DP Chemistry (last assessment 2024)

Question 22N.2.hl.TZ0.1f.i

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

f.i.

[Maximum mark: 1]

22N.2.hl.TZ0.1f.i

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

Solid ammonium nitrate can decompose to gaseous dinitrogen monoxide and liquid water.

(f.i)

Write the chemical equation for this decomposition.

[1]

Markscheme

NH₄NO₃ (s) → N₂O (g) + 2H₂O (l) ✔

Examiners report

Almost all students managed to write this simple equation, having been given the names of all reactants and products, though a handful managed to give the wrong formula for dinitrogen monoxide and some failed to balance the amount of water.

Syllabus sections

Core

Core » Topic 1: Stoichiometric relationships » 1.1 Introduction to the particulate nature of matter and chemical change

Core » Topic 1: Stoichiometric relationships

Question 22N.2.hl.TZ0.1f.i

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