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 concentration units in chemistry.

2. How Does the Calculator Work?

The calculator uses the molarity formula:

Where:

• \( M_{stock} \) — Molarity of stock solution (mol/L)
• \( n \) — Amount of substance (moles)
• \( V_{stock} \) — Volume of solution (liters)

Explanation: This formula calculates the concentration of a solution by dividing the number of moles of solute by the volume of the solution in liters.

3. Importance of Molarity Calculation

Details: Accurate molarity calculation is essential for preparing solutions with precise concentrations, which is critical for chemical reactions, biological assays, and various laboratory procedures.

4. Using the Calculator

Tips: Enter the amount of substance in moles and the volume of solution in liters. Both values must be positive numbers. The calculator will compute the molarity in mol/L.

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, while molality is not.

Q2: How do I convert grams to moles?
A: Divide the mass in grams by the molecular weight of the substance: moles = mass (g) / molecular weight (g/mol).

Q3: Can I use different volume units?
A: The calculator requires liters. Convert milliliters to liters by dividing by 1000 (1 mL = 0.001 L).

Q4: What is a stock solution?
A: A stock solution is a concentrated solution that will be diluted to a lower concentration for actual use.

Q5: Why is accurate molarity important?
A: Precise concentration measurements are crucial for reproducible experiments, accurate chemical reactions, and valid scientific results.