Question

Terdapat 100 ml lartn NaF 0,075 M. Jika Ka HF 6,8.10^-4 tntkn pH lrtan tsb.
Tlong bntu ya.... Trmksh

Answer 1

OH^- = √ (Kw ÷ Ka) × M
       = √ ( 10^-14 ÷ 6,8 × 10^-4) × 75 × 10^-3
       = 10^-6
pOH = 6 ⇒ pH = 8