A student investigated the reaction between magnesium ribbon and dilute hydrochloric acid, where the acid acts as the limiting reactant.
With a fixed volume of acid of pH 3, the mass of hydrogen gas produced when the reaction is complete is 0.004 g.
Predict the mass of hydrogen gas produced in the reaction with the same volume of acid of pH 2.
276 exam-style questions on Edexcel GCSE Chemistry 4.1 Acids, covering 4.1.1 Acids, alkalis and the pH scale, 4.1.2 Hydrogen ion concentration and pH, 4.1.3 Dilute and concentrated, weak and strong acids, 4.1.4 Bases, alkalis and the reactions of acids, 4.1.5 Chemical tests for hydrogen and carbon dioxide, 4.1.6 Neutralisation as a reaction of acids with bases, 4.1.7 Preparing soluble salts, and 4.1.8 Solubility rules and preparing insoluble salts. Each one has a worked solution and a mark scheme showing where the marks go.