某电极的电极反应为[tex=13.0x1.286]9aYde3FYgEAiKHDWbeLppNHQs5NFQkKMzeG93tOKaAkXRfH3ZaNoSbMAmuPHkwNw0esxX15BoUpOXzxy791mEg==[/tex]试求算[tex=2.143x1.071]XPYuqyrB5+uDR4zwRjgs8A==[/tex] 时该电极的标准电极电势 [tex=1.286x1.357]+XOCX3dCmcD3ASKyTc1XnVPIrhC9sM5t+jQioWMJY04=[/tex]。已知水的离子积 [tex=13.071x1.571]QxgabVlYxvckfYvfHwAxLVnd8AS2KJsWY5eFKAiWfDWd+Rfecu5OwrrUspAeOvxK5n3tOeIXS8RIpSpoknhvVy4y9oW/tz+H17+VA599yIo=[/tex]电极[tex=11.643x1.286]RKaRlfkYBb37yuGiSMfS0rZCtSGMgKoN9FPcKKKkBCAR0KreV/BAjKz6EcHnmI8PcD67hjOCOoPrSX0wils/DA==[/tex]和[tex=12.429x1.286]aSQnTvopu8rQZn5EKFI2tR9ijCcphSSp25pnU47eXbsSrP2sTs7iSMEcKG31DXv68/pjSIbLswKmYZF0qkRfRg==[/tex]的标准电极电势分别为 0.680 和[tex=2.929x1.0]irToGO3kyAfpWW946bUEoQ==[/tex]。

2022-06-14

某电极的电极反应为[tex=13.0x1.286]9aYde3FYgEAiKHDWbeLppNHQs5NFQkKMzeG93tOKaAkXRfH3ZaNoSbMAmuPHkwNw0esxX15BoUpOXzxy791mEg==[/tex]试求算[tex=2.143x1.071]XPYuqyrB5+uDR4zwRjgs8A==[/tex] 时该电极的标准电极电势 [tex=1.286x1.357]+XOCX3dCmcD3ASKyTc1XnVPIrhC9sM5t+jQioWMJY04=[/tex]。已知水的离子积 [tex=13.071x1.571]QxgabVlYxvckfYvfHwAxLVnd8AS2KJsWY5eFKAiWfDWd+Rfecu5OwrrUspAeOvxK5n3tOeIXS8RIpSpoknhvVy4y9oW/tz+H17+VA599yIo=[/tex]电极[tex=11.643x1.286]RKaRlfkYBb37yuGiSMfS0rZCtSGMgKoN9FPcKKKkBCAR0KreV/BAjKz6EcHnmI8PcD67hjOCOoPrSX0wils/DA==[/tex]和[tex=12.429x1.286]aSQnTvopu8rQZn5EKFI2tR9ijCcphSSp25pnU47eXbsSrP2sTs7iSMEcKG31DXv68/pjSIbLswKmYZF0qkRfRg==[/tex]的标准电极电势分别为 0.680 和[tex=2.929x1.0]irToGO3kyAfpWW946bUEoQ==[/tex]。

