Learn from K 1112 Channel: Chemistry Twelfth - Solution

Key Points of the Lecture

• Welcome and Channel Introduction
• Discussion on Getting Started
• Beginning of the Solution Chapter

CBSE Updates

• Solid State Chapter Removed: Need to Know Details
• Basic Introduction of Solution

Details of the Solution Chapter

• Types of Mixtures:
  • Solution: Particle size < 1 nm
  • Suspension: Particle size > 1000 nm
  • Colloid: Particle size 1 nm - 1000 nm
• Mixture: Combination of different components

Homogeneous and Heterogeneous Mixtures

• Homogeneous Mixtures:
  • Composition is uniform
  • Example: Sugar in Water, Alcohol in Water
• Heterogeneous Mixtures:
  • Composition is non-uniform
  • Example: Sand in Water, Oil in Water

Characteristics of Solution

• Solutions are homogeneous
• Particle size < 1 nm
• Interaction between components

Important Terms

• Solute: Which dissolves (e.g., Sugar)
• Solvent: In which solute dissolves (e.g., Water)
• Concentration: Amount of solute in the solution

Concentration Expressions

• Mass Percentage: (Mass of Solute / Mass of Solution) * 100
• Volume Percentage: (Volume of Solute / Volume of Solution) * 100
• Parts Per Million (PPM): (Mass of Solute / Mass of Solution) * 10^6
• Mole Fraction: (Moles of Solute / Total Moles)
• Molarity (M): (Moles of Solute / Volume of Solution)
• Molality (m): (Moles of Solute / Mass of Solvent)

Important Questions

• Solution Stability: Sugar solution in water will never settle
• Which one is better, Molarity or Molality? (More Usage, Accurate Result)