initial mole fraction

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Given these values, find the initial mole fraction and initial mass % of the solute (NaCl)

Solvent (water) weight: 200g

Solute (NaCl) weight: 39g

Solute (NaCl) Molar mass=58.44

moles of solute (NaCl) = .667

Expert Solution
Step 1

Molar mass of NaCl=58.44

Molar mass of water=18g

Mole fraction of each solute = Number of moles of that solute divided by the total number of moles of all solutes and the solvent.

So, Mole fraction of NaCl  =Number of moles of NaClTotal number of moles

Moles of NaCl=0.667 (given)

Moles of water =20018

=11.11 moles

Mole Fraction of NaCl=0.6670.667+11.11

Mole Fraction of NaCl=0.0567

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