Chapter 4 4 128 What Compound Formed Precipitate When Solutions

Chapter 04 – Reactions in Aqueous Solutions

125. Select True or False: CH3COOH is a weak electrolyte.

126. Select True or False: NH3 is a weak electrolyte.

127. Select True or False: NH4Cl is a nonelectrolyte.

Chapter 04 – Reactions in Aqueous Solutions

128. What compound is formed, as a precipitate, when solutions of Na3PO4(aq),

Ca(NO3)2(aq), and NH4ClO3(aq) are mixed?

129. What compound is formed, as a precipitate, when solutions of Hg2(ClO4)2(aq),

(NH4)2SO4(aq), and Rb2SO4(aq) are mixed?

Chapter 04 – Reactions in Aqueous Solutions

130. What compound is formed, as a precipitate, when solutions of NaOH(aq), Ca(ClO3)2(aq),

and Ba(OH)2(aq) are mixed?

131. Select True or False: HNO3 is an example of a monoproticacid.

132. Select True or False: H2CO3 is an example of a diproticacid.

Chapter 04 – Reactions in Aqueous Solutions

133. Of the following, which is NOT an example of a strong acid?

134. Select True or False: Na3PO4 is an example of a triproticacid.

Chapter 04 – Reactions in Aqueous Solutions

135. Which of the following, if any, is the correctly balanced net ionic equation for reaction

that occurs when aqueous iron(III) sulfate is added to aqueous sodium sulfide to produce solid

iron(III) sulfide and aqueous sodium sulfate.

Chapter 04 – Reactions in Aqueous Solutions

136. In this compound what is the correct representation for the oxidation number of each of

the elements in Cs2Cr2O7?

137.

Select True or False: Al is being oxidized in the following reaction.

4Al + 3O2 → 2Al2O3

Chapter 04 – Reactions in Aqueous Solutions

138.

Select True or False: Oxygen is the element being reduced in the following reaction.

4Al + 3O2 → 2Al2O3

139.

Select True or False: Al is the oxidizing agent in the following reaction.

4Al + 3O2 → 2Al2O3

140.

Select True or False: Al is the reducing agent in the following reaction.

4Al + 3O2 → 2Al2O3

Chapter 04 – Reactions in Aqueous Solutions

141.

Select True or False: K is element being oxidized in the following reaction.

2KBr + F2 → Br2 + 2KF

142.

Select True or False: Fluorine is the element being reduced in the following reaction.

2KBr + F2 → Br2 + 2KF

143.

Select True or False: Fluorine is the oxidizing agent in the following reaction.

2KBr + F2 → Br2 + 2KF

Chapter 04 – Reactions in Aqueous Solutions

144.

Select True or False: Fluorine is the reducing agent in the following reaction.

2KBr + F2 → Br2 + 2KF

145. Which represents the oxidation number of each of the elements in BaNaPO4?

Chapter 04 – Reactions in Aqueous Solutions

146. Determine the oxidation number of each of the elements in NaAl(OH)4?

Bloom’s Level: 4. Analyze

Difficulty: Easy

Gradable: automatic

Section: 04.04

Subtopic: Oxidation-Reduction (REDOX) Reactions (Definitions and Balancing)

Topic: Electrochemistry

147. Select True or False: Thorium +4 is reduced in this process. (Thorium metal is prepared

by reacting thorium oxide with calcium as shown below.)

ThO2 + 2Ca → Th + 2CaO

148. Select True or False: Th+4 is the reducing agent in this process.

(Thorium metal is prepared by reacting thorium oxide with calcium as depicted below.)

ThO2 + 2Ca → Th + 2CaO

Chapter 04 – Reactions in Aqueous Solutions

149. Select True or False: Ca is oxidized in this process. (Thorium metal is prepared by

reacting thorium oxide with calcium as shown below.)

ThO2 + 2Ca → Th + 2CaO

150. Select True or False: Ca is the oxidizing agent in this process. (Thorium metal is

prepared by reacting thorium oxide with calcium as shown below.)

151. Select True or False: H2SO4 is reduced in this process. (Batteries in our cars generate

electricity by the following chemical reaction.)

Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O

Chapter 04 – Reactions in Aqueous Solutions

152. Select True or False: Pb is the reducing agent in this process. (Batteries in our cars

generate electricity by the following chemical reaction.)

153. Select True or False: PbO2 is oxidized in this process. (Batteries in our cars generate

electricity by the following chemical reaction.)

Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O

154. Select True or False: Pb is the oxidizing agent in this process. (Batteries in our cars

generate electricity by the following chemical reaction.)

Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O

Chapter 04 – Reactions in Aqueous Solutions

155. Decide which category to place the following reaction: acid-base neutralization,

precipitation, combination, decomposition, combustion, displacement, or disproportionation

reaction.

CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)

Chapter 04 – Reactions in Aqueous Solutions

156.

Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion,

displacement, or disproportionation reaction.

Ba(C2H3O2)2(aq) + Na2CO3(aq) → BaCO3(s) + 2 NaC2H3O2(aq)

157.

Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion,

displacement, or disproportionation reaction.

2KClO3(s) → 2KCl(s) + 3O2(g)

Chapter 04 – Reactions in Aqueous Solutions

158.

Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion,

displacement, or disproportionation reaction.

H2SO4(aq) + 2 KOH(aq) → 2 H2O(l) + K2SO4(aq)

159. Starting with solid KCl and water, how many grams of KCl are needed to prepare 3.00

liters of a 2.00 M KCl solution?

Chapter 04 – Reactions in Aqueous Solutions

160. What is the molarity of a solution that contains 5.0 moles of solute in 2.00 liters of

solution?

161. The solubility of Ba(NO3)2 is 130.5 grams per liter at 0C. How many moles of dissolved

salt are present in 4.0 liters of a saturated solution of Ba(NO3)2 at 0ºC?