Solutions and Colligative Properties - Result Question 57

####28. What is the molarity and molality of a 13 solution (by weight) of sulphuric acid with a density of 1.02g/mL ? To what volume should 100mL of this solution be diluted in order to prepare a 1.5N solution?

(1978,2M)

(a) 0.027mmHg

(b) 0.031mmHg

(c) 0.017mmHg

(d) 0.028mmHg

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Solution:

  1. Let us consider 1.0L of solution.

 Weight of solution =1000×1.02=1020g  Weight of H2SO4=1020×13100=132.60g  Weight of H2O=1020132.60=887.40g  Molarity =132.6098=1.353M  Molality =132.6098×1000887.40=1.525m  Normality =2×M=2.706 2.706×100=1.5V V=180.40mL

Topic 2 Colligative Properties



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