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What is the freezing point of 0.1 m glucose solution in water? For water Kf is 1.86 K kg/mol?
- a)1 K
- b)6.55 °C
- c)-0. 186 °C
- d)0 K
Correct answer is option 'C'. Can you explain this answer?
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What is the freezing point of 0.1 m glucose solution in water? For wat...
The correct answer is option C
Since glucose is a nonelectrolyte the van’t Hoff factor i = 1
ΔTf= iKfm
=1.86 x 0.1
=0.186
0oC – Tf =0.186
Tf= - 0.186oC
Since glucose is a nonelectrolyte the van’t Hoff factor i = 1
ΔTf= iKfm
=1.86 x 0.1
=0.186
0oC – Tf =0.186
Tf= - 0.186oC
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What is the freezing point of 0.1 m glucose solution in water? For wat...
Given:
Molarity of glucose solution (m) = 0.1 m
Kf for water = 1.86 K kg/mol
Freezing point depression (ΔTf) is given by the formula:
ΔTf = Kf × m
Substituting the values:
ΔTf = 1.86 K kg/mol × 0.1 mol/kg
ΔTf = 0.186 K
The freezing point of the solution is lower than the freezing point of pure water by ΔTf.
Freezing point of water = 0°C
Freezing point of 0.1 m glucose solution = 0°C - ΔTf
Freezing point of 0.1 m glucose solution = 0°C - 0.186 K
Freezing point of 0.1 m glucose solution = -0.186°C
Therefore, the freezing point of the 0.1 m glucose solution in water is -0.186°C.
Molarity of glucose solution (m) = 0.1 m
Kf for water = 1.86 K kg/mol
Freezing point depression (ΔTf) is given by the formula:
ΔTf = Kf × m
Substituting the values:
ΔTf = 1.86 K kg/mol × 0.1 mol/kg
ΔTf = 0.186 K
The freezing point of the solution is lower than the freezing point of pure water by ΔTf.
Freezing point of water = 0°C
Freezing point of 0.1 m glucose solution = 0°C - ΔTf
Freezing point of 0.1 m glucose solution = 0°C - 0.186 K
Freezing point of 0.1 m glucose solution = -0.186°C
Therefore, the freezing point of the 0.1 m glucose solution in water is -0.186°C.
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