What is it
Students study reactions of acids with metals, bases and carbonates, the reactivity series and displacement reactions, extraction of metals, electrolysis, and the pH scale in more quantitative depth than KS3.
Why it matters
This topic connects abstract reaction rules to real industrial processes like metal extraction and electroplating, and features heavily in required-practical exam questions.
Exam tip
Learn the reactivity series order by heart (potassium down to gold) — almost every displacement or extraction question depends on comparing two metals' positions in this exact sequence.
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