102 Experiment 12 Determination of Molar Mass by the Freezing Point Depression Method 2. The equation AT; = Kçm is only strictly applicable to very. solutions. 3. The f.p. lowering (AT;) only depends on the molality and is independent of the nature of the solute. This is known as a property. 4. A solid is melted then allowed to cool and the temperature of the liquid is recorded every 2 minutes. According to the plot below, the most probable f.p. of the solid is . °C. 75.5 75.0 74.5 74.0 73.5 73.0 72.5 72.0 71.5 71.0 70.5 4 6. 8. 10 12 14 16 18 22 24 26 Time (min) Temperature (°C) 20 (Figure created by David Samo.) р. 102

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102
Experiment 12 Determination of Molar Mass by the Freezing Point Depression Method
2. The equation ATf = Kfm is only strictly applicable to very
solutions.
3. The f.p. lowering (AT;) only depends on the molality and is independent of the nature of
the solute. This is known as a
property.
4. A solid is melted then allowed to cool and the temperature of the liquid is recorded every
2 minutes. According to the plot below, the most probable f.p. of the solid is
°C.
75.5
75.0
74.5
74.0
73.5
73.0
72.5
72.0
71.5
71.0
70.5
4
6.
10
12
14
16
18
20
22
24
26
Time (min)
Temperature (°C)
(Figure created by David Sarno.)
р. 102
Transcribed Image Text:102 Experiment 12 Determination of Molar Mass by the Freezing Point Depression Method 2. The equation ATf = Kfm is only strictly applicable to very solutions. 3. The f.p. lowering (AT;) only depends on the molality and is independent of the nature of the solute. This is known as a property. 4. A solid is melted then allowed to cool and the temperature of the liquid is recorded every 2 minutes. According to the plot below, the most probable f.p. of the solid is °C. 75.5 75.0 74.5 74.0 73.5 73.0 72.5 72.0 71.5 71.0 70.5 4 6. 10 12 14 16 18 20 22 24 26 Time (min) Temperature (°C) (Figure created by David Sarno.) р. 102
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