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= 0.05/0,25
= 0.2
(h+) = 0.4
PH= -log4*10^-1
= 1 - log4
M= 0,05 mol/ 0,25 L
M= 0,2 M
[H⁺]= Ma x Va
[H⁺]= 0,2 x 2 = 0,4 = 4x10⁻¹
PH= - log 4x10⁻¹
PH=1-log 4
Jawabannya adalah D