Portage Learning CHEM 104 Module 2 Exam

Portage Learning CHEM 104 Module 2 Exam

, Portage Learning CHEM 104 Module 2 Exam

Question 1
Identify each of the compounds below as ACID, BASE or SALT on the basis of their formula and
explain your answer.

(1) Cr(OH)3

(2) HAsO4

(3) CoCO3

Your Answer:

1. base - contains Cr metal + OH polyatomic group

2. acid - contains H + polyatomic group (AsO4)

3. salt - contains Co metal + polyatomic group (CO3)



Question 2
For the Brønsted-Lowry acid base reactions shown below, list the stronger acid, stronger base, weaker
acid and weaker base in the answer blanks provided:

NH4+ + H2PO4- NH3 + H 3PO 4


Stronger acid:

Stronger base:

Weaker acid:

Weaker base:
Your Answer:

Stronger acid: H3PO4

Stronger base: NH3

Weaker acid: NH +
4
Weaker base: H2PO4-