Chem aspirin water solubility

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".

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:
:):):)