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

Explanation: The formula converts grams of solute 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 with precise concentrations, which is critical for chemical reactions, biological assays, and medical applications.

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 is temperature-dependent (volume changes with temperature).

Q2: How do I convert molarity to mass?
A: Rearrange the formula: mass = M × MW × V. You'll need to know the desired molarity, molecular weight, and volume.

Q3: What if my volume is in mL?
A: Convert mL to L by dividing by 1000 before using the calculator (1 L = 1000 mL).

Q4: Why is molecular weight important?
A: Molecular weight converts between grams and moles, which is necessary for molarity calculations.

Q5: Can I use this for dilutions?
A: Yes, this calculator can help determine the molarity of stock solutions before dilution.