tolong kak adiknya plis

No 5
Cari mol KOH = V*M = 1 * 0,05 = 0,05 mol
Mol CH3COOH = 1*0,5

H + = Mol CH3COOH/molCH3COOK * Ka
= 0,45/0,05 * 10 pangkat -5
= 9*10 pangkat-5
PH 5-log 9