Q: What is the net ionic equation for the reaction between aqueous solutions of Na$$_2CO$_3$$ and CaCl$$_2$$?

$$\text{Ca}^{2+}(aq) + \text{CO}_3$$^{2-}$$(aq) \rightarrow \text{CaCO}_3(s)$$

Q: Which of the following reactions is a gas-forming reaction?

$$\text{Na}_2\text{S}(aq) + \text{H}_2\text{SO}_4(aq) \rightarrow \text{Na}_2\text{SO}_4(aq) + \text{H}_2\text{S}(g)$$

Q: Which of the following is the correct balanced net ionic equation for the neutralization of HCl with NaOH?

$$\text{H}^+(aq) + \text{OH}^-(aq) \rightarrow \text{H}_2\text{O}(l)$$

Question 1

Which of the following best describes a strong electrolyte in aqueous solution?

Accepted Answer

A substance that completely dissociates into ions in water.

Question 2

Which compound will form a precipitate when mixed with an aqueous solution of BaCl$$_2$$?

Accepted Answer

K$$_2SO$_4$$

Question 3

What is the net ionic equation for the reaction between aqueous solutions of Na$$_2CO$_3$$ and CaCl$$_2$$?

Accepted Answer

$$	ext{Ca}^{2+}(aq) + 	ext{CO}_3$$^{2-}$$(aq) ightarrow 	ext{CaCO}_3(s)$$

Question 4

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

Accepted Answer

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

Question 5

A solution is prepared by dissolving 23.4 g of Na$$_2SO$_4 in $$enough water to make 125 mL of solution. What is the molarity of the solution? (Molar mass Na$$_2SO$_4 = 142.1 g/$$mol)

Accepted Answer

$$1.32\ 	ext{M}$$

Question 6

Which of the following acids is classified as a strong acid?

Accepted Answer

Hydrochloric acid, HCl

Question 7

What is the oxidation number of sulfur in SO$$_4$$^{2-}$$?

Accepted Answer

$$+6$$

Question 8

Which of the following best describes a metathesis (double displacement) reaction?

Accepted Answer

A reaction in which ions in two compounds exchange partners.

Question 9

How many moles of ions are present in 1.5 moles of HCl dissolved in water?

Accepted Answer

2.0

Question 10

Which of the following compounds is insoluble in water?

Accepted Answer

PbSO$$_4$$

Question 11

A 0.025 M solution of Ca(NO$$_3$$)$$_2$$ contains what concentration of NO$$_3^-$$ ions?

Accepted Answer

$$0.050\ 	ext{M}$$

Question 12

Which of the following reactions is a gas-forming reaction?

Accepted Answer

$$	ext{Na}_2	ext{S}(aq) + 	ext{H}_2	ext{SO}_4(aq) ightarrow 	ext{Na}_2	ext{SO}_4(aq) + 	ext{H}_2	ext{S}(g)$$

Question 13

Which of the following statements about oxidation-reduction (redox) reactions is correct?

Accepted Answer

Oxidation and reduction always occur together.

Question 14

How many milliliters of 3.0 M H$$_2SO$_4$$ are needed to make 450 mL of 0.10 M H$$_2SO$_4$$?

Accepted Answer

15 mL

Question 15

Which of the following best describes the role of a spectator ion in a chemical reaction?

Accepted Answer

It remains unchanged and does not participate in the reaction.

Question 16

A titration is performed using 45.7 mL of 0.500 M H$$_2SO$_4 to $$neutralize 20.0 mL of NaOH solution. What is the molarity of the NaOH solution?

Accepted Answer

$$2.28\ 	ext{M}$$

Question 17

Which of the following best explains why NaCl(aq) conducts electricity but C$$_6H$_{12}O$_6(aq) $$does not?

Accepted Answer

NaCl forms ions in solution, while C$$_6H$_{12}O$_6$$ does not.

Question 18

Which of the following is the correct balanced net ionic equation for the neutralization of HCl with NaOH?

Accepted Answer

$$	ext{H}^+(aq) + 	ext{OH}^-(aq) ightarrow 	ext{H}_2	ext{O}(l)$$

Chapter 4: Reactions in Aqueous Solution – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards