1.)Equal masses of water and ethylene glycol (C2H6O2) are mixed. At what temperature will the mixture freeze? The molal freezing point constant for water is 1.86 ºC/m.
2.)The vapor pressure of a liquid depends on?
3.)How many atoms are in a body centered cubic lattice?
1) The molal freezing point of water = 1.86
Let mass of each is y grams
so depression in freezing point = Kf X molality of water
molality = mass of glycol / molar mass of glycol X mass of water
molality = y / 62 X y
molality = 1 / 62 = 0.0161 molal
So freezing point depression = 1.86 X 0.0161 = 0.030C
So the water will freeze at -0.030C
2) the vapour pressure of liquids depends only upon the temperature.
3) There are eight atoms at each corner of the cube in body centered cubic lattice and one atom at the centre of body.
Each atom at corner will contribute 1/8th to the cube so total contribution of atoms at corners = 1/8 X 8 =1
Atom in centre will contribute to the cube = 1
so total atoms in BCC = 2
1.)Equal masses of water and ethylene glycol (C2H6O2) are mixed. At what temperature will the mixture...
#5 Ethylene glycol (C2H6O2) is used as an antifreeze. How many grams of ethylene glycol must be added to 1.0 L of water to reduce the freezing point of the glycol-water mixture to -10.0 degrees C? The freezing point depression constant of water is 1.86 (deg/molal).
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A solution of ethylene glycol in water at 20 degrees celsius has a mass percent of 9.78% of ethylene glycol with a density of 1.0108 g/mL. The freezing point depression constant for water (solvent for all solutions) is Kf=-1.86 percent celsius kg/mol and the boiling point elevation constant is Kb=0.512 degrees celsius kg/mol. The density of neat water at 20.0 degrees celsius is 0.9982 g/mL. Answer the following: 1. What is the molarity of the solution? 2. What is the...
A solution of ethylene glycol in water at 20.0°C has a mass percent of 8.25% of ethylene glycol with a density of 1.0087 g/mL. The freezing point depression constant for water (which you can assume is the solvent for all solutions) is K1.86°C kg/mol and the boiling point elevation constant is Kb the following: 0.512°C kg/mol. The density of neat water at 20.0°C is 0.9982 g/ml. Answer 1. What is the molarity of the solution? 2. What is the molality...