DP Chemistry (last assessment 2024)

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Question 18M.3.sl.TZ2.a

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.sl.TZ2.a
Level sl Paper 3 Time zone TZ2
Command term Formulate Question number a Adapted from N/A
a.
[Maximum mark: 1]
18M.3.sl.TZ2.a

Excess acid in the stomach is often treated with calcium carbonate.

Formulate a chemical equation for the neutralization of stomach acid with calcium carbonate.

[1]

Markscheme

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

 

Accept ionic equation:

2H+(aq) + CO32–(aq) → CO2(g) + H2O(l)

[1 mark]

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