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 commonly used units of concentration in chemistry.

2. How Does the Calculator Work?

The calculator uses the molarity formula:

Where:

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

Explanation: The formula calculates how many moles of solute are present per liter of solution.

3. Importance of Molarity Calculation

Details: Molarity is crucial for preparing solutions with precise concentrations, performing chemical reactions, and calculating dilutions in laboratory and industrial settings.

4. Using the Calculator

Tips: Enter the mass of solute in grams, molecular weight in g/mol, and volume in liters. 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. Molarity changes with temperature, molality doesn't.

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 convert to liters (divide by 1000) before calculation since molarity uses liters.

Q4: What if my solute is a liquid?
A: You'll need to know its density to convert volume to mass (mass = volume × density).

Q5: How precise should my measurements be?
A: For most laboratory work, measure mass to at least 3 decimal places (0.001 g) for accurate results.