CHEMISTRY HL · Learning hub

Chemistry HL

HL-only depth within Reactivity 1 (entropy, Born-Haber cycles) and Reactivity 2 (advanced acid-base equilibria).

Understand before you practise

Key concepts

Use this map to choose a concept, then move directly into the matching practice.

01

Reactivity 1: entropy and spontaneity (HL)

Born-Haber cycles, entropy and Gibbs free energy.

Review and practise
02

Reactivity 2: acid-base equilibria (HL)

pH curves, buffer solutions and acid-base indicators.

Review and practise
Structured progression

Revision Ladder

Start with foundations, then move through application and challenge. Stages use activity marks and complexity.

Stage 1

Foundation

Recall core ideas and establish reliable methods.

26 activities available
Start stage
Stage 2

Apply

Connect concepts and apply them in exam-style contexts.

16 activities available
Start stage
Stage 3

Challenge

Tackle the highest-mark, multi-step activities available.

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Progress dashboard

Topic practice

Recommended next: Reactivity 1: entropy and spontaneity (HL)

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