2| CHMI5ILL: SOLUBILITY OF A SALT Pre-laboratory Assignment For full credit show

Question

2| CHMI5ILL: SOLUBILITY OF A SALT Pre-laboratory Assignment For full credit show the details of each calculation below. Use more paper if needed. 1. Define these terms: a) solvent b) solution c) saturated solution 2. Consider a saturated solution formed when 17.5 g of a solute dissolve in 28.3 g of a solvent, giving a total solution volume of 27.8 mL. a) Express the solution concentration as a mass percent. b) Express the solubility as grams of solute per 100 g of solvent. c) Calculate the solution density in g/mL.

Explanation / Answer

)

a) solvent : large portion of the solution is called solvent

b) solution: homogeneous mixture of solute and solvent is called as solution.

c)Saturated solution:     A solution in which the maximum amount of solute has been dissolved. Any more solute added will sit as crystals on the bottom of the container.

2)
a)

(m/M) = 17.5/(17.5+28.3)
      = 0.382

(m/M)% = 38.2%

b) 28.3 gm of solvent is having 17.5 gm solute

   100 gm of solvent ................?
   = 61.84 gm/100gm of solvent.

c)
density = mass/vol
density = 45.8/27.8
density = 1.647 gm/ml

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