Multiple choice

214.2 g of sugar syrup contains 34.2 g of sugar. Calculate the molality of the solution?

  1. 0.655 m

  2. 0.755 m

  3. 0.555 m

  4. 0.455 m

  5. 0.355 m
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mass of sugar = 34.2 g No. of moles of sugar = (34.2 / Mol. mass) = 34.2 / 342 =0.1 Mass of water = (214.2 – 43.2) = 180 g = 0.18 kg Molality (m) = (No. of moles of sugar / Mass of H2O in kg) = 0.1 / 0.18 = 0.555 m, which is the required solution of the given problem. Hence, this is a correct option.

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