URGENT!!! 關於sodium acetate 同hot ice....

2008-01-22 4:49 am

請問有誰可以告訴我詳細的supersaturated sodium acetate solution 變 HOT ice (supercooling) 實驗的份量+過程+注意事項.....

點解我做極都做唔到....

以下是我幾次的程序:

1 將水(水喉水)倒落個兜到
2 將d sodium acetate 倒落水直到溶唔到
3 跟住放上爐到
4 再加差唔多一倍以上的 sodium acetate 落去熱.
5 熱到有少少氣, 就熄火
6 就咁放係到放涼
7 但係之後佢就無lala自己結晶
8 但係唔係HOT ice個種

回答 (1)

用戶221652

2008-01-22 5:14 pm

✔ 最佳答案

有一點,你要注意,因為這個是快速結晶實驗,若你想Sodium acetate的結晶漂亮一點，結實一點，第一，你要用一點”種子”即一塊小小的Sodium acetate的結晶，第二，降溫的速度不能太快．你可以參考一下參考資料，其中文中指出
”However, the video failed to mention that he had some Sodium acetate on the tip of his finger. You need a seed crystal to start the reaction. Also it is not really solid ice but more of a mush like mud.”

參考: http://www.thethinkingblog.com/2007/07/supersaturated-solution-crystallizing.html

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