Assignments:

 1. A basic solution can be defined as one in which

a. [H₃O⁺] is not present
b. [H₃O⁺] is equals to OH^-

2. Which one is a self indicator?

a. K₂Cr₂O₇
b. Cr₂(SO₄)₂
c. KMnO₄
d. H₂C₂O₄.2H₂O

3. Which of the following combinations can't produce a buffer solution?

a. HNO₂ & NaNO₂
b. HCN & NaCN
c. HClO₄ & NaClO₄
d. NH₃ & (NH₄)₂SO₄
e. NH₃ & NH₄Br

4. What is the pH of a solution composed of 0.20 M NH₃ & 0.15M NH₄Cl?

a. 2.15
b. 4.65
c. 8.26
d. 9.38
e. 8.89

5. Calculate the ratio [CH₃COOH]/[CH₃COONa] that gives a solution with pH=5.00?

a. 0.28
b. 0.36
c. 0.44
d. 0.56
e. 0.63