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Which of the following can be measured by the Ostwald-Walker dynamic method?
- A Relative lowering of vapour pressure
- B Lowering of vapour pressure
- C Vapour pressure of the solvent
- D All of the above
Answer & Solution
Correct Answer
(D) All of the above
Step-by-step Solution
Detailed 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 contains solvent. The loss of weight in bulb 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 \(=\frac{\text { lowering of vapour pressure }}{\text { vapour pressure of solvent }}\)
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 contains solvent. The loss of weight in bulb 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 \(=\frac{\text { lowering of vapour pressure }}{\text { vapour pressure of solvent }}\)
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