Question

A.) A volume of 500.0 mL500.0 mL of 0.160 M0.160 M NaOHNaOH is added to 545 mL545 mL of 0.250 M0.250 M weak acid (?a=6.31×10−5).(Ka=6.31×10−5). What is the pHpH of the resulting buffer?

HA(aq)+OH−(aq)⟶H2O(l)+A−(aq)

pH: ????

B.) Calculate the pH for each of the cases in the titration of 25.025.0 mL of 0.1000.100 M pyridine, C5H5N(aq)C5H5N(aq) with 0.1000.100 M HBr(aq)HBr(aq).

A. before addition of any HBr

B. after addition of 12.5 mL of HBr

C. after addition of 24.0 mL of HBr

D. after addition of 25.0 mL of HBr

E. after addition of 29.0 mL of HBr

Answer 1

according to HomeworkLib policy we have to done one question please post to the remaining question thanq

Soluton Gven that Moley of NaoH6.160 x 500m t gommol Moley aadHa) : 0950 x 5u5 m 136.25 chemica eacon HANaoH NaAt H20 Hole o NaA:80 mmk loly o HA emanium 36.25 80 56.25mm FrOm hendeaen hawelbath eauadion PtPalog Na HA l0g6.31x10 log 56.95 4.19 0 152 PHu.35