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H^+ = ka. a
g
=2x10^-4 . 500
500
= 2x10^-4
ph= 4-log 2
sesudah.
H2SO4 +HCOONa -----> HCOOH +Na2SO4
5 500 500
5 5 5
- 495 505
H+ = ka. a
g
= 2x10^-4 . 505
495
=2 x 10^-4 .1,02
=2,04 .10^-4
ph= 4 - log 2,04