Question

Berapa tetes larutan NaOH 2 M harus ditambahkan keoada 11 liter air minum agah pH larutan =11? Tiap 1 ml laritan NaOH = 20 tetes (dianggap volume tidak berubah)

Answer 1

PH = 11 ⇒ pOH = 3 ⇒[OH-] = 10^-3
M2 = 10^-3
V2 = 11000 ml
M1 = 2 M
v1  = ?
M1.V1 = M2.V2
⇔ 2.V1 = 10^-3 . 11.10^3
    2,V1 = 11
       V1 = 5,5 ml = 5,5 x 20 tetes =110 tetes