The common laboratory solvent ethanol is often used to purify substances dissolved in it. The vapor...

The common laboratory solvent ethanol is often used to purify substances dissolved in it. The vapor pressure of ethanol, CH3CH2OH, is 54.68 mm Hg at 25 °C. In a laboratory experiment, students synthesized a new compound and found that when 30.10 grams of the compound was dissolved in 269.1 grams of ethanol, the vapor pressure of the solution was 53.72 mm Hg. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight of this compound? ethanol = CH3CH2OH = 46.07 g/mol. what is the molar weight?

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Expert Solution

The given problem is based on the colligative property which is relative lowering of vapor pressure.

The relative lowering of vapor pressure is depends on the mole fraction of the solute.

queen_honey_blossom answered 10 months ago

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