[物化] 本週作業提示
各位同學大家好,
我已經把這週的物化作業寫完了,我覺得其中有些地方,若再說明一下,對大家
寫作業會更容易上手些
7.4
要檢驗一組數據是否符合Ostwald dilution law 或其他的定律,model
最簡單的方法就是把數字代進去看看是否符合,這是是看Kd值是否一樣
7.6 及 7.15
會用到一些在7.5 "Independent Migration of ions"的觀念,若先把第285
頁看一遍再寫就會更有感覺些,其中7.6是在應用molar conductivity來找
CaSO4的濃度,但最後在算其Ksp時,是考慮整體的溶液
7.36
在寫這一題時,先把課本第300~302頁看一下會比較容易上手,若想要再熟悉些
有關born's model的部分可看課本第296~297頁
其中a小題是在infinite dilute的情況下,所以作的功可視為只有charge
isolated ion的功(雖然有1莫耳的NaCl但在infinite dilute的情況下,鈉離子
週圍可視為沒有任何離子,氯離子也是)所以把鈉離子charge的功再加上氯離子
charge的功即是此題答案
而b小題,因為不再是infinite dilute,active mean coefficient是0.7
所以週圍會出現ionic atmosphere,所以在這一題的功是把鈉離子,氯離子charge
的功再加上把ionic atmosphere charge的功,而什麼是active mean coefficient
我想也是這一題的重點
7.14, 7.30, 7.35, 7.44
這四題只是練習把數字代進去公式裡,或是用來熟悉公式中每項之間的關係,
或有課本的例題可參考,應該滿容易上手的
希望大家寫物化作業順利,愉快
物化助教 哲嘉
Tel:23123456-88404
E-mail:f97423020@ntu.edu.tw
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