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 and biology.

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)
• \( volume \) — Volume of solution (L)

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

3. Importance of Molarity Calculation

Details: Accurate molarity calculations are essential for preparing solutions with precise concentrations, which is crucial for experiments, chemical reactions, and biological assays.

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 convert molarity to other concentration units?
A: For weight/volume percent: (M × MW × 0.1). For ppm: (M × MW × 1000).

Q3: Why is molecular weight important?
A: MW converts between grams and moles, allowing you to relate mass to number of molecules.

Q4: Can I use different volume units?
A: The calculator expects liters. Convert mL to L by dividing by 1000, or µL to L by dividing by 1,000,000.

Q5: How precise should my measurements be?
A: Use the highest precision available for mass (analytical balance) and measure volumes with graduated cylinders or pipettes appropriate for your needed precision.