2 liter larutan KOH dengan pH = 14. Jika Mr KOH = 56, banyaknya KOH yang dilarutkan adalah ... gram. a. 28 b. 56 c. 168 d. 224 e. 112

pH = 14
pOH = pKw - pH
pOH = 14 - 14
pOH = 0

[OH-] = 10^-pOH
[OH-] = 10^0 = 1 M

[OH-] = b × [KOH]
[KOH] = 1 × 1 M = 1 M

n = M × V = 1 M × 2 L = 2 mol

massa = n × Mr = 2 mol × 56 = 112 gram

Jawaban : E