第四章新答案

第四章新答案

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习题 1 根据表 4-1 中电极的标准电极电势值,判断下列各组中最强的氧化剂和最强的还原剂分 别是哪种物质? (1) Fe 3+ /Fe 2+ ,I 2 /I ,Fe 2+ /Fe (2) MnO 4 /Mn 2+ ,Cl 2 /Cl ,H 2 O 2 /H 2 O 2 298K 时,已知原电池 -3 22 Pt, O (100kPa) | H (0.10 mol dm ) || H ( )|O (100kPa), Pt c ++ 的电动势为 0.010V 。求 H + 离子的浓度 c 为多少? 3 写出下列电池中各电极上的反应和电池反应,并计算电极电势 (1) -3 Pt, H (100kPa) | HCl (0.1mol dm ) | Cl (100kPa), Pt (2) -3 -3 Ag(s) AgI(s) | I (0.1mol dm ) || Br (0.1mol dm ) | AgBr(s) Ag(s) −− + ⋅+ 4 当温度为 298.15K H 2 的分压 p =100 kPa H 离子浓度 c =0.200 3 dm mol 时,求所组 成的氢电极的电极电势。 5 已知 2 3o 27 2 Cr O 14H 6e 2Cr 7H O E 1.232V + += + = + 。按能斯特方程式计算 pH 1 pH 5 时的 E 值各为多少?然后比较溶液酸性对 - 2 7 2 O Cr 氧化性强度的影响。 部分参考答案 1. (1) 查表得到 Fe 3 Fe 2 I 2 I Fe 2 Fe 的标准电极电势分别为 ϕ o Fe 3
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This note was uploaded on 02/18/2012 for the course SCIENCE 1221 taught by Professor Lee during the Spring '10 term at Renmin University of China.

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第四章新答案

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