Specification references covered: C2.7 (simple and fractional distillation); C0.6 (safety); C2.11 (ink investigation)

Distillation questions in both Edexcel papers include a condenser water flow diagram, a purity test, a why-distilled-water explanation, and a fractional distillation separation question.

The Topic Mastery Sheet covers all of these with the exact mark scheme wording for each. The condenser section makes the water flow direction explicit. The simple vs fractional comparison table is taken directly from the Higher mark scheme. The worked calculation using the official liquid A/B data (boiling points 100°C and 49°C) prepares students for the exact question form used in both papers.

The Student Exam Practice Sheet (20 marks) includes: condenser arrow diagram, condenser purpose, purity test, why distilled water for analysis, fractional distillation description, simple vs fractional comparison, which liquid comes first, safety precaution, physical vs chemical change, and a technique selection question.

The Teacher Answer Key provides full mark scheme wording for every question, including the two-direction condenser water flow requirement.

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