1. What is Molarity?

Molarity (M) is a unit of concentration representing the number of moles of solute per liter of solution. It's one of the most common ways to express solution concentration in chemistry.

2. How Does the Calculator Work?

The calculator uses the molarity formula:

Where:

• \( M \) — Molarity (mol/L)
• \( m \) — Mass of solute (g)
• \( MW \) — Molecular weight of solute (g/mol)
• \( V \) — 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: Molarity is crucial for preparing solutions with precise concentrations, conducting chemical reactions, and performing quantitative analysis in chemistry and biology.

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 find molecular weight?
A: Sum the atomic weights of all atoms in the molecule. For example, water (H₂O) has MW = 2(1.008) + 15.999 = 18.015 g/mol.

Q3: Can I use milliliters for volume?
A: Yes, but convert to liters first (divide by 1000) since the formula requires volume in liters.

Q4: What are typical molarity values?
A: Concentrations range from millimolar (mM, 10⁻³ M) to molar (M) for most laboratory solutions.

Q5: How precise should my measurements be?
A: Use analytical balance for mass (±0.0001 g) and volumetric flask for volume (±0.1%) when preparing solutions.