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Molar Concentration Formula:
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Molar concentration (molarity) is a measure of the concentration of a solute in a solution, expressed as the number of moles of solute per liter of solution. It's a fundamental concept in chemistry for preparing solutions and performing calculations.
The calculator uses the formula:
Where:
Explanation: The formula converts percentage concentration to molarity by accounting for the mass of solute per volume of solution and the molecular weight of the solute.
Details: Molar concentration is crucial for preparing solutions with precise concentrations, performing stoichiometric calculations, and ensuring reproducibility in chemical experiments and industrial processes.
Tips: Enter the percentage concentration (%), density of the solution (g/mL), and molecular weight of the solute (g/mol). All values must be positive numbers.
Q1: Why multiply by 10 in the formula?
A: The factor of 10 converts percentage (per 100) and density (g/mL) to g/L units needed for molarity (mol/L).
Q2: Does this work for all solutions?
A: This works for most aqueous solutions. For non-ideal solutions or those with significant volume changes on mixing, more complex calculations may be needed.
Q3: What's the difference between molarity and molality?
A: Molarity is moles per liter of solution, while molality is moles per kilogram of solvent. They differ when temperature changes or for concentrated solutions.
Q4: How accurate is this calculation?
A: Accuracy depends on the precision of your input values, especially the density measurement which can vary with temperature.
Q5: Can I use this for mixed solvents?
A: For mixed solvents, you need the effective density of the solution, which may not be a simple average of the component densities.