作者onlyveritas ( 食夢者)
看板Chemistry
標題[問題]大學普化問題
時間Thu Mar 6 11:26:00 2014
這是102中正一般化學考古題
單選第6:
You mix 260mL of 1.20M lead(II)nitrate with 300 mL of 1.90M potassium iodide.
The lead(II)iodide is insoluble. Which of the following is FALSE?
(a)The final concentration of Pb2+ ions is 0.0482 M.
(b)You form 131g of lead(II)ioide.
(c)The final concentration of K+ is 1.02 M.
(d)The final concentration of NO3- is 1.02M.
(e)This is a precipitation reaction.
單選第18:
The standard molar free energies of formation of NO2(g) and N2O4(g) at 25度C
are 51.84 and 98.28 kJ/mol, respectively. What is the value of Kp(in atm) for
the recation written as follows at 25度C?
→
2NO2 N2O4
←
(a)1.37x10^8
(b)1.17x10^4
(c)8.84
(d)0.113
(e)7.31x10^-9
以上兩題麻煩高手解惑
謝謝！
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1F：→ o810418:第一題D很明顯NO3-濃度被稀釋超過一半了 不對 03/06 14:23
2F：→ o810418:第二題只要把自由能相減就發現只有E的數字合理 03/06 14:24
3F：→ onlyveritas:多謝啦 03/07 09:42