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pH = 2 ==> [H⁺] = 10⁻²
[H⁺]campuran = 10⁻¹ + 10⁻² = 11 x 10⁻²
pH campuran = -log[H⁺] = -log(11 x 10⁻²) = 2 - log11
Ph 2 -> 10^-2
400x0,1 + 100x0,01 / 500
= 0,082
Ph = -log82x10^-2
Ph= 2-log82