原帖由 hkicq 於 2006-1-13 19:30 發表
香港既食水處理有加入明礬就係為左將食水由’硬’變’軟’
但係會引致水有鋁既成份.
請問「明礬」係一種甚麼物質?
加入明礬會有甚麼化學反應? |
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原帖由 epsilon 於 2006-1-22 01:43 發表
咁礦泉水係咪硬水的一種?
對。
記得以前係Chem 堂的時候教過...
Soap reacts in Soft water / Soap reacts in Hard Water.. 
之後發現Soap doesn't react in Soft Water"
[ 本帖最後由 tungtung1212 於 2006-1-22 17:21 編輯 ] |
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Connected via Bluetooth
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原帖由 tungtung1212 於 2006-1-22 12:48 發表
對。
記得以前係Chem 堂的時候教過...
Soap reacts in Soft water / Soap reacts in Hard Water..
Soap will react with calcium/magnesium ion in hard water only.
Soap in soft water has no reaction. |
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