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Molar Concentration Formula:
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Molar concentration, or molarity, is a measure of the concentration of a solute in a solution. It is defined as the number of moles of solute per liter of solution. The SI unit for molarity is mol/L.
The calculator uses the molar concentration formula:
Where:
Explanation: This formula converts mass concentration to molar concentration by dividing the concentration in grams per liter by the molecular weight in grams per mole.
Details: Molar concentration is fundamental in chemistry for preparing solutions, conducting experiments, and calculating reaction stoichiometry. It's essential for accurate measurements in analytical chemistry, biochemistry, and pharmaceutical applications.
Tips: Enter concentration in g/L and molecular weight in g/mol. Both values must be positive numbers. The calculator will compute the molarity in mol/L.
Q1: What's the difference between molarity and molality?
A: Molarity is moles per liter of solution, while molality is moles per kilogram of solvent. Molarity is temperature-dependent, while molality is not.
Q2: How do I find the molecular weight of a compound?
A: Molecular weight is the sum of atomic weights of all atoms in a molecule. You can find it on chemical databases or calculate it from the chemical formula.
Q3: Can I use different concentration units?
A: Yes, but you'll need to convert them to g/L first. Common conversions include mg/mL to g/L (multiply by 1) and μg/μL to g/L (multiply by 1000).
Q4: Why is molar concentration important in dilutions?
A: Molarity allows you to calculate exactly how much solvent to add to achieve a desired concentration using the dilution formula M₁V₁ = M₂V₂.
Q5: What are typical molarity ranges in biological systems?
A: In biochemistry, common molarities range from micromolar (10⁻⁶ M) to millimolar (10⁻³ M) for most metabolites and enzymes.