DP Chemistry (first assessment 2025)

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Question 21M.2.SL.TZ2.c(i)

Date	May 2021	Marks available	[Maximum mark: 1]	Reference code	21M.2.SL.TZ2.c(i)
Level	SL	Paper	2	Time zone	TZ2
Command term	Write	Question number	c(i)	Adapted from	N/A

c(i).

[Maximum mark: 1]

21M.2.SL.TZ2.c(i)

Write the equation for the reaction of Ca(OH)₂(aq) with hydrochloric acid, HCl (aq).

[1]

Markscheme

Ca(OH)₂(aq) + 2HCl (aq) → 2H₂O (l) + CaCl₂(aq) ✓

Syllabus sections

Reactivity 2. How much, how fast and how far? » Reactivity 2.1—How much? The amount of chemical change » Reactivity 2.1.1—Chemical equations show the ratio of reactants and products in a reaction. Deduce chemical equations when reactants and products are specified.