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 of concentration in chemistry.

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 chemical solutions, performing stoichiometric calculations, and conducting experiments that require precise concentrations of reactants.

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, 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 solutions with multiple solutes?
A: This calculates molarity for a single solute. For multiple solutes, calculate each one separately.

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

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