Question

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

1 2 3 4 5  100.0 mL of 0.100 M HNO₂ (K_a = 4.0 x 10^-4) by 0.100 M NaOH

1 2 3 4 5  100.0 mL of 0.100 M HOCl (K_a = 3.5 x 10^-8) by 0.100 M NaOH

1 2 3 4 5  100.0 mL of 0.100 M C₂H₅NH₂ (K_b = 5.6 x 10^-4) by 0.100 M HCl

1 2 3 4 5  100.0 mL of 0.100 M NH₃ (K_b = 1.8 x1 0^-5) by 0.100 M HCl

1 2 3 4 5  100.0 mL of 0.100 M KOH by 0.100 M HCl

Answer 1

Rank the following titrations in order of increasing pH at the equivalence point of the titration (1 = lowest pH and 5 = highest pH). 1 2 3 4 5 100.0 mL of 0.100 M HNO2 (Ka = 4.0 x 10-4) by 0.100 M NaOH 4 1 2 3 4 5 100.0 mL of 0.100 M HOCI (Ka = 3.5 x 10-8) by 0.100 M NaOH 5 12345 100.0 mL of 0.100 M C2H5NH2 (Kb = 5.6 x 10-4) by 0.100 M HCL 2 1 2 3 4 5 100.0 mL of 0.100 M NH3 (Kb = 1.8 x1 0-5) by 0.100 M HCL 4 1 2 3 4 5 100.0 mL of 0.100 M KOH by 0.100 M HCI 3 weaker the acid stronger the basic nature nature of salt so highest the pH. weaker the base stronger the acidic nature of salt so lowest pH.