DP Chemistry (last assessment 2024)

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Question 17N.2.sl.TZ0.1e.i

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.2.sl.TZ0.1e.i
Level sl Paper 2 Time zone TZ0
Command term Explain Question number e.i Adapted from N/A
e.i.
[Maximum mark: 2]
17N.2.sl.TZ0.1e.i

Curves X and Y were obtained when a metal carbonate reacted with the same volume of ethanoic acid under two different conditions.

(e.i)

Explain the shape of curve X in terms of the collision theory.

[2]

Markscheme

«initially steep because» greatest concentration/number of particles at start

OR

«slope decreases because» concentration/number of particles decreases

volume produced per unit of time depends on frequency of collisions

OR

rate depends on frequency of collisions

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