Interpretation:
The freezing point and the boiling point of the solution are to be calculated with the help of mass of ethylene glycol and mass of water.
Concept introduction:
Molality is defined as the total number of moles present in one kilogram of the solvent.
The mass of the solvent should be in kilograms
The temperature at which the change from liquid state to solid state occurs is called freezing point.
The freezing point depression is as follows:
Here,
For water:
The actual freezing point is the difference between freezing point of pure solvent and freezing point depression.
The temperature at which vapor pressure of the liquid becomes equal to the atmospheric pressure is known as boiling point.
The boiling point elevation is as follows:
Here,
For water:
The actual boiling point of the solution is the sum of boiling point of pure water and boiling point elevation
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Chemistry
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