Problem: Calculate the mole fractions of methanol, CH3OH; ethanol, C2H5OH; and water in a solution that is 40% methanol, 40% ethanol, and 20% water by mass. (Assume the data are good to two significant figures.)

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FREE Expert Solution

Mole Fraction (X) relates the moles of solute and solvent within a solution:

mole fraction (X)=mole of solutemole of solution

Assuming that we have 100 g:

  • 40% methanol → 40 g CH3OH
  • 40% ethanol → 40 g C2H5OH
  • 20% water → 20 g H2O
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Problem Details

Calculate the mole fractions of methanol, CH3OH; ethanol, C2H5OH; and water in a solution that is 40% methanol, 40% ethanol, and 20% water by mass. (Assume the data are good to two significant figures.)

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Based on our data, we think this problem is relevant for Professor Zhang's class at SCAR.

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Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.