1. What is Molarity?

Molarity (M) is a measure of concentration representing the number of moles of a solute per liter of solution. It's one of the most common units used in chemistry to quantify solution concentration.

2. How Does the Calculator Work?

The calculator uses the molarity formula:

Where:

• \( M \) — Molarity (mol/L)
• \( conc \) — 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: Accurate molarity calculations are essential for preparing solutions, conducting experiments, and performing quantitative chemical analysis.

4. Using the Calculator

Tips: Enter concentration in g/L and molecular weight in 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 while molality is not.

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 different concentration units?
A: The calculator expects g/L. For mg/mL, the numbers are equivalent since 1 mg/mL = 1 g/L.

Q4: What about very dilute solutions?
A: For very low concentrations, consider using millimolar (mM) or micromolar (μM) units (1 M = 1000 mM = 1,000,000 μM).

Q5: How accurate is this calculation?
A: The calculation is mathematically exact. Accuracy depends on the precision of your concentration measurement and molecular weight value.