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Mole Fraction

Mole Fraction. Convert. Convert 1.2 M CuSO 4 solution to mass percent, if the solution has a density 1.1 g/mL. 1.2 M= 1.2 mol CuSO 4 / 1 L solution 1.2 mol x159.62 g / 1 mol =191.544 g 1 L = 1000 mL x 1.1 g/1 mL = 1100 g of solution Mass percent = 191.544 g / 1100 g x100 = 17 %.

elizabeth-kirk
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Mole Fraction

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  1. Mole Fraction

  2. Convert • Convert 1.2 M CuSO4 solution to mass percent, if the solution has a density 1.1 g/mL. • 1.2 M= 1.2 mol CuSO4 / 1 L solution • 1.2 mol x159.62 g / 1 mol =191.544 g • 1 L = 1000 mL x 1.1 g/1 mL = 1100 g of solution • Mass percent = 191.544 g / 1100 g x100 = 17 %

  3. Parts per thousand/million etc. • Mass percent can also be called parts per hundred (although it never is) • Parts per thousand is the same as mass percent except instead of multiplying by a 100 you multiply by 1000. • Parts per million is multiplied by 1,000,000 • Pollen counts are normally reported in this

  4. Mole Fraction • (these calculations are not in your book) • Mole Fraction or molar fraction is represented by the Greek letter chi,  •  = mole solute/mole solution

  5. Convert • Convert a 2.3 M solution of aluminum nitrate Al(NO3)3 to mole fraction of aluminum nitrate if the density of the solution is 1.14 g/mL. • 2.3 M = 2.3 mol Al(NO3)3 /1 L solution • 2.3 mol x 213.01 g/ 1 mol = 489.923 g Al(NO3)3 • 1 L = 1000 mL x 1.14 g/1 mL = 1140 g solution • 1140 g - 489.923g = 650.077 g water • 650.077 g x 1 mol /18.016 g = 36.0833 mol • X= 2.3 mol/ (2.3+36.0833) mol = .060

  6. Another Convert a 1.4 M solution of strontium sulfate, SrSO4, to mole fraction of strontium sulfate if the density of the solution is 1.24 g/mL.

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