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 is 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)
• \( n \) — Number of moles (mol)
• \( V \) — Volume of solution (L)

Explanation: This equation calculates the concentration of a solution by dividing the amount of substance (in moles) by the volume of the solution (in liters).

3. Importance of Molarity Calculation

Details: Molarity is crucial in preparing solutions with precise concentrations for experiments, medical treatments, and industrial processes. It's fundamental in stoichiometric calculations and understanding reaction kinetics.

4. Using the Calculator

Tips: Enter the number of moles and volume in liters. Both values must be positive numbers. The calculator will compute the molarity in moles per liter (mol/L).

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 convert grams to moles?
A: Divide the mass in grams by the molecular weight of the substance: moles = mass (g) / molecular weight (g/mol).

Q3: Can I use different volume units?
A: The calculator requires liters. Convert milliliters to liters by dividing by 1000 (1 mL = 0.001 L).

Q4: Why is molarity important in physiology?
A: Molarity is essential for understanding osmotic pressure, electrolyte balance, and drug concentrations in biological systems.

Q5: What is a typical molarity range for physiological solutions?
A: Physiological saline is approximately 0.15 M NaCl. Blood glucose is about 0.005 M. Various electrolytes exist in millimolar (mM) concentrations.