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COMEDK2019ChemistrySome Basic Concepts of Chemistry

The mass of glucose to be dissolved in 50 ~g of water to get 0.3 molal solution is

Options

  1. A27 ~g
  2. B0.27 ~g
  3. C2.7 ~g
  4. D5.4 ~g

Correct answer

C. 2.7 ~g

Step-by-step solution

Molecular mass of glucose =180 ~g / mol Mass of water =50 ~g =0.05 ~kg Molality (m)= Mass Molar mass mass of solvent ( in kg) 0.3= Mass 160 0.05 Mass =2.7 ~g

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