ChemistryScalar QuantityNCTB রসায়ন অধ্যায় ৬ (মোলের ধারণা ও রাসায়নিক গণনা)
Molarity
Bengali: মোলার ঘনমাত্রা•Pronunciation: মোলারিটি•Symbol: S \text{ বা } M
Standard Definition:
The concentration of a solution expressed as the number of moles of solute per liter of solution.
📐 Mathematical Equation, Units & Dimensions
Defining Mathematical Equation
Standard SI Unit
mol/L or M (Molar)($mol/L$ বা $M$ (মোলার))
Dimensional Analysis
CGS Unit
mol/cm^3
📖 Physical Concept & Comprehensive Explanation
Molarity measures volumetric solution concentration. Because liquids expand with temperature, molarity varies slightly with temperature. Common benchmarks: Molar (1 M), Semi-molar (0.5 M), Decimolar (0.1 M), and Centimolar (0.01 M).
🎯 High-Yield Revision Points
- ✓Formula: S = (1000 * w) / (M * V).
- ✓Decimolar = 0.1 M; Semi-molar = 0.5 M.
- ✓Decreases as temperature rises due to thermal expansion of solution volume.
Use Online Solver for Molarity
Compute step-by-step solutions, verify formulas, and plot interactive diagrams on biggan.me.
❓ Frequently Asked Exam Questions (FAQ)
Common questions in board and competitive entrance examinations
Q1: What is a decimolar solution?
A solution containing 0.1 moles of solute per liter of solution.