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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. It is defined as the amount of a constituent (in moles) divided by the volume of the solution (in liters).
The calculator uses the molar concentration formula:
Where:
Explanation: The formula calculates how many moles of a substance are present in one liter of solution.
Details: Molarity is one of the most commonly used units of concentration in chemistry. It's essential for preparing solutions with precise concentrations, stoichiometric calculations, and understanding reaction dynamics.
Tips: Enter the amount of substance in moles and the volume in liters. Both values must be positive numbers. The calculator will compute the molar concentration in mol/L (M).
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 changes with temperature, while molality does not.
Q2: What are typical molar concentration values?
A: Concentrations range from millimolar (mM, 10⁻³ M) to molar (M) for most laboratory solutions. Biological systems often work in micromolar (μM) to nanomolar (nM) ranges.
Q3: How do I prepare a solution of specific molarity?
A: Calculate the required moles (n = M × V), then weigh out the corresponding mass (mass = n × molar mass) and dissolve in solvent to reach the desired volume.
Q4: Why is molarity temperature dependent?
A: Because volume changes with temperature, while the number of moles remains constant. For precise work at different temperatures, molality may be preferred.
Q5: Can I use other units with this calculator?
A: The calculator expects moles and liters. Convert other units first (e.g., mmol to mol, mL to L) before using the calculator.