f.4 chemistry
2006-10-14 11:25 pm
我想問有d ion 係aqueous state ge時候係有colour,咁我想問黎d inos ge compounds係solid state ge 時候會ng會有返個種ion ge colour?
回答 (3)
2006-10-15 2:05 am
✔ 最佳答案
在水中所呈現的顏，是它的水合離子，並不是它的簡單離，例如銅在水中是Cu(H2O)62+而並不是簡單地Cu2+。在五水硫酸銅中，它也是一個水合離子，所以是藍色的。無水硫酸銅就是一個無色化合物啦。但這並不表示任何離子也一樣，很多存在於礦石/玻璃中的離子使礦石/玻璃呈現特殊的顏色。[本人是一位化學科教師，教了廿多年，明白Yahoo為什麽為我寫成小學五年級。]
2006-10-15 5:46 am
首先要清楚明白到令solution有colour的是ion,不是compound or molecule
例如copper(II) sulphate,在aqueous state係blue in colour,但在solid state
係白色ge,因為係aqueous state時,在solution含有4重ion,copper(II) ion,
hydrogen ion,hydroxide ion,sulphate ion,而其中copper(II)ion令solution
變做blue in colour,而在solid state,只有copper(II) sulphate compound 存在
,沒有copper(II) ion 的存在,所以沒有colour.
iron(II) sulphate , zinc nitrate 也是同樣道理
例如copper(II) sulphate,在aqueous state係blue in colour,但在solid state
係白色ge,因為係aqueous state時,在solution含有4重ion,copper(II) ion,
hydrogen ion,hydroxide ion,sulphate ion,而其中copper(II)ion令solution
變做blue in colour,而在solid state,只有copper(II) sulphate compound 存在
,沒有copper(II) ion 的存在,所以沒有colour.
iron(II) sulphate , zinc nitrate 也是同樣道理
參考: me
2006-10-14 11:48 pm
NO.
take CuSO4 as example.Cu2+ gives blue colour .In solid state, only CuSO4 present but not Cu2+. So no blue colour can be seen.
In aqueous state, CuSO4 ionize to form Cu2+ and SO4 2- .
Cu2+ is present to give the blue colour
take CuSO4 as example.Cu2+ gives blue colour .In solid state, only CuSO4 present but not Cu2+. So no blue colour can be seen.
In aqueous state, CuSO4 ionize to form Cu2+ and SO4 2- .
Cu2+ is present to give the blue colour
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