Chapter 3 of 16
Revision Notes
Ionic Equilibria — Revision Notes
Maharashtra Board · Class 12 · Chemistry
Ionic Equilibria revision notes for Maharashtra Board Class 12 Chemistry: 4 topics in quick points. Includes Types of Electrolytes and Degree, Theories.
44 questions25 flashcards5 formulas & key relations5 concepts
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Key Topics to Revise
1
Types of Electrolytes and Degree of Dissociation
- Strong electrolytes: Complete ionization (HCl, NaOH, salts)
- Weak electrolytes: Partial ionization with equilibrium establishment
- Degree of dissociation (α) = moles dissociated / total moles
2
Theories of Acids and Bases
- Arrhenius Theory: Acids produce H⁺, bases produce OH⁻ in water
- Brønsted-Lowry Theory: Acids are proton donors, bases are proton acceptors
- Lewis Theory: Acids accept electron pairs, bases donate electron pairs
3
Ostwald's Dilution Law and Dissociation Constants
- Applies to weak electrolytes in equilibrium state
- Degree of dissociation increases with dilution
- Ka and Kb are equilibrium constants for weak acids and bases
4
Autoionization of Water and pH Scale
- Pure water undergoes self-ionization: 2H₂O ⇌ H₃O⁺ + OH⁻
- Ionic product of water: Kw = [H₃O⁺][OH⁻] = 1.0 × 10⁻¹⁴ at 25°C
- pH = -log₁₀[H⁺], pOH = -log₁₀[OH⁻]
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Full NotesKey Concepts
Strong electrolytes (HClArrheniusFor weak acidsWater undergoes selfSalts of strong acid + strong
Frequently Asked Questions
What are the important topics in Ionic Equilibria for Maharashtra Board Class 12 Chemistry?
Key topics in Ionic Equilibria include Types of Electrolytes and Degree of Dissociation, Theories of Acids and Bases, Ostwald's Dilution Law and Dissociation Constants, Autoionization of Water and pH Scale. Study these first, then practise questions on each for the Maharashtra Board Class 12 board exam.
How should I revise Ionic Equilibria for the Maharashtra Board Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Ionic Equilibria. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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