Solutions Worksheet 1: 1. Explain, at the microscopic level, why the boiling point of a solution is higher than the pure solvent. 2. Arrange the following solutions in order of decreasing freezing point: 0.10 m Na3PO4, 0.35 m NaCl, 0.20 m CaCl2, and 0.15 m C2H12O6 3. A 2.5 g sample of water was obtained from the Tuckasegee River in Cullowhee, NC and was found to contain 3 g of Pb+4. Determine the concentration of Pb+4 in parts per million, and parts per billion. 4. Which of the following structures would be most soluble in hexane and why? CH3 O H2N OH NH2 O H3C O OH NH2 HO OH NH2 5. Explain how a scientist could increase the solubility of gases and solids; what methods could they use? Be specific and clear in your explanation of each.

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