DP Chemistry (last assessment 2024)

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Question 17N.3.sl.TZ0.2c

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.sl.TZ0.2c
Level sl Paper 3 Time zone TZ0
Command term Calculate Question number c Adapted from N/A
c.
[Maximum mark: 1]
17N.3.sl.TZ0.2c

Antacids react with hydrochloric acid in the stomach to relieve indigestion. A student investigated different brands of antacid to see which caused the largest increase in pH in a given time. She added the antacids to hydrochloric acid, and recorded the change in pH over five minutes.

(c)

Calculate the uncertainty in the change in pH.

[1]

Markscheme

(±) 0.04

OR

(±) 0.03

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