DP Chemistry (last assessment 2024)

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Question 22M.2.hl.TZ2.8d(v)

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Date May 2022 Marks available [Maximum mark: 2] Reference code 22M.2.hl.TZ2.8d(v)
Level hl Paper 2 Time zone TZ2
Command term Justify, Predict Question number d(v) Adapted from N/A
d(v).
[Maximum mark: 2]
22M.2.hl.TZ2.8d(v)

Carbon forms many compounds.

(d(v))

Predict, giving a reason, the major product of reaction between but-1-ene and steam.

[2]

Markscheme

CH3CH2CH(OH)CH3 ✔

«secondary» carbocation/CH3CH2CH+CH3 more stable ✔

 

Do not accept “Markovnikov’s rule” without reference to carbocation stability.

Examiners report

Product was correctly predicted by many, but most used Markovnikov's Rule to justify this, failing to mention the stability of the secondary carbocation, i.e., the chemistry behind the rule.

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