作者vicboyso (Vic)
看板TransBioChem
标题[问题] Buffer 's question
时间Wed Jul 7 22:34:29 2010
A buffer is made by adding 0.600 mol CH3COOH and 0.3 mol NaOH to enough water
to enough wter to make 1.00L of solution. Calculate the pH of this solution
以下是我的算法
﹝-OAc﹞= (0.600 - 0.300)
_______________ = 0.300 M
1. 00L
pH = pKa + log ﹝-OAc﹞
________=
﹝HOAc﹞ pKa + log 1 = ?
pKa 一直算不出来也 ?????????
该怎麽处理哩?? 感谢!!!
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1F：推 nodal:题目没给CH3COOH的Ka吗? 1.8*10^-5 <~Ka 07/07 22:46
2F：推 nodal:这题是最大缓冲溶液 PH=PKa 07/07 22:50
3F：→ vicboyso:没有给 我以为要自己算 87年台大B卷 请问这要个背起来吗? 07/07 22:53
4F：→ nodal:我也没有背耶~不过这题应该是要自己背ka 07/07 22:57