CHEM 1B  Dr. R. Rinehart
ACIDS and BASES
PROBLEM PROTOTYPES

NOTE: Quiz 3 will also contain definitions and other types of questions in addition to problems!

1. A weak acid ( or weak base) is found to be ____% dissociated at a pH (pOH) of _____.
Calculate its K_a  <or pK_a> (K_b or pK_b)

2.  ___ moles of a specified salt [made up of familiar ions, K_a  or pK_a (K_b or pK_b) will be given] is dissolved in enough water to make ____ mL of solution. Is the resulting solution acidic or basic?
Calculate its pH.

3.    ___ moles of specified weak acid or weak base [K_a  or pK_a (K_b or pK_b) will be given] is dissolved in enough water to make ____ mL of solution. Calculate its pH.

4.  A buffer solution is made up by dissolving  ___ moles of specified weak acid or weak base and
___ moles of its salt [made with a strong acid or base] in enough water to make ____ mL of solution.
[K_a  or pK_a (K_b or pK_b) will be given]. Calculate its pH. Calculate its pH after the addition of ____ mL of ____ M [strong acid or strong base] <or after the addition of ___ mol of  H₃O⁺ or OH^->

5.  An inorganic salt or metal hydroxide [perhaps identified by its name, in which case you will be expected to write its formula] is dissolved in water. Is the resultant solution acidic or basic?

6. A ___ M solution of a weak acid [or weak base] has a pH of _____. Calculate its K_a  or pK_a (K_b or pK_b) .

© Ronald W. Rinehart, 2003