Acids and bases (A-level only) exam tips

Exam tips

• Use clear definitions

  Always define Brønsted-Lowry acids and bases clearly in your answers.

  Clear definitions help to demonstrate your understanding and can earn you marks in exams.

• Practice identifying conjugate pairs

  Regularly practice identifying conjugate acid-base pairs in different reactions.

  This will help reinforce your understanding and improve your ability to quickly recognize these pairs in exam questions.

• Practice writing equations

  Regularly practice writing balanced equations for acid-base reactions to reinforce your understanding.

  Being proficient in writing these equations will help you in both theoretical and practical assessments.

• Clarify definitions

  Always define key terms like strength and concentration clearly in your answers.

  This will help you avoid confusion and demonstrate your understanding of the concepts.

• Show all steps in calculations

  Always show the formula used, substitution of values, and final answer with units.

  This helps to earn partial credit even if the final answer is incorrect and demonstrates your understanding of the process.

• Show all steps in calculations

  Always show your working when calculating pH or hydrogen ion concentration.

  This helps you gain partial credit even if the final answer is incorrect, and it demonstrates your understanding of the process.

• Show all steps in calculations

  When calculating concentrations, clearly show how you derived your answer using the relevant equations.

  This helps to avoid mistakes and allows partial credit for correct methods even if the final answer is incorrect.

• Show all steps in calculations

  When calculating pH or concentrations, clearly show each step of your working.

  This helps to avoid errors and allows partial credit if your final answer is incorrect.

• Show All Steps in Calculations

  Always show your working when calculating Ka or pH to avoid losing marks.

  Examiners look for understanding of the process, not just the final answer.

• Show all steps in calculations

  When calculating pH from Ka, clearly show how you derived [H⁺] and include units.

  This helps to avoid errors and allows partial credit for correct methodology even if the final answer is incorrect.