1. What is Moles of Solute given Osmotic Pressure?

Definition: This calculator determines the number of moles of solute in a solution based on its osmotic pressure, volume, and temperature.

Purpose: It helps chemists and researchers understand solution properties and perform accurate dilutions in laboratory settings.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( n \) — Moles of solute (mol)
• \( \pi \) — Osmotic pressure (Pascals)
• \( V \) — Volume of solution (cubic meters)
• \( [R] \) — Universal gas constant (8.314 J/mol·K)
• \( T \) — Temperature (Kelvin)

Explanation: The formula derives from the osmotic pressure equation π = nRT/V, rearranged to solve for moles of solute.

3. Importance of Moles of Solute Calculation

Details: Knowing the moles of solute is crucial for preparing solutions with precise concentrations, understanding colligative properties, and conducting chemical analyses.

4. Using the Calculator

Tips: Enter the osmotic pressure in Pascals, solution volume in cubic meters, and temperature in Kelvin. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is osmotic pressure?
A: Osmotic pressure is the minimum pressure required to prevent solvent flow across a semipermeable membrane due to concentration differences.

Q2: Why is temperature important in this calculation?
A: Temperature affects molecular motion and thus the osmotic pressure. Calculations must use absolute temperature (Kelvin).

Q3: What units should I use for volume?
A: The calculator expects cubic meters (m³). For liters, divide by 1000 (1 L = 0.001 m³).

Q4: Can I use mmHg for pressure?
A: No, the calculator requires Pascals. Convert mmHg to Pa (1 mmHg ≈ 133.322 Pa).

Q5: What is the universal gas constant [R]?
A: It's a physical constant (8.314 J/mol·K) that relates energy scales to temperature.