Molal freezing point constant of water is:
Correct answer: A. 1.86
- A. 1.86
- B. 2.86
- C. 11.86
- D. 0.52
Explanation
The molal freezing point depression constant for H2O, Kf , is given as 1.86 °C kg/mole. Thus a 1.00 m aqueous solution freezes at -1.86 °C instead of 0.00 °C which is the normal freezing point for water.
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Solutions are described using molarity, molality, normality, mole fraction, percentage concentration and parts per million. Coverage also includes vapour-pressure lowering, boiling-point elevation, freezing-point depression and osmotic pressure, then distinguishes true solutions, colloids and suspensions by particle size, stability, light scattering and settling.
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