Chemistry

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How many grams of sucrose (C12H22O11)
must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2?
Answer in units of g.

  • Chemistry -

    MOL FRACTION H2O + MOL FRACTION C12H22O11 = 1
    THEN
    MOL FRACTION H2O = 0.8
    MOL FRACTION H2O = MOL H20 / TOTAL MOL
    MOL H2O = 200/18 = 11.1
    THEN
    0.8=11.1/(11.1+MOL C12H22O11)
    MOL C12H22O11 = 0.26MOL
    MASS OF C12H22O11 = MOL * MOLAR MASS
    MASS OF C12H22O11 =0.26*342
    MASS OF C12H22O11 = 88.92 GRAM

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