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0,2 x 10 x 1 = 0,2 x V x 1
V = 2/0,2
V = 10 ml
mol HA = 0,2 x 10 = 2 mmol
mol NaOH = 0,2 x 10 = 2 mmol
direaksikan dulu, ketemu:
OH+ = √Kw/Ka x mol garam/volume total
OH+ = √10^-14/10^-5 x 2/20
OH+ = √10^-10
OH+ = 10^-5
pOH = -log 10^-5
pOH = 5
pH = 14 - 5
pH = 9