標題: 想問chem [打印本頁] 作者: 碧咸 時間: 22/1/2006 08:16 PM 標題: 想問chem A. Both statements are true and the 2nd statement is a correct explanation of the 1st statement. B. Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement. C. The 1st statement is false but the 2nd statement is true. D. Both statements are false. Sulphur dioxide is an oxidizing agent. Sulphur dioxide can decolorize bromine water. 大家認為係咩答案?作者: 細薯 時間: 22/1/2006 09:49 PM sulphur dioxide SO2-->SO4 2- It oxidize from o.n. +4 to o.n. +6 It is a reducing agent. First statement is wrong.
sulphur dioxide can decolorize bromine water. It is due to the reducing properties of aqueous sulphur dioxide. SO2(aq) + 2 H2O(l) + Br2(aq) --> SO4 2-(aq) + 4 H+(aq) + 2Br-(aq) Second statement is true.