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IB Chemistry: Acids and Bases Practice

Intuition

Acid-base practice is like learning pH calculations, titrations, buffers, and equilibrium require systematic problem-solving: Acid-base practice builds skills in predicting pH, designing buffers, and understanding biological systems

Why it matters: Acid-base chemistry is fundamental to biology, medicine, and environmental science

The key insight: Acid-base practice builds skills in predicting pH, designing buffers, and understanding biological systems

IB Chemistry, Acids and Bases Practice

16 auto-graded practice problems from easy to hard difficulty, aligned to the IB Chemistry syllabus (SL/HL). Select an answer, submit, and review the explanation.

Brønsted-Lowry Theory and pH

Common Mistakes

Confusing weak acids with dilute acids: Weak acids don’t dissociate completely (Ka < 1). Dilute acids have low concentration. A dilute weak acid is still weak; a concentrated weak acid is still weak.

Forgetting that buffers resist pH change: Buffers contain a weak acid and its conjugate base. They absorb added H⁺ or OH⁻ to maintain relatively constant pH. Don’t assume buffers prevent all pH changes.

Mixing up acid with acid salt: An acid donates H⁺ (e.g., HCl). An acid salt is formed from partial neutralisation of a polyprotic acid (e.g., NaHCO₃). Don’t use the terms interchangeably.

Cross-References