Automotive antifreeze consists of ethylene glycol, CH2OHCH2OH, a nonvolatile nonelectrolyte Calcula

Automotive antifreeze consists of ethylene glycol, CH2(OH)CH2(OH), a nonvolatile nonelectrolyte. Calculate the boiling point and freezing point of a 15.0% mass solution of ethylene glycol in water Solution Moles of solute = 1562.07 = 0.2417 mol Mass of solvent = 85 g = 0.085 kg Molality (m) = 0.241 mol0.085 kg = 2.843 m i = 1 (ethylene glycol is a molecular substance and does not dissociate) Kb and Kf of the solvent (water) are constants that are known ΔTb = iKb m = 1.45°C Boiling point of solution = 100 + 1.45 = 101.45°C ΔTf = iKf m = 5.29°C Freezing point of solution = 0 - 5.29 = -5.29°C
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