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m 1 mmol 0,5 mmol -
b 0,5 mmol 0,5 mmol 0,5 mmol 0,5
s 0,5 - 0,5
Digunakan Ka CH3COOH = 1,8 x 10^-5
[H+] = Ka . asam/garam
= 1,8 x 10^-5 (0,5/0,5)
= 1,8 x 10^-5 M
pH = 5 - log 1,8