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perbandingan vb : vg = 1 : 2
pH = 9
pOH = 5
OH^- = 10^-5
OH^- = Kb x MVb / 2M Vg
10^-5 = 2.10^-5 x 0,2 Vb / 0,2 Vg
Vb / Vg = 1 / 2