How do all of the parts in the water cycle together?
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Ответ:
Ответ:
The freezing point of solution is -0.974°C
Explanation:
To calculate the concentration of solute, we use the equation for osmotic pressure, which is:where,
= osmotic pressure of the solution = 12.1 atm
i = Van't hoff factor = 1 (for non-electrolytes)
M = molarity of solute = ?
R = Gas constant =
T = temperature of the solution = 298 K
Putting values in above equation, we get:
This means that 0.495 moles of glucose is present in 1 L or 1000 mL of solution
To calculate the mass of solution, we use the equation:Density of solution = 1.034 g/mL
Volume of solution = 1000 mL
Putting values in above equation, we get:
To calculate the number of moles, we use the equation:Moles of glucose = 0.495 moles
Molar mass of glucose = 180.16 g/mol
Putting values in above equation, we get:
Depression in freezing point is defined as the difference in the freezing point of pure solution and freezing point of solution.
The equation used to calculate depression in freezing point follows:To calculate the depression in freezing point, we use the equation:
Or,
where,
Freezing point of pure solution = 0°C
i = Vant hoff factor = 1 (For non-electrolytes)
= molal freezing point elevation constant = 1.86°C/m
= Given mass of solute (glucose) = 89.18 g
= Molar mass of solute (glucose) = 180.16 g/mol
= Mass of solvent (water) = [1034 - 89.18] g = 944.82 g
Putting values in above equation, we get:
Hence, the freezing point of solution is -0.974°C