CHM112 Home Page Reference Materials Homework Assignments Lectures Exams & Quizzes Grades Study Aids URI Home Page


1. Identify the acid, base,conjugate acid, and conjugate base in the following reaction:

HCl(aq) + (CH3)NH2(aq) (CH3)NH3+(aq) + Cl-(aq)



2. Identify the Lewis acid and Lewis base in the following reaction:

Fe2+(aq) + 6H2O(l Fe(H2O)62+(aq)



3. Complete and balance the following reactions:

a. HI(aq) + H2O(l)
b. H2O2(aq) + H2O(l)
c. NH4+(aq) + H2PO4-(aq)
d. CN-(aq) + H2CO3(aq)

4. Find the pH of the following solutions at 25 oC:

a. 0.0056 M nitric acid
b. 1.00 g of hydrogen chloride dissolved in 1.00 L of water
c. 6.2×10-5 M solution of calcium hydroxide.

5. Find the hydronium ion and hydroxide ion concentrations for the following solutions at 25 oC:

a. a perchloric acid solution with pH = 2.35
b. a solution prepared by dissolving 1.00 g of lithium hydroxide in 1.00 L of water
c. a 3.6×10-4 M solution of magnesium hydroxide
d. a sodium hydroxide solution with pOH = 4.1

6. For each of the following, indicate the stronger acid.

a. H2S, H2Te
b. HClO3, HClO2
c. NH3, NH2-

7. A 0.0045 M solution of an acid was found to be 0.033% ionized at 25 oC. Find the pKa of the acid.



8. Find the pH of a 0.037 M solution of cyanic acid, HOCN, at 25 oC.