1. What is Molarity?

Molarity (M) is a measure of the concentration of a solute in a solution, defined as the number of moles of solute per liter of solution. It's one of the most common units for measuring 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)
• \( MW \) — Molecular weight of solute (g/mol)
• \( V \) — Volume of solution (L)

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

3. Importance of Molarity Calculation

Details: Accurate molarity calculations are essential for preparing solutions with precise concentrations, which is critical for experiments, chemical reactions, and analytical procedures.

4. Using the Calculator

Tips: Enter mass in grams, molecular weight in g/mol (18.015 for water by default), and volume in liters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the molecular weight of water?
A: The molecular weight of water (H₂O) is approximately 18.015 g/mol.

Q2: How precise should my measurements be?
A: For most laboratory work, measurements should be made to at least 4 significant figures for accurate molarity calculations.

Q3: Can I use this for solutions other than water?
A: Yes, this calculator works for any solute as long as you know its molecular weight and the solution volume.

Q4: What's the difference between molarity and molality?
A: Molarity is moles per liter of solution, while molality is moles per kilogram of solvent. They differ when temperature changes affect solution volume.

Q5: How do I prepare a solution based on the calculated molarity?
A: Dissolve the calculated mass of solute in less than the final volume of solvent, then dilute to the exact volume needed.