Exam 13: Properties of Solutions

The Henry's law constant for helium gas in water at 30 °C is 3.70 × 10^{- 4} M/atm. When the partial pressure of helium above a sample of water is 0.650 atm, the concentration of helium in the water is M

The phenomenon used to differentiate colloids and true solutions is called the effect.

The freezing point of ethanol (C₂H₅OH) is - 114.6 °C. The molal freezing point depression constant for ethanol is 2.00 °C/m. What is the freezing point (°C) of a solution prepared by dissolving 50.0 g of glycerin (C₃H₈O₃, a nonelectrolyte) in 200 g of ethanol?

Which one of the following substances is more likely to dissolve in benzene (C₆H₆)?

The principal reason for the extremely low solubility of NaCl in benzene (C₆H₆) is the _ .

Calculate the freezing point of a solution containing 40.0 grams of KCl and 4400.0 grams of water. The molal- freezing- point- depression constant (K_f) for water is 1.86 ° C/m.

Pressure has an appreciable effect on the solubility of in liquids.

Of the following, a 0.1 M aqueous solution of will have the lowest freezing point.

The concentration of KCl in a solution prepared by adding 0.0660 mol of KCl to 1.00 mol of water is % by mass.

When solutions of strong electrolytes in water are formed, the ions are surrounded by water molecules. These interactions are best described as a case of _.

The concentration of chloride ion in a solution that contains 35.0 ppm chloride is % by mass.

The mole fraction of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 16 g of urea in 39 g of H₂O is _ .

A solution is prepared by dissolving 6.00 g of an unknown nonelectrolyte in enough water to make 1)00 L of solution. The osmotic pressure of this solution is 0.750 atm at 25.0 °C. What is the molecular weight (g/mol) of the unknown solute?

The concentration of HCl in a solution that is prepared by dissolving 5.5 g of HCl in 200 g of C₂H₆O is _ molal.

A solution contains 11% by mass of sodium chloride. This means that .

The vapor pressure of pure water at 25 °C is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by dissolving 18.0 g of glucose (anonelectrolyte, MW = 180.0 g/mol) in 95.0 g of water?

A solution is prepared by dissolving 7.00 g of glycerin (C₃H₈O₃) in 201 g of ethanol (C₂H₅OH). The freezing point of the solution is °C. The freezing point of pure ethanol is - 114.6 °C at 1 atm. The molal- freezing- point- depression constant (K_f) for ethanol is 1.99 ° C/m. The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively.

When argon is placed in a container of neon, the argon spontaneously disperses throughout the neon because .

A 1.35 m aqueous solution of compound X had a boiling point of 101.4°C. Which one of the following could be compound X? The boiling point elevation constant for water is 0.52°C/m.

Which of the following substances is more likely to dissolve in CH₃OH?