Question 1

Express the following concentration of solution in terms of molarity: 3.00 L of solution contains 1.75 mol of solute.

Accepted Answer

A) 5.25 M 
B) 0.583 M 
C) 1.71 M 
D) too little information to know 
A) 5.25 M 
B) 0.583 M 
C) 1.71 M 
D) too little information to know

Question 2

A 100 mL sample of a saturated CaSO4 solution is evaporated to dryness. The water solvent all evaporates and leaves behind a solid residue of CaSO4 that weighs 0.23 g. The CaSO4 would be classified as

Accepted Answer

A) insoluble in water. 
B) slightly soluble in water. 
C) soluble in water. 
D) very soluble in water. 
A) insoluble in water. 
B) slightly soluble in water. 
C) soluble in water. 
D) very soluble in water.

Question 3

When solid NaOH is dissolved in water, the solution becomes hot. The solution process is

Accepted Answer

A) exothermic. 
B) endothermic. 
C) neither exothermic nor endothermic. 
D) Can't be classified. 
A) exothermic. 
B) endothermic. 
C) neither exothermic nor endothermic. 
D) Can't be classified.

Question 4

​ How does the solubility of a gas change with change in pressure at a constant temperature?

Accepted Answer

A) The solubility of the gas doubles if the gas pressure is doubled. 
B) The solubility of the gas is halved if the gas pressure is doubled. 
C) The solubility of the gas increases threefold if the gas pressure is doubled. 
D) The solubility of the gas doubles if the pressure is halved. 
A) The solubility of the gas doubles if the gas pressure is doubled. 
B) The solubility of the gas is halved if the gas pressure is doubled. 
C) The solubility of the gas increases threefold if the gas pressure is doubled. 
D) The solubility of the gas doubles if the pressure is halved.

Question 5

Changes in boiling point, freezing point, and vapor pressure are

Accepted Answer

A) the same for 2 M NaCl as they are for 2 M CaCl2. 
B) the same for 50 mL of 2 M NaCl as they are for 250 mL of 1 M NaCl. 
C) the same for 75 mL of 2 M NaCl as they are for 50 mL of 2 M NaOH. 
D) the same at 1 atm as at 1.55 atm. 
A) the same for 2 M NaCl as they are for 2 M CaCl2. 
B) the same for 50 mL of 2 M NaCl as they are for 250 mL of 1 M NaCl. 
C) the same for 75 mL of 2 M NaCl as they are for 50 mL of 2 M NaOH. 
D) the same at 1 atm as at 1.55 atm.

Question 6

A 0.9% NaCl (w\w)solution in water is

Accepted Answer

A) produced by mixing 0.9 moles of NaCl in a 100 moles of water. 
B) produced and has the same final volume as a 0.9% solution in ethyl alcohol. 
C) a solution that boils at or above 100 ° C. 
D) All of these responses are correct. 
A) produced by mixing 0.9 moles of NaCl in a 100 moles of water. 
B) produced and has the same final volume as a 0.9% solution in ethyl alcohol. 
C) a solution that boils at or above 100 ° C. 
D) All of these responses are correct.

Question 7

What is the underlying process involved in dialysis?

Accepted Answer

A) mixtures are homogenous. 
B) osmosis is due to a difference in solution concentrations. 
C) pressure is applied to the blood squeezing out the impurities. 
D) an electrical potential separates the blood from the impurities. 
A) mixtures are homogenous. 
B) osmosis is due to a difference in solution concentrations. 
C) pressure is applied to the blood squeezing out the impurities. 
D) an electrical potential separates the blood from the impurities.

Question 8

A solution is made by dissolving a small amount of salt in a beaker of water. The water is referred to as the

Accepted Answer

A) precipitate. 
B) filtrate. 
C) solvent. 
D) solute. 
A) precipitate. 
B) filtrate. 
C) solvent. 
D) solute.

Question 9

Identify a true statement of an immiscible solute.

Accepted Answer

A) It is a substance present in a solution in the largest amount. 
B) It is a substance that does not dissolve to a significant extent in a solvent. 
C) It is a substance that dissolves to a significant extent in a solvent. 
D) It is a liquid solute that does not dissolve in a liquid solvent. 
A) It is a substance present in a solution in the largest amount. 
B) It is a substance that does not dissolve to a significant extent in a solvent. 
C) It is a substance that dissolves to a significant extent in a solvent. 
D) It is a liquid solute that does not dissolve in a liquid solvent.

Question 10

Which of the following pairs correctly represent similar functions for a solution component and a colloid component?

