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Molar Concentration Formula:
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Molar concentration (also called molarity) is a measure of the concentration of a chemical species in a solution, expressed as the number of moles of solute per liter of solution. It is one of the most common units used to quantify the concentration of a solution in chemistry.
The calculator uses the molar concentration formula:
Where:
Explanation: This formula calculates the concentration by dividing the number of moles of solute by the volume of the solution in liters.
Details: Molar concentration is fundamental in chemical reactions, solution preparation, stoichiometry calculations, and various analytical techniques. It helps determine reaction rates, equilibrium constants, and is essential for preparing solutions of precise concentrations.
Tips: Enter the amount of substance in moles and the volume of solution in liters. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the difference between molarity and molality?
A: Molarity (M) is moles per liter of solution, while molality (m) is moles per kilogram of solvent. Molarity is temperature-dependent, while molality is not.
Q2: How do I convert grams to moles?
A: Use the formula: moles = mass (g) / molar mass (g/mol). You need to know the molar mass of the substance.
Q3: What are typical units for molar concentration?
A: The SI unit is mol/m³, but mol/L (or M) is more commonly used in chemistry. 1 M = 1 mol/L = 1000 mol/m³.
Q4: Can molar concentration be calculated for gases?
A: Yes, for gases dissolved in liquids, molar concentration can be calculated using the same formula, though gas solubility depends on temperature and pressure.
Q5: How does dilution affect molar concentration?
A: When a solution is diluted, the molar concentration decreases proportionally to the dilution factor. The relationship is expressed as M₁V₁ = M₂V₂.