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Moles of Solvent in Dilute Solution given Relative Lowering of Vapour Pressure Calculator

Formula Used:

\[ N = \frac{n \times p_o}{p_o - p} \]

mol
Pa
Pa
mol

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1. What is Moles of Solvent in Dilute Solution?

Definition: This calculator determines the number of moles of solvent in a dilute solution based on the relative lowering of vapour pressure.

Purpose: It helps chemists and researchers understand solution properties and colligative effects in dilute solutions.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ N = \frac{n \times p_o}{p_o - p} \]

Where:

Explanation: The formula relates the change in vapour pressure to the mole fraction of solute in the solution.

3. Importance of This Calculation

Details: Understanding vapour pressure lowering is crucial for studying colligative properties, designing chemical processes, and predicting solution behavior.

4. Using the Calculator

Tips: Enter the moles of solute, vapour pressure of pure solvent, and vapour pressure of solvent in solution. All values must be > 0 and \( p_o > p \).

5. Frequently Asked Questions (FAQ)

Q1: What is relative lowering of vapour pressure?
A: It's the ratio of vapour pressure lowering to the vapour pressure of pure solvent, a colligative property.

Q2: Why must the solution be dilute?
A: The formula assumes ideal behavior which is only valid for dilute solutions where solute-solute interactions are negligible.

Q3: What units should I use?
A: Moles should be in mol and pressure in Pascals (Pa), though any consistent pressure units will work.

Q4: How accurate is this calculation?
A: Very accurate for ideal, dilute solutions. Accuracy decreases as concentration increases.

Q5: Can I use this for non-volatile solutes?
A: Yes, this is particularly useful for solutions with non-volatile solutes where \( p \) is significantly lower than \( p_o \).

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