Question

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6) Place the following solutions in order of INCREASING normal boiling point. NOTE: substances that have LDF only have very low normal boiling points. Use the van’t Hoff factor in the limit of infinite dilution. There are 7 substances.

NOTE: the order format MUST be: Q < R < S < T, etc.

            0.050 m CaCl₂,            0.15 m NaCl,               Cl₂,                  0.10 m HCl,

            0.050 m HCOOH,       0.10 m C₁₂H₂₂O₁₁,                              CH₃OH

7) Determine the Molarity (M) of chloride ions a solution formed from 6.6625 g of

iron(III) chloride in 250.0 mL of total solution const. T). Assume complete dissociation.

a) 5.314           b) 0.1643            c) 0.2348          d) 0.4929         e) 0.1392         f) 2.052

8) What is the Molar Mass of a nonvolatile nonelectrolyte if 5.332 g of it is dissolved in 50.0 g of water at P = 1.00 atm and the freezing point of the solution is recorded as –2.24 ^oC?

K_f H₂O = 1.86 ^oC/m

a) 58.3             b) 64.3             c) 312              d) 42.5           e) 88.5                        f) 105

Answer 1