Ionic Equilibria — Formula Sheet
Maharashtra Board · Class 12 · Chemistry
5 formulas from Ionic Equilibria (Maharashtra Board Class 12 Chemistry) on one page, grouped by topic. Includes Pure water undergoes, Ionic product.
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Formulas and Key Relations
Types of Electrolytes and Degree of Dissociation
Degree of dissociation (α) = moles dissociated / total moles
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⁻]
Key relations
For weak acids
Ka = α²c/(1-α), and for very weak acids Ka = α²c, so α = √(Ka/c).
Full sheet with units and worked examples
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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