1. What is Molar Concentration?

Molar concentration (also called molarity) is a measure of the concentration of a chemical species, particularly a solute in a solution, in terms of amount of substance per unit volume of solution. In chemistry, the most commonly used unit for molarity is the number of moles per liter.

2. How Does the Calculator Work?

The calculator uses the molar concentration formula:

Where:

• \( M \) — Molar concentration (mol/L)
• \( n \) — Amount of substance (moles)
• \( V \) — Volume of solution (liters)

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

3. Importance of Molar Concentration

Details: Molarity is a fundamental concept in chemistry used in stoichiometric calculations, preparing solutions, and quantitative analysis. It's essential for chemical reactions where precise concentrations are required.

4. Using the Calculator

Tips: Enter the amount of substance in moles and the volume in liters. Both values must be positive numbers. The calculator will compute the molar concentration in moles per liter (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 changes with temperature, molality doesn't.

Q2: How do I prepare a 1 M solution?
A: Dissolve 1 mole of solute in enough solvent to make exactly 1 liter of solution.

Q3: What are common units for molar concentration?
A: The SI unit is mol/m³, but mol/L (or M) is most commonly used in chemistry.

Q4: Can molarity be used for gases?
A: Yes, but it's more common to use partial pressures or mole fractions for gases.

Q5: How does dilution affect molarity?
A: Diluting a solution (adding more solvent) decreases its molarity proportionally.