BA
48. Calculate the pH at the equivalent point in the titration of 40ml of 0.025M benzoic
↳
苯甲酸 CH602
84+6+32
acid(Single proton acid) with 0.5M NaOH.
(Ka of benzoic acid = 6.3x10-5)
A6.50 (B) 8.21 (C)10.01 (D) 7.30
[base).
PH= Pka + hoy (12121212 = Pkat bay
Tacid)
(m)
mx份起
0.025x0,04x122
122
.C-OK
=122