答案：

解 电极电势不是容量性质,不像[tex=1.714x1.0]6wIEserihVxNqxanRdbAnA==[/tex] 和 [tex=1.643x1.0]ANzL9xCopGR0wrp3d8wBkw==[/tex] 那样具有简单的加和性。但电极电势和相应的电极反应的 [tex=1.643x1.0]ANzL9xCopGR0wrp3d8wBkw==[/tex] 有定量关系,因此可以通过电极反应的 [tex=1.643x1.0]ANzL9xCopGR0wrp3d8wBkw==[/tex] 加和来求电极电势。[tex=23.143x1.286]N77NLB+c/BVf4jgsJvtvlpp9mVOIwPliIYPhxiz6sanqDRBCnR50HQS+RJKv9QEyaB+rU8kVNg4p5gepdpNMPJ3zFNNx0Rjb4JaEEHNNoyhBqr+hUOPrPi8cz2q4HBoQVHS1LrwRLfir/S2rx8qqjI33Ir/WSEQwYBxSmf/fgVw=[/tex][tex=24.429x1.286]l3l+OskveW21Nqvt62/89e9nSe9iIwU7HJpBEDKAg17Z32L5gtcZBPcv5YVeZJNv3mN1EtzLjtiPeEL2OENaJDCsLUrK8QsmU1m6Yj9qfVw4qMjF9rL44S4wHkUy/uqfdDd+MhtF0RuZi3z95nj5VblrsM7h25El4xvHwzsQ0f8=[/tex][tex=20.071x1.286]EIwHymGmbcZn8P8YyXeZTgx0zawRj6EydPlMs4gO522Y/gL2BwzNO/PXoqdGal3T/4wibTFKS6uCgXA/EqESe08rHot1O9rPYEbnWqybhNb8Nt/LsmVdWsYP17a7rRFN[/tex][tex=24.429x1.286]LYANmSYV9170mQ5QLpbbvksj8p9wLW+UbTZ4uXCCgynfc63z7YQP19fOduZwWEkw57sGlt/SqJYLVfIo7ujCrlfXIK245KrnxgKnqwOGF6cmO7lj9Ll4UW3Dg24I417y9dfxZmDmtKUgfiuprTAVXg543+jWBzgP1wM7oH1sR6c=[/tex][tex=9.214x1.357]zp+78a8/t+u7NJXZtFuw5ESVlwvtNl7hXp5FpcdbEMc=[/tex][tex=23.143x6.071]c77MlMo9Ziex57QmRsZyf7+JCW3dTV0SAZYiqF/tGk90hKbHb5MWBgXwasR3pjJv/ON3BqxN0S08vytYYipj9jul5vgx5PwHVVhmFgYwiHkIyj9YsHx2aQrM9+phrh3hqdC0okjE747s0DGp1HtQin2kUzDc70a3yTkpf/lA5p+n5WuhNrgbKvvBRIFtrjLuWdHhDz5ygY/OLs0Z7K4dGQKbEmlOEXZ3JbCErifAe7bpMwNpw1RlGjw+E3ZmxnCRnVavN0UTr85WWMpA50Z/g2jEbulw92OGRTAYnJQlQnUzxPIYDeUAeSSKzTn0O2AK02z7VFRQDpD/90VZUa7mwQZfM4cbcRpqdpaMvV0AzJWpJyUVJ/gEvcBdFQH/u5RLKNOC9al5lG/SplP4OayLdXgrhdb5FRXKXuOmANYIZQUUBukBS6pz2VUcIqsOSkw0iAXUr3m2io5WorAARkFNHazsABy4oNP8kiwe/q9o+zI=[/tex]值得注意 :电极电势实质上并不是电极双电层的电势差,而是相应电极与标 准氢电极组成的电池的电动势,因此,如上计算的 [tex=2.214x1.143]9H+L9E95sbjxXgLhaDwWy9ObbcqK/epdu6OPBer4PdE=[/tex] 也是该电池反应的标准 吉布斯函数的增量,而不是相应电极反应真正的 [tex=2.214x1.143]9H+L9E95sbjxXgLhaDwWy9ObbcqK/epdu6OPBer4PdE=[/tex] 。对此必须有清醒的认 识,否则,由此将会导出一系列诊误。另外要注意 :题目已给出氧电极的 [tex=4.929x1.357]+XOCX3dCmcD3ASKyTc1XnXRqPXUfl2YjFXfCVfQmpXQ=[/tex], 所以电极反应必须为 (2)式,若读者选择[tex=5.214x1.357]+XOCX3dCmcD3ASKyTc1XnXb8DvfvMdjGMvG3ma6aJDk=[/tex]则对应的电极反应应为 [tex=14.071x1.286]02+rzq2NtCMk6MQxGTIltjJxzl/rv6GMM1zsHMyK5+2wgPhi1KPOBIKuc1IR/fITCeJCVcfD8Zs4HPMBuR9vRZyHLZyuVfPECYShxuVCSEc=[/tex]显然 [tex=13.571x1.429]1l3wy7j4HQH6uBNJaXJDIRSfRmY9VM3/XtgbvL/Gx7TqGJvvutSxKeBJY454ndeS[/tex], 计算结果相同。氢电极和氧电极一样,在酸性溶液和碱性溶液中的标准电极电势不同 (相 差[tex=2.929x1.0]Q84R3afrMph8nLH+Erhzxw==[/tex] ), 其原因是选择了不同的标准态 [tex=5.0x1.5]pspdS/pNpr8GdyUvU/fWC0/IzVzn0yObPuTbypgeT34vomj7gF+oYnCdOCXAPmoD[/tex]或 [tex=5.929x1.5]f+kc9my8MSwR/cEzjvm7MNEN8pqNlzTkTpaNg56Ar+w=[/tex]但其电 极电势是相同的,因此:[tex=24.214x7.643]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[/tex]所以[tex=25.0x2.429]b9meoipPf6EAmW5Hzl/nzfyYwy7BrQ5H1DtkxGPOd1lhduawzrXWRuWhQ/OUkS92aKt2L84K0qhGNB2Idcr1i7L9dIa+g8ZZyczdeD5eo/UOD90oRZJAcyqs+sKLOTLXV/7p+hHLOQhMzPhQPVJNagZFIjuU6CPcIH4NZGEm7puthHPomQ4Ma8E/3PdbHj5rGPXM3zl6KbVRQ8SVORkL8L7Zd8/xlK09e/VK2JFX2Ck=[/tex]同理[tex=20.571x4.214]qeiYnKXLEhyhuGRg8yLtr3IIXI8j9ilnJYFAJZFoDyUvPwIyJxgOqUD2x1u8kRYbg3toMxkypIrZSgerqAo3CbQmHWpLo9NNbUfTLBHT60FPatf4L7eyWvpiMsZ3gl9wK7u2EiQqnFwPZGuH+8GEQcnb7qx5F9ERYeWnxWUYgYUxhiZteWcoN7JEM22n/iS75AnoRDRaYK8KyBsYalg6dIKd3JCEcfHIPbNe8P0VBjfB9IyxTlzVUVzurFLA5ELyhX7h5UGLBnt5zYv3QlOllupzyTP0NUy1rhB89laKimjD2XenZEYKcM7QrG952x9c[/tex]

