Kak tolong dibantu ya kak, aku kasih 10 poin loh kak v:​

M CH3NH2 = (Massa / Mr) x 1/v = (0,31/32) x 1/1 = 0,01 M

[OH-] = √(M x Kb) = √(0,01 x 4 x 10^-4)

= 2 x 10^-3

pOH = 3 – log 2

pH = 14-(13-log 2) = 11+log2