DP Chemistry (first assessment 2025)

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Question 22M.2.SL.TZ2.a

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.2.SL.TZ2.a
Level	SL	Paper	2	Time zone	TZ2
Command term	Determine	Question number	a	Adapted from	N/A

a.

[Maximum mark: 1]

22M.2.SL.TZ2.a

Determine the coefficients that balance the equation for the reaction of lithium with water.

[1]

Markscheme

2 Li (s) + 2 H₂O (l) → 2 LiOH (aq) + H₂(g) ✔

Syllabus sections

Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.2—Electron transfer reactions » Reactivity 3.2.2—Half-equations separate the processes of oxidation and reduction, showing the loss or gain of electrons. Deduce redox half-equations and equations in acidic or neutral solutions.