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Question
Consider the following partially labelled figure for an ideal binary solution of benzene and toluene and answer the following questions:
Which laws are exemplified by the diagram?
Consider the following partially labelled figure for an ideal binary solution of benzene and toluene and answer the following questions:
Which laws are exemplified by the diagram?
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Solution
The correct option is C Both Raoult’s law and Dalton’s law
The graph has three curves where the vapour pressure is plotted vs the mole fraction of a solvent. Since curve 1 and 2 represent the individual vapour pressures of toluene and benzene it is in accordance with Dalton's law. Curve three represents the sum of vapour pressures of benzene and toulene i.e. vapour pressure of a solution of a volatile solute and solvent hence it is in accordance with Raoult's law.
The graph has three curves where the vapour pressure is plotted vs the mole fraction of a solvent. Since curve 1 and 2 represent the individual vapour pressures of toluene and benzene it is in accordance with Dalton's law. Curve three represents the sum of vapour pressures of benzene and toulene i.e. vapour pressure of a solution of a volatile solute and solvent hence it is in accordance with Raoult's law.
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