Molarity Formula:
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Molarity (M) is a measure of concentration in chemistry, defined as the number of moles of solute per liter of solution. It is one of the most commonly used units for expressing concentration in chemical and biological laboratories.
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 solutions with precise concentrations, conducting chemical reactions, performing titrations, and ensuring reproducibility in scientific experiments.
Tips: Enter concentration in mg/mL and molecular weight in g/mol. Both values must be positive numbers. The calculator will automatically compute the molarity in mol/L (M).
Q1: Why multiply by 1000 in the formula?
A: The factor 1000 converts mg to g (÷1000) and mL to L (×1000), resulting in a net multiplication by 1000 to get moles per liter.
Q2: What is 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.
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 should be divided by 1000, and g/L should be multiplied by 1000.
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.