Question

Rank the following titrations in order of increasing pH at the halfway point to equivalence (1 = lowest pH and 5 = highest pH).

1. 200.0 mL of 0.100 M HC₂H₃O₂ (K_a = 1.8 x 10^-5) by 0.100 M NaOH

2. 100.0 mL of 0.100 M HF (K_a = 7.2 x 10^-4) by 0.100 M NaOH

3. 200.0 mL of 0.100 M (C₂H₅)₂NH (K_b = 1.3 x 10^-3) by 0.100 M HCl

4. 100.0 mL of 0.100 M HI by 0.100 M NaOH

5. 100.0 mL of 0.100 M NH₃ (K_b = 1.8 x1 0^-5) by 0.100 M HCl

Rank them in numbers