向CH3COOH溶液中加入CH3COONa溶液,溶液PH变大.有两种解释; (1)CH3COOH电离成CH3COO+H加入CH3COONaCH3COO浓度增大,抑制CH3COOH电离,H浓度变小,PH变大.(2)CH3COONa水解生成NaOH,NaOH与H反应,H浓度降低,PH值变
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![向CH3COOH溶液中加入CH3COONa溶液,溶液PH变大.有两种解释; (1)CH3COOH电离成CH3COO+H加入CH3COONaCH3COO浓度增大,抑制CH3COOH电离,H浓度变小,PH变大.(2)CH3COONa水解生成NaOH,NaOH与H反应,H浓度降低,PH值变](/uploads/image/z/2347968-48-8.jpg?t=%E5%90%91CH3COOH%E6%BA%B6%E6%B6%B2%E4%B8%AD%E5%8A%A0%E5%85%A5CH3COONa%E6%BA%B6%E6%B6%B2%2C%E6%BA%B6%E6%B6%B2PH%E5%8F%98%E5%A4%A7.%E6%9C%89%E4%B8%A4%E7%A7%8D%E8%A7%A3%E9%87%8A%EF%BC%9B+%EF%BC%881%EF%BC%89CH3COOH%E7%94%B5%E7%A6%BB%E6%88%90CH3COO%2BH%E5%8A%A0%E5%85%A5CH3COONaCH3COO%E6%B5%93%E5%BA%A6%E5%A2%9E%E5%A4%A7%2C%E6%8A%91%E5%88%B6CH3COOH%E7%94%B5%E7%A6%BB%2CH%E6%B5%93%E5%BA%A6%E5%8F%98%E5%B0%8F%2CPH%E5%8F%98%E5%A4%A7.%EF%BC%882%EF%BC%89CH3COONa%E6%B0%B4%E8%A7%A3%E7%94%9F%E6%88%90NaOH%2CNaOH%E4%B8%8EH%E5%8F%8D%E5%BA%94%2CH%E6%B5%93%E5%BA%A6%E9%99%8D%E4%BD%8E%2CPH%E5%80%BC%E5%8F%98)
向CH3COOH溶液中加入CH3COONa溶液,溶液PH变大.有两种解释; (1)CH3COOH电离成CH3COO+H加入CH3COONaCH3COO浓度增大,抑制CH3COOH电离,H浓度变小,PH变大.(2)CH3COONa水解生成NaOH,NaOH与H反应,H浓度降低,PH值变
向CH3COOH溶液中加入CH3COONa溶液,溶液PH变大.有两种解释; (1)CH3COOH电离成CH3COO+H加入CH3COONa
CH3COO浓度增大,抑制CH3COOH电离,H浓度变小,PH变大.
(2)CH3COONa水解生成NaOH,NaOH与H反应,H浓度降低,PH值变大如何证明是(1)而不是(2)
向CH3COOH溶液中加入CH3COONa溶液,溶液PH变大.有两种解释; (1)CH3COOH电离成CH3COO+H加入CH3COONaCH3COO浓度增大,抑制CH3COOH电离,H浓度变小,PH变大.(2)CH3COONa水解生成NaOH,NaOH与H反应,H浓度降低,PH值变
2的解释是说CH3COONa水解生成NaOH的碱性中和了溶液酸性,为了证明它是错的,应该加CH3COONH4溶液,因为该溶液显中性,所以不能中和CH3COOH电离出的氢,而加了CH3COONH4后溶液PH还是变大,就说明是CH3COO-浓度增大,抑制CH3COOH电离,H浓度变小,PH变大.