contestada

4. It is desired to prepare 0.5 L of a 0.1 M solution of NaCl
from a 1 M stock solution. How many milliliters of the
stock solution must be taken for the dilution?
5. Calculate the osmotic pressure of a 0.5 M sucrose
solution if the temperature is 298 K.

Respuesta :

Oseni

4) 0.05 L of the stock solution must be taken.

5) The osmotic pressure would be 12.23 atm

Miscellaneous calculations

4) Using the dilution equation: m1v1=m2v2

   m1 = 1M, m2 = 0.1M, v2 = 0.5L

      v1 = m2v2/m1 = 0.1 x 0.5/1 = 0.05 L

5) Using the formula: osmotic pressure = icRT

 Since sucrose does not ionize in water,  i = 1

  C = 0.5

  R = 0.0821

  T = 298

  Osmotic pressure = 1 x 0.5 x 0.0821 x 298 = 12.23 atm

More on osmotic pressure can be found here: https://brainly.com/question/12497098

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