【判断题】Some people prefer to work more than 40 hours a week so as to let their superiors see th6:Some people prefer to work more than 40 hours a week so as to let their superiors see their long-time hard wor...
【简答题】已知H 2 R 2 O 4 在水溶液中存在以下电离: 一级电离:H 2 R 2 O 4 △ . H + +HR 2 O 4 - 二级电离:H 2 R 2 O 4 - △ . H + +R 2 O 4 2- 请回答一下问题: (1)将0.1mol?L -1 的NaOH溶液与0.05mol?L -1 的H 2 R 2 O 4 溶液等体积混合,冷却至室温测得溶液的pH______(填“等于7”、“大于7...