Question 1

Which of the following best describes an aqueous solution?

Accepted Answer

A solution in which water is the solvent.

Question 2

A student prepares a solution by dissolving 25.5 g of KBr in enough water to make 1.75 L of solution. What is the molarity of the solution? (Molar mass of KBr = 119.0 g/mol)

Accepted Answer

$$0.122\ \mathrm{M}$$

Question 3

Which of the following statements about solute and solvent is correct?

Accepted Answer

The solvent is the component present in the highest proportion.

Question 4

Which of the following solutions will conduct electricity?

Accepted Answer

A solution of NaCl in water.

Question 5

What is the correct formula to calculate the molarity of a solution?

Accepted Answer

$$M = \frac{n}{V}$$

Question 6

How many grams of KBr are needed to prepare 250.0 mL of a 1.50 M KBr solution? (Molar mass of KBr = 119.0 g/mol)

Accepted Answer

$$44.6\ \mathrm{g}$$

Question 7

A chemist wants to prepare 3.00 L of 0.500 M CaCl$$_2$$ from a 10.0 M stock solution. What volume of the stock solution is required?

Accepted Answer

$$0.150\ \mathrm{L}$$

Question 8

Which of the following best explains why NaCl conducts electricity when dissolved in water, but sugar does not?

Accepted Answer

NaCl dissociates into ions, while sugar does not.

Question 9

Which of the following is a strong electrolyte?

Accepted Answer

NaCl

Question 10

What volume (in mL) should you dilute 100.0 mL of a 5.00 M CaCl$$_2$$ solution to obtain a 0.750 M CaCl$$_2$$ solution?

Accepted Answer

$$667\ \mathrm{mL}$$

Question 11

Which of the following compounds is insoluble in water?

Accepted Answer

AgCl

Question 12

Which of the following best describes a concentrated solution?

Accepted Answer

A solution with a large amount of solute compared to solvent.

Question 13

Which of the following is the correct dissociation equation for CaCl$$_2 in $$water?

Accepted Answer

$$\mathrm{CaCl}_2 (aq) \rightarrow \mathrm{Ca}^{2+} (aq) + 2\ \mathrm{Cl}^{-} (aq)$$

Question 14

Which of the following is a nonelectrolyte when dissolved in water?

Accepted Answer

C$$_6H$_{12}O$_6$$

Question 15

Which of the following best describes the process of dissociation?

Accepted Answer

The separation of anions and cations when an ionic compound dissolves in water.

Question 16

Which of the following compounds is generally soluble in water according to the solubility rules?

Accepted Answer

KOH

Question 17

A solution is prepared by mixing 40% ethanol, 40% methanol, and 20% butanol by mass. Which component(s) act as the solvent?

Accepted Answer

Ethanol and methanol

Question 18

Which of the following best describes a weak electrolyte?

Accepted Answer

A substance that partially ionizes in water.

Question 19

Which of the following is the correct net ionic equation for the reaction between Na$$_2CO$_3$$ and HNO$$_3 in $$aqueous solution?

Accepted Answer

$$\mathrm{CO}_3$$^{2-}$$ (aq) + 2\ \mathrm{H}^+ (aq) \rightarrow \mathrm{CO}_2 (g) + \mathrm{H}_2\mathrm{O} (l)$$

Introduction to Solutions and Aqueous Reactions: Study Guide

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