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[OH⁻] = √Kw/Ka • M garam
[OH⁻] = √Kw/Ka • M CH₃OO⁻
[OH⁻] = √10⁻¹⁴/2 x 10⁻⁵ • 0,002
[OH⁻] = √10⁻¹²
[OH⁻] = 10⁻⁶
pOH = -log [OH⁻]
pOH = -log [10⁻⁶]
pOH = 6
pH = 14 - pOH
pH = 14 - 6
pH = 8
Jadi, pH larutan adalah 8