1. What Is Molarity?

Molarity (M) is a unit of concentration that represents the number of moles of a solute per liter of solution. It's one of the most commonly used concentration units in chemistry and biology.

2. How Does The Conversion Work?

The conversion from mg/mL to molarity uses the formula:

Where:

• \( M \) — Molarity (mol/L)
• \( mg/mL \) — Concentration in milligrams per milliliter
• \( MW \) — Molecular weight (g/mol)

Explanation: The formula converts mass concentration (mg/mL) to molar concentration (mol/L) by accounting for the molecular weight of the substance and converting units appropriately.

3. Importance Of Molarity Calculation

Details: Accurate molarity calculations are essential for preparing solutions with precise concentrations, conducting chemical reactions, and performing quantitative analyses in laboratories.

4. Using The Calculator

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.

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 1000 in the formula?
A: We multiply by 1000 to convert mg to μg (since 1 mg = 1000 μg) and maintain consistent units in the calculation.

Q2: Can this calculator be used for any substance?
A: Yes, as long as you know the molecular weight of the substance and its concentration in mg/mL.

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.

Q4: How precise should the molecular weight be?
A: Use the most precise molecular weight available for accurate results, typically to at least two decimal places.

Q5: Can I convert molarity back to mg/mL?
A: Yes, the reverse calculation is: mg/mL = (M × MW) / 1000