1. What is Molar Concentration?

Molar concentration (also called molarity) is a measure of the concentration of a solute in a solution, expressed as the number of moles of solute per liter of solution (mol/L or M). It's one of the most commonly used units of concentration in chemistry.

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 a substance are dissolved in each liter of solution.

3. Importance of Molar Concentration

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

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 mol/L.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between molarity and molality?
A: Molarity (M) is moles per liter of solution, while molality (m) is moles per kilogram of solvent. Molarity changes with temperature, molality doesn't.

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

Q3: What are typical molarity values?
A: Concentrations range from millimolar (mM, 10⁻³ M) to molar (M) for most lab solutions. Concentrated acids can be 10-18 M.

Q4: Why is molarity temperature dependent?
A: Because volume expands with temperature, the same number of moles in a larger volume gives lower molarity at higher temperatures.

Q5: How do I prepare a solution of specific molarity?
A: Dissolve the calculated moles of solute in less than the final volume, then dilute to exactly the target volume.