Solutions — Class 12 Chemistry NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 12 Chemistry chapter "Solutions" — 8 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 12 Chemistry chapter "Solutions" — 8 important questions with detailed answers for CBSE board exam prepara…
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Key Questions Covered:
- Define a solution. What are the main components of a solution?
- Calculate the molarity of a solution containing 10.6 g of Na₂CO₃ dissolved in…
- What is the difference between molarity and molality?
- + 5 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| Define a solution. What are the main components of a solu… | ✓ Solved |
| Calculate the molarity of a solution containing 10.6 g of… | ✓ Solved |
| What is the difference between molarity and molality? | ✓ Solved |
Showing 3 of 8 questions
Q1: Define a solution. What are the main components of a solution?
A solution is a homogeneous mixture of two or more substances where one substance (solute) is uniformly dispersed in another (solvent).
Main components:
1. Solvent: The substance in which solute dissolves (usually present in larger amount). Typically liquid.
2. Solute: The substance being dissolved...
Q2: Calculate the molarity of a solution containing 10.6 g of Na₂CO₃ dissolved in water to make 500 mL of solution.
Given: Mass of Na₂CO₃ = 10.6 g, Volume of solution = 500 mL = 0.5 L
Step 1: Calculate molar mass of Na₂CO₃
Molar mass = (2 × 23) + 12 + (3 × 16) = 46 + 12 + 48 = 106 g/mol
Step 2: Calculate number of moles
Moles = mass / molar mass = 10.6 / 106 = 0.1 mol
Step 3: Calculate molarity
Molarity = mole...
Q3: What is the difference between molarity and molality?
Molarity (M):
1. Defined as moles of solute per litre of solution
2. Formula: M = moles / volume of solution (L)
3. Temperature dependent (volume changes with temperature)
4. Used in laboratory work and dilution calculations
Molality (m):
1. Defined as moles of solute per kilogram of solvent
2. For...
Showing 3 of 8 questions. Visit the full page for complete solutions.