A complete revision and exam practice pack for SC8f Reactions of Acids with Metals and Carbonates, covering C3.11a, C3.11d, C3.12 and C0.4H.

Topic Mastery Sheet (PDF) - a comprehensive student reference covering both reaction types, both gas tests, and (Higher) ionic equations with OIL RIG. The acid + metal section explains that metals above hydrogen in the reactivity series displace hydrogen from acids, producing a salt and hydrogen gas, and notes that copper, silver and gold do not react. A worked equations table covers zinc + sulfuric acid, magnesium + hydrochloric acid, and iron + sulfuric acid. The acid + carbonate section covers three reactions with word and symbol equations, including CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. The gas tests are stated precisely as the examiners require them: for hydrogen, place a lighted splint near the gas - it ignites and produces a squeaky pop (the mark scheme explicitly says to ignore ‘pop test’ without a lighted splint); for carbon dioxide, bubble through limewater - it turns milky or cloudy as a white precipitate of calcium carbonate forms. The Higher-tier ionic equation section works through Zn + H₂SO₄ by expanding ions and cancelling spectator SO₄²⁻, giving Zn(s) + 2H⁺(aq) → Zn²⁺(aq) + H₂(g). OIL RIG is introduced in context: the metal is oxidised (loses electrons to form a cation); the H⁺ ions are reduced (gain electrons to form H₂). The stretch section covers acid rain damage to limestone buildings and electrochemical corrosion of iron.

Student Exam Practice Sheet (PDF + DOCX) - six questions (12 marks): observations when copper carbonate is added to HCl, the hydrogen gas test, completing and balancing the zinc + sulfuric acid equation with state symbols, the ionic equation for iron + sulfuric acid (Higher), whether the H⁺ half equation represents oxidation or reduction (Higher), and writing the balanced equation for acid rain + iron.

Teacher Answer Key (PDF + DOCX) - full tick-point mark scheme with examiner notes.

©BoxsiderResources. Licensed for classroom use by the purchasing teacher. Not for redistribution or resale.