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Molarity Formula:
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Molarity (M) is a unit of concentration measuring the number of moles of a solute per liter of solution. It is one of the most commonly used concentration units in chemistry and biochemistry for expressing the concentration of solutions.
The calculator uses the molarity conversion formula:
Where:
Explanation: The formula converts mass concentration (mg/mL) to molar concentration (mol/L) by accounting for the molecular weight of the substance and unit conversions.
Details: Accurate molarity calculations are essential for preparing chemical solutions, conducting experiments, pharmaceutical formulations, and ensuring proper concentrations in biological assays and industrial processes.
Tips: Enter the concentration in mg/mL and the molecular weight in g/mol. Both values must be positive numbers. The calculator will provide the molarity in mol/L (M).
Q1: Why multiply by 1000 in the formula?
A: The factor 1000 converts milligrams to grams (since molecular weight is in g/mol), ensuring proper unit conversion from mg/mL to g/L for molarity calculation.
Q2: 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.
Q3: Can I use this calculator for any chemical compound?
A: Yes, as long as you know the exact molecular weight of the compound and its concentration in mg/mL.
Q4: What if my concentration is in different units?
A: Convert your concentration to mg/mL first. For example, μg/mL to mg/mL by dividing by 1000, or g/L to mg/mL by multiplying by 1.
Q5: How accurate is this calculation?
A: The calculation is mathematically exact. Accuracy depends on the precision of your input values for concentration and molecular weight.