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=(0,002/10) x 2
=0,0004= 4 x 10^-4
maka pOH = 4-log 4
pH= 14 -(4-log4) = 10+log4
= 0.002 : 10
2×10^-4
OH- = 2 × M
= 4×10^-4
pOH = 4 -log 4
pH = 10+log4 (e)