Write balanced symbol equations for b) calcium carbonate + hydrochloric acid → Students should be able to: neutralisation reactions. calcium chloride + water + carbon dioxide predict products from given reactants CuCO3 + H2SO4 CuSO4 + H2O + CO2 • → use the formulae of common ions to deduce (metal carbonate + acid salt + carbon dioxide + water) • → the formulae of salts. Mains 4.2.3 Soluble salts can be made from acids by Making a salt from a carbonate (40 minutes) Demonstrate a Aiming for Grade 8 LOs: reacting them with solid insoluble substances, metal such as metal oxides, hydroxides, or carbonate reacting with an acid in a boiling tube. Ask students to Explain the reaction between ammonia carbonates, The solid is added to the acid until make their observations. Then ask them to write a method for making and dilute acids to produce salts and no more reacts and the excess solid is filtered a salt from a metal carbonate reacting with a dilute acid. Students the agricultural importance of the salts. off to produce a solution of the salt. should illustrate the reaction with an equation. Encourage students to Describe neutralisation ionic Salt solutions can be crystallised to produce explain the observations that they could make which shows all of the equations, including the ionic equation solid salts. Students should be able to describe acid has reacted. They then carry out the practical, collecting the for a carbonate plus an acid. how to make pure, dry samples of named pure, dry crystals next lesson. soluble salts from information provided. Plenaries Required practical: preparation of a pure, dry Explain (5 minutes) Ask students to explain neutralisation by sample of a soluble salt from an insoluble annotating a balanced symbol equation. They should highlight the substance and a dilute acid. particle’ in red, the particle’ in blue, and water molecule in ‘acid ‘alkali green. Justify (10 minutes) Ammonium sulfate ((NH4)2SO4) and ammonium nitrate (NH4NO3) can both be used as fertilisers. Ask students to justify fertiliser they would choose.
Students should be able to: • predict products from given reactants • use the formulae of common ions to deduce the formulae of salts. 4.2.3 Soluble salts can be made from acids by reacting them with solid insoluble substances, such as metal oxides, hydroxides, or carbonates, The solid is added to the acid until no more reacts and the excess solid is filtered off to produce a solution of the salt. Salt solutions can be crystallised to produce solid salts. Students should be able to describe how to make pure, dry samples of named soluble salts from information provided. Required practical: preparation of a pure, dry sample of a soluble salt from an insoluble substance and a dilute acid. b) calcium carbonate + hydrochloric acid → calcium chloride + water + carbon dioxide CuCO3 + H2SO4 → CuSO4 + H2O + CO2 (metal carbonate + acid → salt + carbon dioxide + water) Mains Making a salt from a carbonate (40 minutes) Demonstrate a metal carbonate reacting with an acid in a boiling tube. Ask students to make their observations. Then ask them to write a method for making a salt from a metal carbonate reacting with a dilute acid. Students should illustrate the reaction with an equation. Encourage students to explain the observations that they could make which shows all of the acid has reacted. They then carry out the practical, collecting the pure, dry crystals next lesson. Plenaries Explain (5 minutes) Ask students to explain neutralisation by annotating a balanced symbol equation. They should highlight the ‘acid particle’ in red, the ‘alkali particle’ in blue, and water molecule in green. Justify (10 minutes) Ammonium sulfate ((NH4)2SO4) and ammonium nitrate (NH4NO3) can both be used as fertilisers. Ask students to justify fertiliser they would choose. Write balanced symbol equations for neutralisation reactions. Aiming for Grade 8 LOs: Explain the reaction between ammonia and dilute acids to produce salts and the agricultural importance of the salts. Describe neutralisation ionic equations, including the ionic equation for a carbonate plus an acid.