Please complete the following problems on a separate sheet of paper. You may work together to solve
the problems, but each student must turn in their own individual assignment. The homework will be
collected at the beginning of class on the due date.
1.) Complete the following table
[H3O+]
[OH-]
pH
pOH
Acidic, Basic, or
Neutral?
1.0 x 10-6 M
3.49
2.8 x 10-5 M
2.00
2.) Phosphoric acid (H3PO4) dissociates in water to form dihydrogen phosphate (H2PO4-). Phosphoric acid
has a Ka of 7.5 x 10-5. What is the concentration of [H3O+] and pH of a solution of 0.100 M H3PO4?
3.) Aniline, C6H5-NH2, a weak base with a Kb of 4.0 x 10-10, reacts with water to produce its conjugate acid
C6H5-NH3+. What is the concentration of [H3O+] and pH of a solution of 0.100 M C6H5-NH2?
4.) Determine whether each of the following salts will produce an acidic, basic, or neutral solution when
dissolved in water.
a.) NH4Br
b.) MgCl2
c.) CH3COO-Na