Level 2 – Freezing Point Depression Solvent Normal Boilin…
Level 2 – Freezing Point Depression Solvent Normal Boiling Point (oC) Kb (oC/m) Normal Freezing Point (oC) Kf (oC/m) Water 100 0.22 0.0 1.86 Benzene 80.1 2.53 5.5 5.12 Ethanol 78.4 1.22 -114. 1.99 Carbon Tetrachloride 76.8 5.02 -22.3 29.8 Chloroform 61.2 3.63 -63.5 4.68 Freezing point depression was studied via an experiment in which: 2 mols of Sodium Chloride was added to 5 mL of distilled H2O. (Trial 1) 4 mols of Ethanol were added to 5mL of distilled H2O(Trial 2) The experiment consulted the table above for all necessary values. (see previous problem) The solution and pure solvent density are the same. The solute and solvent are perfectly solubility. Given this setup, we can expect the absolute value of ΔTf for Trial 2 vs Trial 1 to be _______________.Hint: In other words, is the ΔTf for Trial 2 higher, lower, unchanged, or indeterminate compared to Trial 1.