Chemistry Paper 2 Gap Filling: Key Concepts and Examples

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Enhance your understanding of precision in terminology, corrosion prevention methods, volume-to-moles conversion, rate calculations, and C2H scoring with insightful content and clear explanations. Master the essential topics to ace your chemistry exams!

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Uploaded on Apr 23, 2025 | 2 Views

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Chemistry Paper 2 Gap Filling Topics I need to work on: Marks: Grade: Marks for next grade:

Precision of Terminology Measuring cylinder Gas syringe High temperature not heat Only iron rusts - everything else corrodes

Corrosion Water and oxygen (from air) are needed. Preventing corrosion: - Paint - Stainless steel resists corrosion - Aluminium is reactive ( is in Gp3) but it form a coherent oxide layer which prevents further oxidation - Iron is less reactive but the rust (oxide) layer is not coherant so corrosion continues

Volume to moles 24dm3 of any gas is 1 mole. Limiting reactant calculation process: 1. Work out how many moles of each substance you have 2. Compare to ratio given by balancing numbers. 3. Work out which will run out first.