2005年1月8日
忍無可忍
Hey,
My name is Sxxxxx and I'm in your section AE. I was wondering if you could go over perhaps two or three of the titrations for the second prelab.
The one where you are trying to find the PH. I was wondering if you could do 0.00mL and perhaps 1 or two of the other ones.
I konw it's hard to explain stuff through e-mail but your office hours aren't in time for when the lab is due. :(
Thanks for whatever help you can provide.
~ Sxxxxx, Chem 152 student
Sxxxxx,
For the 0.00 mL NaOH, think about how you calculate Ka. Apply the ICE box, you do this:
{X^2 / [H+]-X }= Ka
Does it ring the bell??
And one exmple for titration, use pH = pKa + log [base]/[acid]
If you have any more problems, feel free to e-mail me.
-Mimi-
I was wondering if you could actually go all the through the 0.00 and say like 4.00. I was wondering if I could see it be done from start to finish to see where I'm going wrong.
~ Sxxxxx, Chem 152 student
Sxxxxx,
Humm......I'm not so sure what your question is.
Do you mind telling me how exactly you calculate it so far??
-Mimi-
Let's say it was you answering the problem from Pre Lab # 2.
Can you show me all the steps you would do in order to to calcuate the PH after adding 0.100M NaOH to Acetic Acid. What is the pH if you add 0.00 mL or 5.00 mL.
How would you go about solving it from start to finish. I kind of wanted to see that.
~ Sxxxxx, Chem 152 student
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夠了!!!
第一, 我的 office hour 是星期一的中午, 你的 due time 是星期一的晚上. 你是絕對可以到我的 office hour 來問我的, OK!?
第二, 我問你東, 你給我回答西. 你TMD給我裝白痴啊!? 我叫你告訴我你到底是怎麼算的, 你還竟然反過來叫我一步一步算給你看!? 你八成是不想做你自己的作業, 要我幫你寫吧!?
第三, 我不是已經給了你公式和提示嗎!? 你是 Chem 142 沒畢業啊??? 這些是複習耶!! 你的課本是買來"供起來上香"用的喔???
想到就氣...........................
posted by Biochemie on 10:37 上午
1 comments
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