Q: Which equation correctly represents Raoult’s Law for vapor pressure lowering?

$P_{\text{soln}} = X_{\text{solvent}} \times P_{\text{solvent}}$

Question 1

Which type of intermolecular force is the major force in ionic compounds dissolved in polar solvents?

Accepted Answer

Ion-dipole

Question 2

A compound contains hydrogen directly bonded to fluorine. Which intermolecular force is most important in this compound?

Accepted Answer

Hydrogen bonding

Question 3

Which of the following best describes the polarity required for dipole-dipole forces?

Accepted Answer

Polar covalent compounds

Question 4

Based on the solubility table, what is the most likely solubility value of F$_2$ in water at 25$^	ext{o}$C?

Accepted Answer

$0.01$

Question 5

A solution is prepared by dissolving 80 g of a substance in 100 mL of water at 75$^	ext{o}$C, then cooled to 20$^	ext{o}$C without any solid forming. The solubility at 20$^	ext{o}$C is 56 g per 100 mL. What type of solution is present at 20$^	ext{o}$C?

Accepted Answer

Supersaturated

Question 6

Which colligative property is defined as the pressure exerted by a gas at the surface of a liquid at equilibrium?

Accepted Answer

Vapor pressure

Question 7

What is the direction of water flow between two solutions separated by a semipermeable membrane, where Solution A has a lower solute concentration than Solution B?

Accepted Answer

Water will flow from Solution A to Solution B due to higher osmotic pressure on Solution B.

Question 8

Which solution will increase in volume when a semipermeable membrane is placed between Solution A (6.78% NaCl) and Solution B (12.7% NaCl)?

Accepted Answer

Solution A

Question 9

A red blood cell placed in pure water will swell because:

Accepted Answer

The osmotic pressure is greater in the cell than in the water.

Question 10

Which environment causes hemolysis in red blood cells?

Accepted Answer

Hypotonic

Question 11

Which equation correctly represents Raoult’s Law for vapor pressure lowering?

Accepted Answer

$P_{	ext{soln}} = X_{	ext{solvent}} 	imes P_{	ext{solvent}}$

Question 12

Which of the following is true regarding the solubility of gases in water as temperature increases?

Accepted Answer

Solubility of gases decreases

Question 13

Which type of solution contains more dissolved solute than the equilibrium concentration?

Accepted Answer

Supersaturated

Question 14

Which colligative property is responsible for the net movement of water across a semipermeable membrane?

Accepted Answer

Osmotic pressure

Question 15

Which type of intermolecular force is present in all covalent compounds regardless of polarity?

Accepted Answer

London dispersion (van der Waals)

Question 16

In a hypertonic environment, what happens to a red blood cell?

Accepted Answer

It shrivels and dehydrates

Question 17

Which property is directly proportional to the partial pressure of a gas over a liquid according to Henry’s Law?

Accepted Answer

Solubility

Question 18

Which equation represents the freezing point depression for a solution?

Accepted Answer

$\Delta T_f = i \cdot k_f \cdot m$

Question 19

Which equation represents the boiling point elevation for a solution?

Accepted Answer

$\Delta T_b = i \cdot k_b \cdot m$

Question 20

Which equation represents the osmotic pressure of a solution?

Accepted Answer

$\Pi = i \cdot M \cdot R \cdot T$

Ch.13 - Solutions: Properties, Concentrations, and Colligative Effects

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