Consider the titration of a 28.0 -mL sample of 0.125 M RbOH with 0.110 M HCl. Determine each of the following.?

a) the initial pH
b) the volume of added acid required to reach the equivalence point
c) the pH at 5.1 mL of added acid
d) the pH at the equivalence point
e) the pH after adding 4.2 mL of acid beyond the equivalence point
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