Solutions

CBSE · Class 12 · Chemistry

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

70 questions20 flashcards5 concepts

Key Topics to Revise

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

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

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

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

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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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