Weak Acid and Base Equilibria
Analyze the equilibrium of weak acids and bases, calculate their dissociation constants (Ka, Kb), degree of dissociation, and related pH values.
Why this shows up in the exam
You will solve for pH, Ka, Kb, and percent dissociation in weak acid/base solutions.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
The percentage of pyridine (C₅H₅N) that forms pyridinium ion (C₅H₅NH) in a 0.10 M aqueous pyridine solution (K_b for C₅H₅N = 1.7 × 10⁻⁹) is
Push further
More challenging10 harder questions built from the past papers above — a step up in difficulty, with distractors designed so you can't get there by elimination. Written and checked by our reviewers, not from a real paper.
Oxalic acid (H₂C₂O₄) is a diprotic acid. Its first dissociation constant (Kₐ₁) is 5.9 × 10⁻² and its second dissociation constant (Kₐ₂) is 6.4 × 10⁻⁵. If we consider the species present in an aqueous solution of oxalic acid, which of the following statements is most accurate?
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Law of Mass Action and Equilibrium Constant
Learn how to write equilibrium constant expressions (Kc, Kp) for chemical reactions, including the treatment of pure solids and liquids and the use of correct stoichiometric coefficients.
Le Chatelier's Principle
Apply Le Chatelier's Principle to predict the effect of changes in concentration, pressure, and temperature on the position of equilibrium in chemical and phase equilibria.
pH and pOH Calculations
Calculate pH and pOH for strong and weak acids and bases, including very dilute solutions and mixtures.