標題: 一條 AL CHEM的實驗題 [打印本頁] 作者: 卡迪斯圖達 時間: 09-12-14 11:31 PM
標題: 一條 AL CHEM的實驗題
2.There are two method to prepare copper (1) chloride
The 1st method is to mix a copper turning and copper (2) chloride in the presence of sodium chloride The second method is th mix the copper(2)chloride with the sodium sulphate (4) .
(a) why was heat required in 1st method and not in method 2
(b)what causes the dark brown colour in 1st method.
(c)why does the solution in contact with the white solid in 1st method slowly turn blue on standing?