Relative Lowering of Vapour Pressure Calculator

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✖The Vapour Pressure of Pure Solvent is the vapour pressure of solvent prior to addition of solute.ⓘ Vapour Pressure of Pure Solvent [p_o]			+10% -10%
✖The Vapour Pressure of Solvent in Solution is the vapour pressure of solvent post addition of solute.ⓘ Vapour Pressure of Solvent in Solution [p]			+10% -10%

✖The Relative Lowering of Vapour Pressure is the lowering of vapour pressure of pure solvent on addition of solute.ⓘ Relative Lowering of Vapour Pressure [Δp]

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Relative Lowering of Vapour Pressure Solution

STEP 0: Pre-Calculation Summary

Formula Used

Relative Lowering of Vapour Pressure = (Vapour Pressure of Pure Solvent-Vapour Pressure of Solvent in Solution)/Vapour Pressure of Pure Solvent
Δp = (p_o-p)/p_o
This formula uses 3 Variables

Variables Used

Relative Lowering of Vapour Pressure - The Relative Lowering of Vapour Pressure is the lowering of vapour pressure of pure solvent on addition of solute.
Vapour Pressure of Pure Solvent - (Measured in Pascal) - The Vapour Pressure of Pure Solvent is the vapour pressure of solvent prior to addition of solute.
Vapour Pressure of Solvent in Solution - (Measured in Pascal) - The Vapour Pressure of Solvent in Solution is the vapour pressure of solvent post addition of solute.

STEP 1: Convert Input(s) to Base Unit

Vapour Pressure of Pure Solvent: 2000 Pascal --> 2000 Pascal No Conversion Required
Vapour Pressure of Solvent in Solution: 1895.86 Pascal --> 1895.86 Pascal No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Δp = (p_o-p)/p_o --> (2000-1895.86)/2000

Evaluating ... ...

Δp = 0.05207

STEP 3: Convert Result to Output's Unit

0.05207 --> No Conversion Required

FINAL ANSWER

0.05207 <-- Relative Lowering of Vapour Pressure

(Calculation completed in 00.004 seconds)

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Created by Prerana Bakli

University of Hawaiʻi at Mānoa (UH Manoa), Hawaii, USA

Prerana Bakli has created this Calculator and 800+ more calculators!

Verified by Akshada Kulkarni

National Institute of Information Technology (NIIT), Neemrana

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< Relative Lowering of Vapour Pressure Calculators

Molecular Mass of Solvent given Relative Lowering of Vapour Pressure

LaTeX Go Molecular Mass Solvent = ((Vapour Pressure of Pure Solvent-Vapour Pressure of Solvent in Solution)*1000)/(Molality*Vapour Pressure of Pure Solvent)

Relative Lowering of Vapour Pressure

LaTeX Go Relative Lowering of Vapour Pressure = (Vapour Pressure of Pure Solvent-Vapour Pressure of Solvent in Solution)/Vapour Pressure of Pure Solvent

Mole Fraction of Solute given Vapour Pressure

LaTeX Go Mole Fraction of Solute = (Vapour Pressure of Pure Solvent-Vapour Pressure of Solvent in Solution)/Vapour Pressure of Pure Solvent

Mole Fraction of Solvent given Vapour Pressure

LaTeX Go Mole Fraction of Solvent = Vapour Pressure of Solvent in Solution/Vapour Pressure of Pure Solvent

< Important Formulas of Colligative Properties Calculators

Osmotic Pressure given Depression in Freezing Point

LaTeX Go Osmotic Pressure = (Molar Enthalpy of Fusion*Depression in Freezing Point*Temperature)/(Molar Volume*(Solvent Freezing Point^2))

Osmotic Pressure given Concentration of Two Substances

LaTeX Go Osmotic Pressure = (Concentration of Particle 1+Concentration of Particle 2)*[R]*Temperature

Osmotic Pressure for Non Electrolyte

LaTeX Go Osmotic Pressure = Molar Concentration of Solute*[R]*Temperature

Osmotic Pressure given Density of Solution

LaTeX Go Osmotic Pressure = Density of Solution*[g]*Equilibrium Height

Relative Lowering of Vapour Pressure Formula

LaTeX Go

Relative Lowering of Vapour Pressure = (Vapour Pressure of Pure Solvent-Vapour Pressure of Solvent in Solution)/Vapour Pressure of Pure Solvent
Δp = (p_o-p)/p_o

What causes the Relative Lowering Of Vapour Pressure?

This lowering in vapour pressure is due to the fact that after the solute was added to the pure liquid (solvent), the liquid surface now had molecules of both, the pure liquid and the solute. The number of solvent molecules escaping into vapour phase gets reduced and as a result the pressure exerted by the vapour phase is also reduced. This is known as relative lowering of vapour pressure. This decrease in vapour pressure depends on the amount of non-volatile solute added in the solution irrespective of its nature and hence it is one of the colligative properties.

How to Calculate Relative Lowering of Vapour Pressure?

Relative Lowering of Vapour Pressure calculator uses Relative Lowering of Vapour Pressure = (Vapour Pressure of Pure Solvent-Vapour Pressure of Solvent in Solution)/Vapour Pressure of Pure Solvent to calculate the Relative Lowering of Vapour Pressure, The Relative Lowering of Vapour Pressure is the relative measure of lowering of vapour pressure of solvent post addition of solute. Relative Lowering of Vapour Pressure is denoted by Δp symbol.

How to calculate Relative Lowering of Vapour Pressure using this online calculator? To use this online calculator for Relative Lowering of Vapour Pressure, enter Vapour Pressure of Pure Solvent (p_o) & Vapour Pressure of Solvent in Solution (p) and hit the calculate button. Here is how the Relative Lowering of Vapour Pressure calculation can be explained with given input values -> 0.05207 = (2000-1895.86)/2000.

FAQ

What is Relative Lowering of Vapour Pressure?

The Relative Lowering of Vapour Pressure is the relative measure of lowering of vapour pressure of solvent post addition of solute and is represented as Δp = (p_o-p)/p_o or Relative Lowering of Vapour Pressure = (Vapour Pressure of Pure Solvent-Vapour Pressure of Solvent in Solution)/Vapour Pressure of Pure Solvent. The Vapour Pressure of Pure Solvent is the vapour pressure of solvent prior to addition of solute & The Vapour Pressure of Solvent in Solution is the vapour pressure of solvent post addition of solute.

How to calculate Relative Lowering of Vapour Pressure?

The Relative Lowering of Vapour Pressure is the relative measure of lowering of vapour pressure of solvent post addition of solute is calculated using Relative Lowering of Vapour Pressure = (Vapour Pressure of Pure Solvent-Vapour Pressure of Solvent in Solution)/Vapour Pressure of Pure Solvent. To calculate Relative Lowering of Vapour Pressure, you need Vapour Pressure of Pure Solvent (p_o) & Vapour Pressure of Solvent in Solution (p). With our tool, you need to enter the respective value for Vapour Pressure of Pure Solvent & Vapour Pressure of Solvent in Solution and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Relative Lowering of Vapour Pressure?

In this formula, Relative Lowering of Vapour Pressure uses Vapour Pressure of Pure Solvent & Vapour Pressure of Solvent in Solution. We can use 3 other way(s) to calculate the same, which is/are as follows -

Relative Lowering of Vapour Pressure = Number of Moles of Solute/Number of Moles of Solvent
Relative Lowering of Vapour Pressure = Number of Moles of Solute/(Number of Moles of Solute+Number of Moles of Solvent)
Relative Lowering of Vapour Pressure = (Molality*Molecular Mass Solvent)/1000

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