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Reaksi penetralan berlangsung apabila mol HCl = mol (NaOH + KOH)
mol HCl = 0,5M x 0,02 L
mol HCl = 0,01 mol
mol (NaOH + KOH) = 0,1 mol
mol = g/Mr
mol NaOH + mol KOH = 0,1
g/Mr NaOH + g/Mr KOH = 0,1
(4,8-x)/40 + x/56 = 0,1
{56(4,8-x) + 40x}/40.56 = 0,1
56(4,8-x) + 40x = 0,1.40.56
268,8 - 56x + 40x = 224
16x = 44,8
x = 2,8 gram.
Massa NaOH adalah
gr = 4,8 - x
gr = 4,8 - 2,8
gr = 2 gram
Massa KOH adalah x = 2,8 gram