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)
• \( Density \) — Density of the solution (g/mL)
• \( MW \) — Molecular weight of the solute (g/mol)

Explanation: The formula converts density (g/mL) to g/L by multiplying by 1000, then divides by molecular weight to convert grams to moles per liter.

3. Importance of Molarity Calculation

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

4. Using the Calculator

Tips: Enter density in g/mL and molecular weight in g/mol. All values must be positive numbers. For pure substances, use the density of the pure liquid.

5. Frequently Asked Questions (FAQ)

Q1: When can I use this formula?
A: This formula works for pure substances or when the solution contains only one solute at high concentration.

Q2: What if my solution has multiple solutes?
A: For solutions with multiple solutes, you would need to know the mass fraction or percentage composition of each component.

Q3: Why multiply density by 1000?
A: We multiply by 1000 to convert g/mL to g/L, since molarity is defined per liter of solution.

Q4: How accurate is this calculation?
A: The accuracy depends on the precision of your density and molecular weight measurements. For dilute solutions, other methods may be more accurate.

Q5: Can I use this for gases?
A: No, this formula is designed for liquid solutions. Gases require different calculations using the ideal gas law.