DP Chemistry (last assessment 2024)

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Question 22N.2.hl.TZ0.c.ii

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.2.hl.TZ0.c.ii
Level hl Paper 2 Time zone TZ0
Command term Deduce, Write Question number c.ii Adapted from N/A
c.ii.
[Maximum mark: 1]
22N.2.hl.TZ0.c.ii

Ammonium nitrate, NH4NO3, is used as a high nitrogen fertilizer.

A 0.20 mol dm−3 solution of ammonium nitrate is prepared.

Ammonium nitrate is neutralized with sodium hydroxide. Write the equation for the reaction.

[1]

Markscheme

NH4+ (aq) + OH– (aq) → NH3 (aq) + H2O (l)

OR

NH4NO3 (aq) + NaOH (aq) → NH3 (aq) + H2O (l) + NaNO3 (aq) ✔

 

Accept NH4OH instead of NH3 + H2O.

Examiners report

A little more challenging as about a third of the candidates, even some who had correctly identified the ammonium ion as an acid, were unable to correctly work out the products of the reaction.

Syllabus sections