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= akar dari Ka/M
0,1 = akar dari 10^-5 / M
(0,1)^2 = 10^-5 / M
0,01 = 10^-5 / M
10^-2 = 10^-5 / M
10^-2 M = 10^-5
M = 10^-5 / 10^-2
M = 10^-3
M = n/V
10^-3 = n/500
10^-3 x 500 = n
0,5 = n
Mr CH3COOH = 60
m = massa
n = m/Mr
0,5 = m/60
0,5 x 60 = m
30 = m
Jadi massa asam asetat yg dibutuhkan adalah 30 gram