is dissolved in aqueous ethanol. When aqueous silver nitrate is added, a white precipitate forms immediately. What is the halogenoalkane? A 1-c
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