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 in chemistry for quantifying solution concentrations.

2. How Does the Calculator Work?

The calculator uses the molarity formula:

Where:

• \( M \) — Molarity (mol/L)
• \( C \) — Concentration (g/L)
• \( MW \) — Molecular weight (g/mol)

Explanation: The formula converts mass concentration to molar concentration by dividing by the molecular weight of the solute.

3. Importance of Molarity Calculation

Details: Molarity is essential for preparing solutions with precise concentrations, performing stoichiometric calculations, and conducting experiments that require specific reagent concentrations.

4. Using the Calculator

Tips: Enter concentration in grams per liter (g/L) and molecular weight in grams per mole (g/mol). Both 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), while molality is not.

Q2: How do I find the molecular weight of a compound?
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 this for mixtures?
A: This calculator is for single-component solutions. For mixtures, you'd need to calculate each component separately.

Q4: What if my concentration is in mg/mL?
A: Convert to g/L by multiplying by 1000 (since 1 mg/mL = 1 g/L).

Q5: How precise should my molecular weight be?
A: Use at least 2 decimal places for accurate calculations, especially with small molecules.