An aqueous solution of ethyl alcohol is found to be 10/9 molal. If the density of the alcohol solution is 0.8 g/cc, find mole fraction and molarity of solution with respect to ethyl alcohol.
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10/9=1.111 molal
this means you have 1.11mole of ethanol by kg of water.
Molar mass of water is 18g . so 1kg of water contains 1000/18=55.56moles of water
mole fraction of ethanol is given by
number of moles of ethanol/(moles of ethanol+moles of water) =0.0196
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