Chem aspirin water solubility

[匿名]

2014-08-11 8:45 am

my teacher said Aspirin does not cmopletely dissolve in water, why??

thanks

回答 (2)

用戶26240

2014-08-12 2:28 am

✔ 最佳答案

Thestructure of aspirin molecule is shown below :

圖片參考：https://s.yimg.com/lo/api/res/1.2/V5KLvXQbwxcpx2SV6nUCYg--/YXBwaWQ9dHdhbnN3ZXJzO3E9ODU-/https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcSIcqvIq7VBVBsQnCX-BXlNpJD-RpTTewDm3elg57fgzQhzzxJLNg

https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcSIcqvIq7VBVBsQnCX-BXlNpJD-RpTTewDm3elg57fgzQhzzxJLNg

In aspirin molecule, only the -COOH group (circled) enhances aspirin to dissolve in water to a certain extent, but the other large organic part make it insoluble in water. Therefore, the solubility of aspirin is low. At 20°C, thesolubility of aspirin is 0.3 g per 100 mL of water.

2014-08-11 18:30:20 補充：
To 楠妹妹：

-COOH group is named as "-carboxyl group", but NOT "hydrogencarbonate".

參考: 土扁, 土扁

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ZZZ

2014-08-11 9:11 am

會语會係因為佢contain hydrogencarbonate?

2014-08-11 17:40:35 補充：
haha sor for replying late
大家一起努力溫chem!

2014-08-11 19:39:45 補充：
哈哈不好意思我Chem不太好，謝謝土扁的糾正！

2014-08-11 19:39:58 補充：
To LLL:
:):):)

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