Acids and bases past paper questions

Chemistry 9701 · Equilibria. 1 understand and use the terms conjugate acid and conjugate base 2 define conjugate acid–base pairs, identifying such pairs in reactions 3 define mathematically the terms pH, Ka, pKa and Kw and use them in calculations (Kb and the equation Kw = Ka × Kb will not be tested) 4 calculate [H+(aq)] and pH values for: (a) strong acids (b) strong alkalis (c) weak acids 5 (a) define a buffer solution (b) explain how a buffer solution can be made (c) explain how buffer solutions control pH; use chemical equations in these explanations (d) describe and explain the uses of buffer solutions, including the role of HCO3 – in controlling pH in blood 6 calculate the pH of buffer solutions, given appropriate data 7 understand and use the term solubility product, Ksp 8 write an expression for Ksp 9 calculate Ksp from concentrations and vice versa 10 (a) understand and use the common ion effect to explain the different solubility of a compound in a solution containing a common ion (b) perform calculations using Ksp values and concentration of a common ion

In Cambridge A Level Chemistry 9701, Acids and bases came up in 5 of the 139 papers on Paperstreak, for about 1 marks a paper when it does. It last came up in October/November 2021.

Often set with Intermolecular forces, Brønsted–Lowry theory of acids and bases, Dot-and-cross diagrams, Shapes of molecules.

5 questions, newest first

9701/21/O/N/21 Question 1 part (c(ii)) · 1 mark
9701/22/O/N/21 Question 1 part (f(iv)) · 1 mark
9701/23/O/N/21 Question 1 part (c(ii)) · 1 mark
9701/22/M/J/19 Question 2 part (c(ii)) · 1 mark
9701/22/F/M/17 Question 2 part (b(i)) · 2 marks

Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.