hitunglah ph larutan bufer yang dibuat dari campuran 50 ml ch3cooh 0,1m dan 50ml NaCH3coo 0,1m????? please jawab gan

(KaCH3COOH = 1,8 × 10–5)

50 mL CH3COOH 0,1 M + 50 mL NaCH3COO 0,1 M
mol CH3COOH = 50 mL × 0,1 mmol/mL= 5 mmol
mol NaCH3COO = 50 mL × 0,1 mmol/mL= 5 mmol
pH = pKa – loga/g
pH = – log 1,8 × 10–5 – log5/5
pH = – log 1,8 × 10–5
pH = 5 – log 1,8
= 4,75