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 and physiology.

2. How Does the Calculator Work?

The calculator uses the molarity formula:

Where:

• \( M \) — Molarity (mol/L)
• \( m \) — Mass of solute (grams)
• \( MW \) — Molecular weight of solute (g/mol)
• \( V \) — Volume of solution (liters)

Explanation: The formula converts mass to moles (using molecular weight) and divides by volume to get concentration in moles per liter.

3. Importance of Molarity Calculation

Details: Accurate molarity calculations are essential for preparing solutions in laboratory and clinical settings, ensuring proper concentrations for experiments and medical treatments.

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 changes with temperature, molality doesn't.

Q2: How do I find molecular weight?
A: Molecular weight is the sum of atomic weights of all atoms in the molecule. It can be found in chemical databases or calculated from the chemical formula.

Q3: What if my volume is in milliliters?
A: Convert milliliters to liters by dividing by 1000 before entering the value (1 mL = 0.001 L).

Q4: Can this calculator be used for dilutions?
A: Yes, you can use it to calculate the molarity of stock solutions before dilution.

Q5: How precise should my measurements be?
A: For most applications, 2-4 significant figures are sufficient, but follow your specific protocol requirements.