Conversion Formula:
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The conversion from mg/L to mmol/L is a common calculation in chemistry and biochemistry that allows comparison of concentrations on a molar basis. It accounts for the molecular weight of the substance and any fractional components in the measurement.
The calculator uses the conversion formula:
Where:
Explanation: This formula converts mass concentration to molar concentration by accounting for the molecular weight of the substance and any fractional components in the measurement.
Details: Accurate unit conversion is essential for comparing concentrations across different substances, preparing solutions with specific molarities, and interpreting laboratory results in clinical and research settings.
Tips: Enter concentration in mg/L, the appropriate fraction value, and the molecular weight in g/mol. All values must be positive numbers greater than zero.
Q1: When is the fraction value not equal to 1?
A: The fraction is used when the measured substance represents only a portion of the total, such as when measuring specific ions or components within a compound.
Q2: How do I find the molecular weight of a compound?
A: Molecular weight can be calculated by summing the atomic masses of all atoms in the molecule, or found in chemical databases and reference materials.
Q3: Can this calculator be used for any substance?
A: Yes, as long as you have the correct molecular weight and appropriate fraction value for the specific measurement context.
Q4: Why convert to mmol/L instead of mol/L?
A: mmol/L (millimoles per liter) is often more practical for biological and medical concentrations where substances are typically present in millimolar ranges.
Q5: What's the difference between mg/L and ppm?
A: For dilute aqueous solutions, mg/L is approximately equal to ppm (parts per million), but they are different units with mg/L being mass/volume and ppm being mass/mass.