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[OH⁻] = M × valensi basa
= 0,3 × 1
= 0,3 M
B. Ba(OH)₂ 0,4 M
[OH⁻] = M × valensi basa
= 0,4 × 2
= 0,8 M
C. N2H4 0,2 M (Kb = 10-10)
[OH⁻] = √Kb.M
= √(10⁻¹⁰)(0,2)
= 4,5·10⁻⁶ M
SOLVED :)