Temperati ADDITIONAL PROBLEMS 9.3 SOLUTIONS AND SOLUBILITY (SECTIONS 9.1 9.32 Wh

Question

Temperati ADDITIONAL PROBLEMS 9.3 SOLUTIONS AND SOLUBILITY (SECTIONS 9.1 9.32 What is the difference between a homogen ous mixture and a heterogeneous one? 9.33 How can you tell a solution from a colloid? 9.34 What characteristic of water allows it to dissolve ionic solids? Why does water not dissolve motor oil? Which of the following are solutions? (a) Italian salad dressing (b) Rubbing alcohol (c) Algae in pond water 9.35 9.36 (d) Mouthwash 9.37 Based on the predominant intermolecular forces, which of the following pairs of liquids are likely to be miscible? (a) H,SO4 and H 0 (b) C&His; and CoH (d) CS2 and CCl4 (c) CH,Clh and H,0

Explanation / Answer

9.32. Homogeneous mixture will have solute dispersed in the solvent evenly whereas in heterogeneous mixture the solute is distributed unevenly.

9.33. In solution the solute and solvent are in same phase. In colloid there will be two separate phases the dispersed phase and the continuous phase.

9.34. The polarity of water allows it to dissolve ionic solids.

9.35. Water is polar while motor oil is nonpolar. Like dissolves like.

9.36. Rubbing alcohol and mouthwash are solutions.

9.37. (a) H2SO4 and H2O (both polar)

b) C8H18 and C6H6 (Both nonpolar)

d) CS2 and CCl4 (both nonpolar)

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