CHEM 151 Exam 2 with accurate detailed solutions

CHEM 151 Exam 2 with |! |! |! |! |!




accurate detailed solutions |! |!




A soluble molecular compound has the ability to conduct electricity: True or False? -
|! |! |! |! |! |! |! |! |! |! |! |! |! |!



Correct answer ✔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 - Correct answer ✔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. - Correct answer ✔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 - Correct answer ✔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) - Correct answer ✔d. HC2H3O2 (aq)
|! |! |! |! |! |! |! |! |! |! |! |! |! |! |! |!



+ OH^- → C2H3O2^- (aq) + H2O (l)
|! |! |! |! |! |! |! |!




True or false: Ba(OH)2 is insoluble in water - Correct answer ✔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 - Correct answer ✔d. a proton transfer reaction
|! |! |! |! |! |! |! |! |! |! |! |!




A diprotic acid has ___ acidic protons.
|! |! |! |! |! |!




a. many
|!




b. 2 |!




c. 3 |!




d. 4 - Correct answer ✔b. 2
|! |! |! |! |! |!




The gas formed when Na2S reacts with H2SO4 is:
|! |! |! |! |! |! |! |!




a. SO3|!




b. SO2|!




c. H2S
|!




d. Cl2 - Correct answer ✔c. H2S
|! |! |! |! |! |!