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Molarity Formula:
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Molarity (M) is a measure of the concentration of a solute in a solution, defined as the number of moles of solute per liter of solution. It's one of the most commonly used units of concentration in chemistry.
The calculator uses the molarity formula:
Where:
Explanation: The formula converts the volume from milliliters to liters (by dividing by 1000) and then divides the moles of solute by this volume in liters to get molarity.
Details: Molarity is crucial for preparing solutions with precise concentrations, performing chemical reactions with accurate stoichiometry, and conducting quantitative analysis in chemistry.
Tips: Enter the amount of solute in moles and the volume of solution in milliliters. Both values must be positive numbers. The calculator will automatically convert mL to L and compute the molarity.
Q1: What's the difference between molarity and molality?
A: Molarity is moles per liter of solution (volume-based), while molality is moles per kilogram of solvent (mass-based). Molarity changes with temperature, molality doesn't.
Q2: How do I convert grams to moles for the calculator?
A: Divide the mass in grams by the molecular weight of the substance: moles = grams / molecular weight.
Q3: Why use mL instead of L in this calculator?
A: Many lab measurements are made in mL, so this calculator simplifies the conversion process for common lab work.
Q4: What is a normal range for molarity?
A: There's no "normal" range - it depends on the application. Concentrated acids might be 10-18M, while biological buffers are often in the mM (0.001M) range.
Q5: How precise should my measurements be?
A: Precision depends on your needs. For qualitative work, 2-3 significant figures may suffice. Quantitative work often requires 4+ significant figures.