Question

第三部答案是1.7*10^-5 请问下 是怎么算出来的...

Answer 1

当加入盐酸的体积为20.0mL时,两种物质刚好完全反应,生成c(CH3COOH) = 0.10mol/L

CH3COOH ==可逆== CH3COO- + H+

0.10 1.3×10^(-3) 1.3×10^(-3)

K = c(CH3COO-) c(H+) / c(CH3COOH) = 1.3×10^(-3) * 1.3×10^(-3) / 0.10 = 1.7×10^(-5)