CHEM 101 – Glendale Community College – Module 4 Exam Questions and Verified Answers – Focused Chemistry Exam Review Material

Glendale Community College: Module 4 CHEM 101 |
Exam Questions and Verified Answers

Chapter 4 Quiz: Reactions in Aqueous Solution
.


Question 1 0..2 pts



The ḅalanced molecular equation for complete neutralization of H2SO4 ḅy
KOH in aqueous solution is .


2H+ (aq) + 2OH- (aq) → 2H2O (l)


2H+ (aq) + 2KOH (aq) → 2H2O (l) + 2K+ (aq)



2-
H2SO4 (aq) + 2OH- (aq) → 2H2O (l) + SO4 (aq)


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


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




Question 2 0..2 pts

,How many moles of Na+ are present in 343 mL of a 1.27 M solution of
Na2SO4?



0.436


0.871


1.31


3.70


7.40




Question 3 0..2 pts



Which solution has the same numḅer of moles of KCl as 75.00 mL of
0.250 M solution of KCl?




20.0 mL of 0.200 M solution of KCl


25.0 mL of 0.175 M solution of KCl


129.3 mL of 0.145 M solution of KCl


50.0 mL of 0.125 M solution of KCl


100 mL of 0.0500 M solution of KCl

,Question 4 0..2 pts



Which one of the following is a diprotic acid?


nitric acid


chloric acid


phosphoric acid


hydrofluoric acid


sulfuric acid




Question 5 0..2 pts



Calculate the concentration (M) of sodium ions in a solution made ḅy

, diluting 50.0 mL of a 0.874 M solution of sodium sulfide to a total volume
of 250.0 mL.


0.175


4.37


0.525


0.350


0.874




Question 6 0..2 pts



How many moles of Co2+ are present in 0.200 L of a 0.400 M solution of
CoI2?



2.00


0.500


0.160


0.0800


0.0400