Chem 210 Module 2 WITH 100% RATED CORRECT REAL EXAM QUESTIONS AND CORRECT ANSWERS| GRADED A+ |2025 LATEST VERSION | 100% VERIFIED

Chem 210 Module 2 WITH 100% RATED CORRECT REAL EXAM

QUESTIONS AND CORRECT ANSWERS| GRADED A+ |2025 LATEST

VERSION | 100% VERIFIED


1. Which of the following mol- ecules can form a hydro- C. NH3

gen bond?


A. HBr

B. HCl

C. NH3

D. CH4

E. H2




2. The pH of a solution of 0.0010 M D. 0

NaOH is:
E. 14

A. 1 B.11

B. 11 1.0 x 10^-14 =

[H+][OH-]
C. 8

,1.0 x 10^-14 = 1.0 x 10^-14 /0.0010

1.0 x 10^-11 = H+ pH
[H+][0.0010]




3. The pH of a solution of 8.9 x 10-12M NaOH is:


A. 8.9

B. 8.9 x 10^-12

C. 4.8

D. 11

E.2.9




4. The pH of a solution of 3.2 x 10^-10 M NaOH is:


A. 3.7

B. 3.7 x 10^-10

C. 4.5

D. 13

E. 8.7

,= -log[1.0 x 10^-11] = 11 1.0 x 10^-14 =

[H+][OH-]
E. 2.9

1.0 x 10^-14 =
Kw=[H+][OH-]
[H+][3.2 x
1.0 x 10^-14= [H+][8.9 x
10^-10]
10^-12] [H+]=890 pH=-log[890]
1.0 x 10^-14/3.2 x 10^-
2.9
10
C. 4.5

5. Water is a unique molecule. Which of the following con- tributes to

water's unique place in the chemical world?


A. The geometry of the molecule

B. The polarity of the O-H bonds

C. The ability of water molecules to hydrogen bond

D. The bond angle of water

E. All of the answers are correct

= [H+] 3.25 x 10^-5

= [H+] pH = -log

, [H+] pH = -log [3.25

x 10^-5] pH = 4.5

E. All of the answers

are correct

6. What factor contributes to the bent shape of a water molecule? A.

The dipole arrows in a water molecule

B. The unshared electron pairs on the oxygen atom C. The

electronegativity differ- ence between hydrogen and oxy- gen

D. The unequal electron sharing between hydrogen and oxygen E. None

of the answers are cor- rect

B. The unshared

electron pairs on the

oxygen atom




7. The H+ concentration of a solu- tion is 5.6 x 10^-5. What B. 4.25

is the pH? [H+] = 5.6 x 10^-5