CHM 151 EXAM #2 QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
A soluble molecular compound has the ability to conduct electricity: True or False? - Answers False
Which of the following is (are) example(s) of a weak electrolyte?
a. HCl
b. NH3
c. KOH
d. HCN
e. b and c
f. b and d - Answers f. b and d
A reaction that takes place in an aqueous solution and results in the production of a solid substance is
an example of a ___ reaction. - Answers precipitation
When AgNO3 reacts with HCl the products are:
a. H2 (g)
b. nitric acid
c. AgCl (s)
d. AgCl (aq)
e. b and c
f. b and d - Answers e. b and c
What is the net ionic equation when HC2H3O2 reacts with NaOH?
a. HC2H3O2 (aq) + NaOH (aq) →C2H3O2Na (aq) + H2O (l)
b. H^+ (aq) + OH^- (aq) →H2O (l)
c. HC2H3O2 (aq) + 2OH^- (aq) → C2H3O2^- (aq) + 2H2O (l)
d. HC2H3O2 (aq) + OH^- → C2H3O2^- (aq) + H2O (l) - Answers d. HC2H3O2 (aq) + OH^- → C2H3O2^-
(aq) + H2O (l)
True or false: Ba(OH)2 is insoluble in water - Answers false
A Bronsted-Lowry acid/base reaction is best defined as:
a. combination reaction
b. redox reaction
c. loss of a proton
d. a proton transfer reaction - Answers d. a proton transfer reaction
A diprotic acid has ___ acidic protons.
a. many
b. 2
c. 3
d. 4 - Answers b. 2
The gas formed when Na2S reacts with H2SO4 is:
a. SO3
b. SO2
c. H2S
d. Cl2 - Answers c. H2S
What are the oxidation states of each element in KClO3?
a. K=+1, Cl=+5, O=-2
b. K=-1, Cl=+5, O=-2
c. K=+1, Cl=-5, O=-2
d. K=+1, Cl=+5, O=2 - Answers a. K=+1, Cl=+5, O=-2
CuCl2 (aq) + Mg(s) → MgCl2 (aq) + Cu(s) is an example of a:
a. combination reaction
b. combustion reaction
c. displacement reaction
d. redox reaction
e. b and d
f. c and d - Answers f. c and d
In the preceding reaction ___ is the oxidizing agent and ___ is the reducing agent. - Answers Cu, Mg
The molarity of a solution of HBr if 10.23 g is dissolved in water to a final volume of 500.00 mL is -
Answers 0.253 M of HBr
What volume of a 0.250 M solution of H3PO4 is required to prepare 100.00 mL of a 0.100 M H3PO4?
A soluble molecular compound has the ability to conduct electricity: True or False? - Answers False
Which of the following is (are) example(s) of a weak electrolyte?
a. HCl
b. NH3
c. KOH
d. HCN
e. b and c
f. b and d - Answers f. b and d
A reaction that takes place in an aqueous solution and results in the production of a solid substance is
an example of a ___ reaction. - Answers precipitation
When AgNO3 reacts with HCl the products are:
a. H2 (g)
b. nitric acid
c. AgCl (s)
d. AgCl (aq)
e. b and c
f. b and d - Answers e. b and c
What is the net ionic equation when HC2H3O2 reacts with NaOH?
a. HC2H3O2 (aq) + NaOH (aq) →C2H3O2Na (aq) + H2O (l)
b. H^+ (aq) + OH^- (aq) →H2O (l)
c. HC2H3O2 (aq) + 2OH^- (aq) → C2H3O2^- (aq) + 2H2O (l)
d. HC2H3O2 (aq) + OH^- → C2H3O2^- (aq) + H2O (l) - Answers d. HC2H3O2 (aq) + OH^- → C2H3O2^-
(aq) + H2O (l)
True or false: Ba(OH)2 is insoluble in water - Answers false
A Bronsted-Lowry acid/base reaction is best defined as:
a. combination reaction
b. redox reaction
c. loss of a proton
d. a proton transfer reaction - Answers d. a proton transfer reaction
A diprotic acid has ___ acidic protons.
a. many
b. 2
c. 3
d. 4 - Answers b. 2
The gas formed when Na2S reacts with H2SO4 is:
a. SO3
b. SO2
c. H2S
d. Cl2 - Answers c. H2S
What are the oxidation states of each element in KClO3?
a. K=+1, Cl=+5, O=-2
b. K=-1, Cl=+5, O=-2
c. K=+1, Cl=-5, O=-2
d. K=+1, Cl=+5, O=2 - Answers a. K=+1, Cl=+5, O=-2
CuCl2 (aq) + Mg(s) → MgCl2 (aq) + Cu(s) is an example of a:
a. combination reaction
b. combustion reaction
c. displacement reaction
d. redox reaction
e. b and d
f. c and d - Answers f. c and d
In the preceding reaction ___ is the oxidizing agent and ___ is the reducing agent. - Answers Cu, Mg
The molarity of a solution of HBr if 10.23 g is dissolved in water to a final volume of 500.00 mL is -
Answers 0.253 M of HBr
What volume of a 0.250 M solution of H3PO4 is required to prepare 100.00 mL of a 0.100 M H3PO4?
