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:

• Mass — Amount of 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 how many moles of solute are present in each liter of solution.

3. Importance of Molarity Calculation

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

4. Using the Calculator

Tips: Enter mass 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 you must convert to liters first (divide by 1000) since molarity is defined per liter.

Q4: What if my solute is a liquid?
A: For liquids, you can calculate mass from density (mass = volume × density) or use molarity directly if you know moles and volume.

Q5: How precise should my measurements be?
A: For most laboratory work, 4 significant figures is sufficient. Analytical work may require higher precision.