102年高考環化與環微- 零價鐵整治TCE - 高考
By Agnes
at 2013-10-13T15:35
at 2013-10-13T15:35
Table of Contents
[考題] 國考歷屆考題與考題觀念討論(書裡看到的選這個)請附上想法、出處
【考題出處:102年高考環化與環微】
【題目】以零價鐵(Fe)在污染地下水層中作成鐵牆(iron wall),整治遭
三氯乙烯(TCE)及四氯乙烯(PCE)污染之地下水。反應式如下:
Fe + C2HCl3 + H2O → Fe2+ + C2H4 + Cl- + OH-
Fe + C2Cl4 + H2O → Fe2+ + C2H4 + Cl- + OH-
(1)平衡上述化學式。(5 分)
(2)若某地下水中TCE 濃度為270 ppm,PCE 濃度為53 ppm,
如果1000g 此地下水要完全分解其中的TCE 及PCE,需要
多少克之Fe?(10 分)
(TCE 及PCE 分子量分別為131.4,165.8;Fe 原子量55.9)
【想法】
1.這題得”0分”,冏
2. (1)我的答案:
2 Fe + C2Cl4+ C2HCl3+2 H2O → 2Fe2+ +2 C2H4 +2 Cl- + 2OH-
但得0分,冏
(2)第一題錯,連帶第二題也錯了 >___<
還盼不吝解惑與提供建議,謝謝您 ^^
祝您 心想事成 平安喜樂
--
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