1. What is Millimolar Concentration?

Millimolar concentration (mM) is a unit of measurement that represents the number of millimoles of a solute per liter of solution. It is commonly used in chemistry and biochemistry to express concentrations of solutions.

2. How Does the Calculator Work?

The calculator uses the millimolar concentration formula:

Where:

• \( Mass \) — Mass of the solute in grams (g)
• \( Molecular\ Weight \) — Molecular weight of the solute in grams per mole (g/mol)
• \( Volume \) — Volume of the solution in liters (L)

Explanation: The formula calculates the number of moles from mass and molecular weight, then converts to millimoles and divides by volume to get concentration per liter.

3. Importance of Millimolar Calculation

Details: Accurate millimolar concentration calculation is crucial for preparing solutions with precise concentrations, conducting experiments, and ensuring reproducibility in chemical and biological research.

4. Using the Calculator

Tips: Enter mass in grams, molecular weight in g/mol, and volume in liters. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between molar and millimolar?
A: Molar (M) represents moles per liter, while millimolar (mM) represents millimoles per liter (1 M = 1000 mM).

Q2: Why use millimolar instead of molar?
A: Millimolar is often used for lower concentrations that are common in biological systems and experiments.

Q3: Can I use different units with this calculator?
A: The calculator requires specific units (g for mass, g/mol for molecular weight, L for volume). Convert other units before calculation.

Q4: How accurate is this calculation?
A: The calculation is mathematically precise. Accuracy depends on the precision of your input measurements.

Q5: What if my volume is in milliliters?
A: Convert milliliters to liters by dividing by 1000 before entering the value (1 mL = 0.001 L).