Accepted Answer

A) solvent\dispersed phase 
B) solute\dispersion medium 
C) solvent\dispersion medium 
D) more than one response is correct 
A) solvent\dispersed phase 
B) solute\dispersion medium 
C) solvent\dispersion medium 
D) more than one response is correct

Question 11

A solution is made by combining 4.00 g of sugar and 100 mL of water (density = 1.00 g\mL). What is the concentration in % w\w?

Accepted Answer

A) 26.0 
B) 4.00 
C) 0.0400 
D) 3.85 
A) 26.0 
B) 4.00 
C) 0.0400 
D) 3.85

Question 12

What is the molarity of a solution containing 0.325 moles of solute in 250 mL of solution?

Accepted Answer

A) 1.30 × 10 − 3 
B) 1.30 
C) 0.769 
D) 8.13 × 10 − 2 
A) 1.30 × 10 − 3 
B) 1.30 
C) 0.769 
D) 8.13 × 10 − 2

Question 13

Suppose a solution contains 200 g water and 15 g glucose. Which of the following statements is true?

Accepted Answer

A) Glucose would be classified as the solvent. 
B) Water would be classified as the solvent. 
C) Either component could be classified as the solvent. 
D) More than one response is correct. 
A) Glucose would be classified as the solvent. 
B) Water would be classified as the solvent. 
C) Either component could be classified as the solvent. 
D) More than one response is correct.

Question 14

When will carbon dioxide in a carbonated soft drink dissolve best?

Accepted Answer

A) after shaking the container 
B) after heating the container 
C) after cooling the container 
D) after releasing the pressure 
A) after shaking the container 
B) after heating the container 
C) after cooling the container 
D) after releasing the pressure

Question 15

The rate of osmosis

Accepted Answer

A) can be increased by having larger pores in the membrane. 
B) can be increased by removing the membrane. 
C) can be increased by an increase in the atmospheric pressure. 
D) cannot be increased by any of the responses. 
A) can be increased by having larger pores in the membrane. 
B) can be increased by removing the membrane. 
C) can be increased by an increase in the atmospheric pressure. 
D) cannot be increased by any of the responses.

Question 16

Colloids are considered to be homogenous mixtures.

Accepted Answer

A) True 
 B)False

Question 17

You have a patient who is suffering from the "bends".  What gas is in excess in the blood?

Accepted Answer

A) nitrogen 
B) oxygen 
C) helium 
D) all of these 
A) nitrogen 
B) oxygen 
C) helium 
D) all of these

Question 18

A solution is prepared at 75 °C by dissolving 50.0 g of A  in 100 g of water.  Which of the following correctly classifies this solution based on the solubility chart for A given below?

Accepted Answer

A) saturated 
B) unsaturated 
C) supersaturated 
D) immiscible 
A) saturated 
B) unsaturated 
C) supersaturated 
D) immiscible

Exam 7: Solutions and Colloids

Express the following concentration of solution in terms of molarity: 3.00 L of solution contains 1.75 mol of solute.

A 100 mL sample of a saturated CaSO4 solution is evaporated to dryness. The water solvent all evaporates and leaves behind a solid residue of CaSO4 that weighs 0.23 g. The CaSO4 would be classified as

When solid NaOH is dissolved in water, the solution becomes hot. The solution process is

​ How does the solubility of a gas change with change in pressure at a constant temperature?

Changes in boiling point, freezing point, and vapor pressure are

A 0.9% NaCl (w\w)solution in water is

What is the underlying process involved in dialysis?

A solution is made by dissolving a small amount of salt in a beaker of water. The water is referred to as the

Identify a true statement of an immiscible solute.

Which of the following pairs correctly represent similar functions for a solution component and a colloid component?

A solution is made by combining 4.00 g of sugar and 100 mL of water (density = 1.00 g\mL). What is the concentration in % w\w?

What is the molarity of a solution containing 0.325 moles of solute in 250 mL of solution?

Suppose a solution contains 200 g water and 15 g glucose. Which of the following statements is true?

When will carbon dioxide in a carbonated soft drink dissolve best?

The rate of osmosis

Colloids are considered to be homogenous mixtures.

You have a patient who is suffering from the "bends". What gas is in excess in the blood?

A solution is prepared at 75 °C by dissolving 50.0 g of A in 100 g of water. Which of the following correctly classifies this solution based on the solubility chart for A given below?

Matter, Measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Reaction Rates and Equilibrium

Acids, Bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, Phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

A 100 mL sample of a saturated CaSO₄ solution is evaporated to dryness. The water solvent all evaporates and leaves behind a solid residue of CaSO₄ that weighs 0.23 g. The CaSO₄ would be classified as

How does the solubility of a gas change with change in pressure at a constant temperature?