室温下向10ml ph=3的醋酸溶液中加水稀释(CH3COOH-)/(c(CH3COO+)·c(OH-))的比值不变
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 23:19:44
![室温下向10ml ph=3的醋酸溶液中加水稀释(CH3COOH-)/(c(CH3COO+)·c(OH-))的比值不变](/uploads/image/z/4871509-61-9.jpg?t=%E5%AE%A4%E6%B8%A9%E4%B8%8B%E5%90%9110ml+ph%3D3%E7%9A%84%E9%86%8B%E9%85%B8%E6%BA%B6%E6%B6%B2%E4%B8%AD%E5%8A%A0%E6%B0%B4%E7%A8%80%E9%87%8A%28CH3COOH-%29%2F%28c%28CH3COO%2B%29%C2%B7c%28OH-%29%29%E7%9A%84%E6%AF%94%E5%80%BC%E4%B8%8D%E5%8F%98)
室温下向10ml ph=3的醋酸溶液中加水稀释(CH3COOH-)/(c(CH3COO+)·c(OH-))的比值不变
室温下向10ml ph=3的醋酸溶液中加水稀释(CH3COOH-)/(c(CH3COO+)·c(OH-))的比值不变
室温下向10ml ph=3的醋酸溶液中加水稀释(CH3COOH-)/(c(CH3COO+)·c(OH-))的比值不变
CH3COOH ==可逆== H+ + CH3COO-
Ka = c(H+) * c(CH3COO-) / c(CH3COOH),
平衡常数Ka只与温度有关,与其他因素无关.
温度不变,Ka不变,
所以 c(CH3COOH) ÷ [c(H+) * c(CH3COO-)] = 1/Ka 也不变
所以 c(CH3COOH) ÷ [ Kw/c(OH-) * c(CH3COO-)] 不变