Calculate the boiling point of a solution of 0.200 m NaCl in water (k_b = 0.512 ° C/m) if the van't Hoff factor for this solution is 1.91.

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The boiling point elevation can be calculated using the formula ΔTb = i * Kb * m, where ΔTb is the boiling point elevation, i is the van't Hoff factor, Kb is the ebullioscopic constant, and m is the molality of the solution. Substituting the given values: ΔTb = 1.91 * 0.512 °C/m * 0.200 m = 0.195584 °C. The boiling point of the solution is then 100 °C (boiling point of pure water) + 0.195584 °C ≈ 100.196 °C.

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