1. What is Molarity?

Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution. It's one of the most common units for expressing concentration in chemistry.

2. How Does the Calculator Work?

The calculator uses the molarity formula:

Where:

• \( M \) — Molarity (mol/L)
• \( m \) — Mass of solute (g)
• \( V \) — Volume of solution (L)
• \( MW \) — Molecular weight of solute (g/mol)

Explanation: The formula converts mass to moles using molecular weight, then divides by volume to get concentration.

3. Importance of Molarity Calculation

Details: Accurate molarity calculations are essential for preparing solutions, conducting experiments, and performing quantitative chemical analysis.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between molarity and molality?
A: Molarity is moles per liter of solution, while molality is moles per kilogram of solvent.

Q2: How do I find molecular weight?
A: Sum the atomic weights of all atoms in the molecule. For example, water (H₂O) has MW = 2(1.008) + 15.999 = 18.015 g/mol.

Q3: Can I use milliliters for volume?
A: Yes, but you must convert to liters (divide by 1000) before calculation.

Q4: What if my solute is a hydrate?
A: Include the water molecules in the molecular weight calculation (e.g., CuSO₄·5H₂O).

Q5: How precise should my measurements be?
A: Use analytical balance for mass (4 decimal places) and volumetric flask for volume for highest precision.