DP Chemistry (last assessment 2024)

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Question 18M.3.sl.TZ1.b

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.sl.TZ1.b
Level sl Paper 3 Time zone TZ1
Command term Formulate Question number b Adapted from N/A
b.
[Maximum mark: 1]
18M.3.sl.TZ1.b

Greenhouse gases absorb infrared radiation.

Formulate an equation that shows how aqueous carbon dioxide produces hydrogen ions, H+(aq).

[1]

Markscheme

CO2(aq) + H2O(l) ⇌  H+(aq) + HCO3–(aq)

OR

CO2(aq) + H2O(l) ⇌ H2CO3(aq) AND H2CO3(aq) ⇌ H+(aq) + HCO3–(aq)

 

Accept CO2(aq) + H2O(l) ⇌ 2H+(aq) + CO32–(aq).

Accept equations with single arrow.

[1 mark]

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