【简答题】二元弱酸是分步电离的,25时碳酸和草酸的 如下表: H 2 CO 3 K a1 =4.3×10 -7 H 2 C 2 O 4 K a1 =5.6×10 -2 K a2 =5.6×10 -11 K a2 =5.42×10 -5 (1)设有下列四种溶液: A.0.1 mol/L的Na 2 C 2 O 4 溶液 B.0.1 mol/L的NaHC 2 O 4 溶液 C.0.1 mol/L的N...
【简答题】二元弱酸是分步电离的,25时碳酸和草酸的K a 如表: H 2 CO 3 K a1 =4.3×10 -7 H 2 C 2 O 4 K a1 =5.6×10 -2 K a2 =5.6×10 -11 K a2 =5.42×10 -5 (l)设有下列四种溶液: A.0.1mol?L -1 的Na 2 C 2 O 4 溶液B.0.1mol?L -1 的NaHC 2 O 4 溶液 C.0.1mol?L -1...