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Question 18M.2.hl.TZ1.4b.ii

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.2.hl.TZ1.4b.ii
Level hl Paper 2 Time zone TZ1
Command term Draw Question number b.ii Adapted from N/A
b.ii.
[Maximum mark: 1]
18M.2.hl.TZ1.4b.ii

Calcium carbonate reacts with hydrochloric acid.

CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)

The results of a series of experiments in which the concentration of HCl was varied are shown below.

M18/4/CHEMI/HP2/ENG/TZ1/X04.b

(b.ii)

Draw the best fit line for the reaction excluding point D.

[1]

Markscheme

M18/4/CHEMI/HP2/ENG/TZ1/04.b.ii/M

straight line going through the origin AND as close to A, B, C as is reasonably possible

[1 mark]

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