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CHEM 104 Module 3 Exam Portage Learning Exam Questions & Correct Answers | 100% Verified.

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CHEM 104 Module 3 Exam Portage Learning Exam Questions & Correct Answers | 100% Verified. CHEM 104 Module 3 Exam Portage Learning Exam Questions & Correct Answers | 100% Verified. CHEM 104 Module 3 Exam Portage Learning Exam Questions & Correct Answers | 100% Verified.

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CHEM 104 Module 3 Exam Portage Learning Exam Questions &
Correct Answers | 100% Verified.


Question.

Identify the conjugate base in the reaction shown here.

HClO2(aq) + H2O(l) ⇌ H3O+(aq) + ClO2-(aq) - ✓✓ Ans ClO2-



Question.
Which ion will be basic in aqueous solution?



a. Br-

b. NO3-

c. HSO4-

d. SO32- - ✓✓ Ans d. SO32-



because SO32- is the conjugate base of a weak acid in an aqueous solution.



Question.
Which pair is a Brønsted-Lowry conjugate acid-base pair?



a. NH3; NH4+

b. H3O+; OH-

c. HCl; HBr

d. ClO4-; ClO3- - ✓✓ Ans a. NH3; NH4+



Question.
Consider the given acid ionization constants and identify the strongest conjugate base.



ACID: Ka:

1|Page

, HNO2(aq). 4.6 x10-4

HCHO2(aq). 1.8 x10-4

HClO(aq). 2.9 X10-8

HCH(aq). 4.9 X10-10



a. NO2− (aq)

b. CHO2− (aq)

c. ClO− (aq)

d. CN− (aq) - ✓✓ Ans d. CN- (aq)



Question.
The weaker the acid the _______ the conjugate base - ✓✓ Ans stronger



Question.
What is the OH- concentration in an aqueous solution at 25 ºC in which [H3O+] = 1.9 × 10−9
M?



a. 1.9 × 10−9 M

b. 5.3 × 10−6 M

c. 1.9 × 105 M

d. 1.9 × 10−23 M - ✓✓ Ans b. 5.3 X10-6



Question.
An HNO3 (aq) solution has a pH of 1.75. What is the molar concentration of the HNO3 (aq)
solution?



a. 1.75 M

b. 5.6 x 10−13 M

c. 56 M


2|Page

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