1. What is Millimolar Concentration?

Millimolar (mM) is a unit of concentration representing millimoles per liter of solution. It's commonly used in chemistry and biochemistry to express concentrations of solutions.

2. How Does the Calculator Work?

The calculator uses the millimolar formula:

Where:

• \( Grams \) — Mass of the substance in grams
• \( Molar Mass \) — Molecular weight in grams per mole
• \( Volume \) — Volume of the solution in liters
• \( 1000 \) — Conversion factor from moles to millimoles

Explanation: The formula converts mass to moles, then calculates concentration per liter, and finally converts to millimolar units.

3. Importance of Millimolar Calculation

Details: Accurate concentration calculations are essential for preparing chemical solutions, conducting experiments, and ensuring proper reaction stoichiometry in laboratory settings.

4. Using the Calculator

Tips: Enter mass in grams, molar mass in g/mol, and volume in liters. All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

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

Q2: When should I use millimolar units?
A: Millimolar units are commonly used for dilute solutions in biological and chemical applications where concentrations are typically low.

Q3: How do I find the molar mass of a compound?
A: Molar mass is the sum of atomic masses of all atoms in the molecule, which can be found using the periodic table or chemical databases.

Q4: Can I use different volume units?
A: The calculator requires liters. Convert milliliters to liters by dividing by 1000 (1 mL = 0.001 L).

Q5: What if my substance is a hydrate?
A: For hydrates, include the water molecules in the molar mass calculation (e.g., CuSO₄·5H₂O molar mass includes the water mass).