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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's one of the most commonly used units for quantifying concentration in chemical and biological laboratories.
The calculator uses the molarity formula:
Where:
Explanation: The formula converts mass concentration to molar concentration by accounting for the molecular weight of the substance and converting units appropriately.
Details: Accurate molarity calculation is essential for preparing solutions with precise concentrations, conducting experiments, and ensuring reproducibility in scientific research and industrial processes.
Tips: Enter mass 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.
Q1: Why multiply by 1000 in the formula?
A: We multiply by 1000 to convert mg to μg (since 1 mg = 1000 μg), which helps maintain consistent units throughout the calculation.
Q2: 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 is temperature-dependent, while molality is not.
Q3: Can I use this calculator for any compound?
A: Yes, as long as you know the molecular weight of the compound and its mass concentration in mg/mL.
Q4: How precise should my measurements be?
A: For most laboratory work, measurements should be precise to at least 3-4 significant figures to ensure accurate molarity calculations.
Q5: What if my concentration is in different units?
A: Convert your concentration to mg/mL first before using this calculator, or use a different formula that matches your specific units.