举一反三

内容

0
【单选题】请用地点定桩法在4分钟内记忆数字。 4 0 1 3 6 3 5 1 9 8 8 9 7 2 9 3 0 9 5 3 1 7 7 5 2 3 3 0 5 0 1 4 1 3 8 3 5 7 9 7 (5.0分) A. 已背 B. 未背
1
6个顶点11条边的所有非同构的连通的简单非平面图有[tex=2.143x2.429]iP+B62/T05A6ZTM0eeaWiQ==[/tex]个，其中有[tex=2.143x2.429]ndZSw3zT0QTOVLVdoUto1Q==[/tex]个含子图[tex=1.786x1.286]J+vVZa2YaMpc6mJBbqVvWw==[/tex]，有[tex=2.143x2.429]lmhx48evnQMhi03NovPXig==[/tex]个含与[tex=1.214x1.214]kFXZ1uR8GjycbJx+Ts2kyQ==[/tex]同胚的子图。供选择的答案[tex=3.071x1.214]3KinXFh3SXhZ7nIe1y9KEV6aadxhhJWeEy6Dij1iObdMUZkY6ZA5J2dVVjPSuhEf[/tex]：(1) 1 ;(2) 2 ;(3) 3 ; (4) 4 ;(5) 5 ;(6) 6 ; (7) 7 ; (8) 8 。
2
已知 [tex=2.143x1.071]XPYuqyrB5+uDR4zwRjgs8A==[/tex] 时 [tex=21.429x1.571]lj2bMQqi5z3WNQ4id/iW/lQ7rbf6ZW7eGIAICZ6VdzecZUhUVtGwfUQXBZGth1o808F/bGt0ZtRrdi61oreZP9UjWbos8aNb/Y3qYVGVZK8yrq7tD9MWV/SWsHNiAY4Rks6+zYBgocQ3xcGnkJlCuQ==[/tex] 试计算 [tex=2.143x1.071]XPYuqyrB5+uDR4zwRjgs8A==[/tex] 时电极 [tex=3.429x1.214]XYLlL4CiD2h6q2Mxfi5Ucaviq9A1Xb/bnjubjpwTRmU=[/tex] 的标准电极电势 [tex=5.929x1.571]lj2bMQqi5z3WNQ4id/iW/iSwfukGcXUelxnuMw5c0h0cCTyl5315ZH5jgmXF6z9T[/tex]。
3
对 [tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]的不同值，分别求出循环群[tex=1.143x1.214]StMMJ6qThnpokZJIPGrdFyP3vrLnUdltYxmLxjw8za8=[/tex]的所有生成元和所有子群。(1) 7; (2) 8; (3)10 ;(4) 14 ; (5) 15 (6) 18 。
4
若要将一个长度为N=16的序列x(n)重新位倒序,作为某一FFT算法的输入,则位倒序后序列的样本序号为( )。 A: x(15), x(14), x(13), x(12), x(11), x(10), x(9), x(8), x(7), x(6),<br/>x(5), x(4), x(3), x(2), x(1), x(0) B: x(0), x(4), x(2), x(6), x(1), x(5), x(3), x(7), x(8), x(12), x(10),<br/>x(14), x(9), x(13), x(11), x(15) C: x(0), x(2), x(4), x(6), x(8), x(10), x(12), x(14), x(1), x(3), x(5),<br/>x(7), x(9), x(11), x(13), x(15) D: x(0), x(8), x(4), x(12), x(2), x(10), x(6), x(14), x(1), x(9), x(5),<br/>x(13), x(3), x(11), x(7), x(15)