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Pembahasan
mol NH4OH = 0,4 . 100 mL = 40 mmol
mol HCl = 0,1 . 400 = 40 mmol
Dari reaksi tersebut dapat kita ketahui reaksi antara asam kuat dan basa lemah dan hanya menyisakan 40 mmol garam.
H+ =
pH = - log H
= - log 2x10^-5,5
= 5,5 - log 2
Semoga membantu :) D