DP Chemistry (first assessment 2025)

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Question EXM.1B.HL.TZ0.2dii

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Date May Example question Marks available [Maximum mark: 3] Reference code EXM.1B.HL.TZ0.2dii
Level HL Paper 1B Time zone TZ0
Command term Estimate Question number ii Adapted from N/A
ii.
[Maximum mark: 3]
EXM.1B.HL.TZ0.2dii
(ii)

Estimate how much ascorbic acid will remain after 6 days storage at 20 °C in the same experimental conditions, stating any assumption made for the calculation.

[3]

Markscheme

assumption: linear decrease ✔

rate «mg 100 g−1 day−1 =  95.5 − 50.0 / 3 » = 15 «mg 100 g−1 day−1» ✔

«95.5 − 15 × 6 = 5.5 «mg 100 g−1 day−1» ✔

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