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Solutions

CBSE · Class 12 · Chemistry

Quick revision notes for Solutions — CBSE Class 12 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

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An infographic illustrating different types of solutions based on the physical state of solute and solvent, including gaseous, liquid, and solid solutions, with common examples for each.
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Key Topics to Revise

1

Types of Solutions and Basic Concepts

  • Solution = Solute + Solvent (homogeneous mixture with uniform properties throughout)
  • Solvent: Component present in largest quantity, determines physical state of solution
  • Solute: Component(s) present in smaller quantities
2

Concentration Units and Calculations

  • Six major concentration units: Mass %, Volume %, Mass/Volume %, ppm, Mole fraction, Molality
  • Mass percentage most common for solid-liquid solutions
  • Volume percentage used for liquid-liquid solutions
3

Solubility and Henry's Law

  • Solubility depends on nature of solute-solvent, temperature, and pressure
  • For solids in liquids: Generally increases with temperature (endothermic dissolution)
  • Pressure has negligible effect on solid-liquid solubility
4

Raoult's Law and Vapor Pressure

  • Vapor pressure of solution < vapor pressure of pure solvent (for non-volatile solute)
  • Raoult's Law: Partial vapor pressure ∝ mole fraction
  • For volatile liquid solutions: p_total = p₁⁰x₁ + p₂⁰x₂

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Full Notes

Key Concepts

Solutions are classified based on physicalMass % = (mass of component/totalAt constant temperatureFor volatile liquidsIdeal solutions obey Raoult's law completely

Frequently Asked Questions

What are the important topics in Solutions for CBSE Class 12 Chemistry?
Solutions covers several key topics that are frequently asked in CBSE 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 Solutions — CBSE Class 12 Chemistry?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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