Question:
Which of the following can be measured by the Ostwald-Walker dynamic method ?
Which of the following can be measured by the Ostwald-Walker dynamic method ?
Updated On: Apr 2, 2024
- Relative lowering of vapour pressure
- Lowering of vapour pressure
- Vapour pressure of the solvent
- all of these
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The Correct Option is A
Solution and Explanation
By Ostwald-Walker dynamic method, the relative lowering of vapour pressure, lowering of vapour pressure and vapour pressure of the solvent, all can be measured. In this method, the apparatus used, contains two bulbs : bulb A contains solution and bulb $B$ contains solvent. The loss of weight in bulb $B$ gives the lowering of vapour pressure and total loss of weight in both the tubes gives the vapour pressure of the solvent and
Relative lowering of vapour pressure
$=\frac{\text { lowering of vapour pressure }}{\text { vapour pressure of solvent }}$
Relative lowering of vapour pressure
$=\frac{\text { lowering of vapour pressure }}{\text { vapour pressure of solvent }}$
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Concepts Used:
Solutions
A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm.
For example, salt and sugar is a good illustration of a solution. A solution can be categorized into several components.
Types of Solutions:
The solutions can be classified into three types:
- Solid Solutions - In these solutions, the solvent is in a Solid-state.
- Liquid Solutions- In these solutions, the solvent is in a Liquid state.
- Gaseous Solutions - In these solutions, the solvent is in a Gaseous state.
On the basis of the amount of solute dissolved in a solvent, solutions are divided into the following types:
- Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
- Saturated Solution- A solution in which no solute can be dissolved after reaching a certain amount of temperature is known as an unsaturated saturated solution.
- Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.