Bantu Jawab No.5 Guys

V = 250 ml = 0,25 L
n = gr/Mr = 1/ 40 = 0,025
M = n/V = 0,025 /0,25 = 0,1
[OH-] = b. Mb = 1 × 0,1 =0,1 atau 10-1
pOH = 1
pH = 14 – pOH = 14 -1 = 13