Question 1

Which of the following best describes the role of water as a solvent in the formation of a solution with NaCl?

Accepted Answer

Water's polarity allows it to surround and separate Na+ and Cl- ions, dissolving NaCl.

Question 2

A solution is prepared by dissolving 4.0 g of NaCl in enough water to make 100 mL of solution. What is the mass/volume percent ($$\frac{	ext{mass solute}}{	ext{volume solution}} 	imes 100) of $$NaCl in the solution?

Accepted Answer

$$4.0\%$$

Question 3

Which of the following substances would NOT be expected to dissolve in water?

Accepted Answer

CCl$$_4$$

Question 4

A nurse needs to prepare 250 mL of a 0.90% (m/v) saline solution. How many grams of NaCl are required?

Accepted Answer

$$2.25 g$$

Question 5

Which statement correctly distinguishes between a saturated and an unsaturated solution?

Accepted Answer

A saturated solution contains the maximum amount of solute that can dissolve at a given temperature.

Question 6

Which of the following is an example of a colloid?

Accepted Answer

Milk

Question 7

A 0.50 M NaOH solution is diluted to 1.50 L. If the final concentration is 0.10 M, what was the initial volume of the NaOH solution used?

Accepted Answer

$$0.30 L$$

Question 8

Which of the following best describes an electrolyte?

Accepted Answer

A substance that forms ions in solution and conducts electricity.

Question 9

A solution contains 5.0 g of glucose (C$$_6H$_{12}O$_6) in 100 mL of $$water. What is the mass/volume percent of glucose in the solution?

Accepted Answer

$$5.0\%$$

Question 10

Which of the following would increase the solubility of a gas in water?

Accepted Answer

Decreasing the temperature and increasing the pressure

Question 11

A solution is made by mixing 40.0 mL of 0.50 M HCl with enough water to make 100.0 mL of solution. What is the final concentration of HCl?

Accepted Answer

$$0.20 M$$

Question 12

Which of the following is NOT a characteristic of a solution?

Accepted Answer

It can be separated by filtration.

Question 13

A patient receives an IV solution containing 0.9% NaCl. What type of solution is this?

Accepted Answer

Isotonic

Question 14

Which formula is used to calculate the final concentration after dilution?

Accepted Answer

$$C_1V_1 = C_2V_2$$

Question 15

Which of the following is a nonelectrolyte?

Accepted Answer

C$$_6H$_{12}O$_6 ($$glucose)

Question 16

A solution is prepared by dissolving 10.0 g of KCl in 200 mL of water. What is the mass/volume percent of KCl?

Accepted Answer

$$5.0\%$$

Question 17

Which of the following statements about solubility is correct?

Accepted Answer

Solubility of solids in liquids generally increases with increasing temperature.

Question 18

A solution contains 0.25 mol of NaCl in 500 mL of water. What is the molarity of the solution?

Accepted Answer

$$0.50 M$$

Question 19

Which of the following best explains why oil does not dissolve in water?

Accepted Answer

Oil is nonpolar and water is polar, so there is little attraction between their molecules.

Question 20

A solution is made by mixing 25.0 mL of 2.0 M H$$_2SO$_4$$ with enough water to make 100.0 mL of solution. What is the final concentration?

Accepted Answer

$$0.50 M$$

Chapter 9 Study Guide: Solutions (GOB Chemistry)

Guida di studio - Domande di pratica

Study guide - Flashcard