Question

Calculate the mass of propylene glycol (C3H8O2) that must be
added to 0.330 kg of water to reduce the vapor pressure by 2.88
torr at 40 ∘C (*P*H2O at 40 ∘C=55.3torr).

Answer #1

Calculate the vapor pressure at 50°C of a coolant solution that
is 57.0:43.0 ethylene glycol-to-water by volume. At 50.0°C, the
density of water is 0.9880 g/mL, and its vapor pressure is 92 torr.
The vapor pressure of ethylene glycol is less than 1 torr at
50.0°C. Answer in torr

How many grams of ethylene glycol (C2H6O2) must be added to 1.10
kg of water to produce a solution that freezes at -5.24 ∘C?

Calculate the vapor pressure at 50 Celsius of a coolant solution
that is 55.0:45.0 ethylene glycol to water by volume. At 50.0
Celsius, the density of water is .9880 g/mL, and it’s vapor
pressure is 92 torr. The vapor pressure of ethylene glycol is less
than 1 torr at 50.0 celsius

What is the vapor pressure of an aqueous solution containing 10
%(by weight) ethylene glycol (62 g/mol) at 25 C. PH2O= 24.3 torr at
25 C.

Some ethylene glycol, HOCH2CH2OH , is added to your car’s
cooling system along with 5.0 kg of water. If the freezing point of
the water–glycol solution is −13.0 °C, what mass of HOCH2CH2OH must
have been added? (Kfp for H2O is −1.86 °C/m.)

Suppose 725.4 g of ethylene glycol, HOCH2CH2OH, is dissolved in
2.250 kg of water. What is the vapor pressure of the water over the
solution at 90*C? The vapor pressure of pure water at 90*C is 525.8
mmHg. Assume ideal behavior for the solution.

Determine the vapor pressure of an aqueous ethylene glycol (C2H6O2)
solution that is 26.8% C2H6O2 by mass. The vapor pressure of pure
water at 25 degrees Celsius is 23.8 torr.

How many grams of KCl must be added to 250 g of water to lower
the vapor pressure by 1.30 mmHg at 40 ∘C assuming complete
dissociation? The vapor pressure of water at 40 ∘C is 55.3 mmHg

1. Calculate the vapor pressure of water over a solution of
ethylene glycol, C2H6O2, at 22C which has a mole fraction of
ethylene glycol of .288. The vapor pressure of pure water at 22C is
19.83mm-Hg.
2. What is the final potassium ion molarity in a solution made
by mixing 300mL of 1M potassium nitrate and 700mL of 2M potassium
phosphate (k3PO4)?

the vapor pressure of water at 25°c is 23.8 torr.
determine the mass of glucose(molar mass =180g/mol) needed to add
to 500g water to change the vapor pressure to 23.1 torr.

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