1. What is Molar Concentration?

Molar concentration, or molarity, is a measure of the concentration of a solute in a solution. It is defined as the number of moles of solute per liter of solution (mol/L). This calculator converts percentage concentration to molarity using density and molecular weight.

2. How Does the Calculator Work?

The calculator uses the molarity formula:

Where:

• \( M \) — Molarity (mol/L)
• \( \% \) — Percentage concentration (%)
• \( D \) — Density (g/mL)
• \( MW \) — Molecular weight (g/mol)

Explanation: The formula converts percentage concentration to molarity by accounting for the density of the solution and the molecular weight of the solute.

3. Importance of Molarity Calculation

Details: Accurate molarity calculation is essential for preparing chemical solutions, conducting experiments, and ensuring proper concentrations in various scientific and industrial applications.

4. Using the Calculator

Tips: Enter percentage concentration (%), density (g/mL), and molecular weight (g/mol). All values must be valid (greater than 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is density needed for this calculation?
A: Density is required to convert mass percentage to mass per volume, which is necessary for molarity calculation.

Q2: What units should I use for molecular weight?
A: Molecular weight should be in grams per mole (g/mol) for consistency with the formula.

Q3: Can I use this calculator for any solute?
A: Yes, as long as you have the correct percentage concentration, density, and molecular weight values.

Q4: Why multiply by 10 in the formula?
A: The factor of 10 converts percentage (per 100) to a decimal fraction and adjusts for units (g/mL to g/L).

Q5: What if my solution has multiple solutes?
A: This calculator is designed for single solute solutions. For multiple solutes, additional calculations are needed.