在100mL2mol/LCH3COOH溶液中加0.02molNaOH固体醋酸电离度=1%,求CH3COOHCH3COO－OH－H＋浓度

Question

在100mL 2mol/L CH3COOH溶液中加0.02molNaOH固体 醋酸电离度=1%,求CH3COOH CH3COO－ OH－ H＋浓度

Answer 1

CH3COOH + NaOH === CH3COONa + H2O
1 mol 1mol
0.02 mol 0.02mol.0.02mol
剩余 CH3COOH 物质的量 0.2 mol - 0.02 mol = 0.18 mol
0.18 mol × 1％ = 0.0018 mol
C(CH3COOH) = 1.782 mol ／L
C(CH3COO-) = 0.2 mol／L
C(H+) = 0.018 mol／L
C(OH-) = 1×10-14／0.018
= 5.6×10-13 mol／L