Module 8 Summative Assessment

Chemistry 30 Unit D Module 8 Summative Assessment Updated May 2024 for VVS Module 8 Summative Assessment Lesson 1 1. Explain the expected relative conductivity of 0.10 mol/L samples of hydrobromic acid, benzoic acid, and hydrocyanic acid. Answer (3 marks) Lesson 2 2. a. Using the five-step method, predict the predominant Bronsted-Lowry acid base reaction when solutions of ammonium chloride and sodium hydrogen carbonate are combined. Answer (1 mark) b. Identify one conjugate acid-base pair from the reaction equation. Answer (1 mark) c. Predict whether the equilibrium will favour the formation of the reactants or products. Support and explain your answer. Answer (1 mark) 3. Write two Bronsted-Lowry reaction equations illustrating the fact that the dihydrogen phosphate ion (H2PO4-(aq)) is amphiprotic. In both equations, products should be favoured. Answer (2 marks) Lesson 3 4. Calculate the pH of a 0.35 mol/L solution of nitric acid. Answer (2 marks) 5. Calculate the pH of a 0.35 mol/L solution of butanoic acid. Answer (4 marks) 6. Explain why the pH of the acids in Questions 4 and 5 are different, even though their concentrations are the same. How would the conductivity of each solution differ? Answer (3 marks)