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Revision Notes

Ionic Equilibrium

Telangana Open School (TOSS) · Class 12 · Chemistry

Quick revision notes for Ionic Equilibrium — Telangana Open School (TOSS) Class 12 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

53 questions35 flashcards5 concepts

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Key Topics to Revise

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1. Concepts of Acids and Bases

  • Arrhenius concept: Acids produce H⁺ ions, bases produce OH⁻ ions in water.
  • Bronsted-Lowry concept: Acids are proton donors, bases are proton acceptors.
  • Lewis concept: Acids accept electron pairs, bases donate electron pairs.
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2. Strength of Acids and Bases

  • Strong acids/bases ionize completely in water; weak ones partially ionize.
  • Ka (acid dissociation constant) measures strength of weak acids.
  • Kb (base dissociation constant) measures strength of weak bases.
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3. Self-Ionization of Water and pH Scale

  • Water undergoes auto-ionization: H₂O + H₂O ⇌ H₃O⁺ + OH⁻.
  • Ionic product of water, Kw = [H₃O⁺][OH⁻] = 1.0 × 10⁻¹⁴ at 298 K.
  • pH = -log[H₃O⁺], pOH = -log[OH⁻], and pH + pOH = 14.
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4. Common Ion Effect and Buffer Solutions

  • Common ion effect suppresses ionization of weak acids or bases when a salt with the same ion is added.
  • Buffer solutions resist pH change upon addition of small amounts of acid or base.
  • Acidic buffers: weak acid + its salt (e.g., CH₃COOH + CH₃COONa).

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Full Notes

Key Concepts

Arrhenius defines acids as substancesWeak acids and bases do notpH is defined as the negativeBuffers resist pH changes when smallFor sparingly soluble salts

Frequently Asked Questions

What are the important topics in Ionic Equilibrium for Telangana Open School (TOSS) Class 12 Chemistry?
Ionic Equilibrium covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Ionic Equilibrium — Telangana Open School (TOSS) Class 12 Chemistry?
Understand the core concepts first, then work through the 53 practice questions available for this chapter. Revise formulas and 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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