18. Aqueous Equilibrium

Consider the titration of 30.0 mL of 0.100 M HC₂H₃O₂ with 0.100 M NaNH₂. Which volume of NaNH₂ would take place within the buffer region? 

a) 30.0 mL                    b) 50.0 mL                    c) 10.0 mL                     d) 100.0 mL                   e) 1.5 L

In titration of NH₃ and HCl, what is the predominant species beyond the equivalence point?

a) NH₃                                      b) HCl                                       c) CH₃NH­₂                                d) Cl^–

The following figure represents solutions at various stages of the titration of a weak acid, HA, with NaOH. (The Na+ ions and water molecules have been omitted for clarity.) To which of the following regions of the titration curve does each drawing correspond: (b) after addition of NaOH but before the equivalence point? [Section 17.3]

Which data set, of the two graphed here, would you expect to observe from a titration like that shown in Figure 4.18?

The accompanying graph shows the titration curves for two monoprotic acids. (d) Estimate the pKa of the weak acid.

Determine whether each of the following statements concerning the titrations in Problem 17.35 is true or false. (b) The titration curves will both be essentially the same after passing the equivalence point.