We are asked to use the colligative property of vapor pressure to determine the vapor pressure of the solution.
We shall follow these steps in solving the problem:
Step 1: Determine the number of moles of ethanol and water.
Step 2: Determine the mole fraction of ethanol and water.
Step 3: Compute for the vapor pressure of the solution. The vapor pressure can be calculated as:
At 63.5oC the vapor pressure of H2O is 175 torr, and that of ethanol (C2H5OH) is 400 torr. A solution is made by mixing equal masses of H2O and C2H5OH.
Assuming ideal-solution behavior, what is the vapor pressure of the solution at 63.5oC?
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