End of Module 11 Quiz

Find the mole fraction of NaCl in a solution prepared by dissolving 15.0 g of NaCl in 125 g water.

Which of the following will probably not make a solution?

Find the molality of solution prepared by dissolving 0.265 mols of NaCl in 135 g of water.

-Find the mole fraction of KBr in 0.25 m KBr solution.

Which of the following does not affect the solubility of gases in solution?

Usually with increase in temperature, solubility of solids

At 25 0 C, the concentration of gas in water was found to be 0.0029 mols/L when the
partial pressure of gas was 740. torr. Find the Henry’s law constant for the gas at 25 0 C.

At 35 0 C, the concentration of oxygen in water was found to be 0.0015 mols/L when the
partial pressure of oxygen was 175 kPa. find the solubility of oxygen if the partial
pressure of oxygen was increased to 340. kPa.

Find the vapor pressure of the solution at 25 0 C prepared by dissolving 15.5 g of KCl
(molar mass 74.55 g/mol) in 165 g of water. Given that the vapor pressure of pure water
at 25 0 C is 23.8 torr.

Find the freezing point of solution prepared by dissolving 27.5 g of Glucose, a non-electrolyte
(molar mass 180 g/mol) in 155 g of water. Freezing point depression constant Kf for water is
1.86 0 C.Kg/mol.

Find the boiling point of the solution prepared by dissolving 15.5 g of CaCl 2 (molar mass
110.98 g/mol) in 165 g of water. Given that Boiling point elevation constant Kb for water is
0.51 0 C.Kg/mol.

An ideal solution is

Find the osmotic pressure of the solution prepared by dissolving 2.7 g of LiCl in 155 ml of
solution at 25 0 C.

Which of the following will show Brownian motion?

Scattering of light by a colloidal solution is called

Two solutions of similar molality were prepared by dissolving an electrolyte and a nonelectrolyte
in water. Which of the following is true about these solutions?

Which of the following will have lowest freezing point?

When sodium hydroxide was dissolved in water, solution feels much hotter than the water that
was originally in beaker. Which of the following is true about this observation?

Find the molality of NaOH solution which is labeled as 2.5% NaOH by Mass.

Which of the following is nonelectrolyte?

Which of the following is an example of solution? 

A solution was prepared by dissolving 25 g of sugar in 150 g of water. What is solute in this
solution

Find the molarity of solution prepared by dissolving 25.0 g of NaCl in 155 ml solution.

Find m/m % concentration of the solution prepared by dissolving 25.0 g of NaCl in 155 g water.

How many grams of NaOH are needed to prepare 155 ml of 1.5 M solution?