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jqz250

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[求助] 求水的离子积常数Kw(或pH)与温度的函数关系式和图像 已有1人参与

求助函数关系式和图像,并说明出处。求助各位大神。

@jiagle @崇明先生 @fds329 发自小木虫IOS客户端
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morningbear

至尊木虫 (著名写手)

【答案】应助回帖

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感谢参与,应助指数 +1
冰点降温: 金币+2, 谢谢回帖,欢迎常来无机物化版块。 2017-01-02 20:04:59
jqz250(冰点降温代发): 金币+20 2017-01-02 20:05:04
Bandura A V, Lvov S N. The Ionization Constant of Water over Wide Ranges of Temperature and Density. J. Phys. Chem. Ref. Data, 2006, 35(1), 15-30. DOI: 10.1063/1.1928231
Haynes W M. CRC Handbook of Chemistry and Physics, 97th. CRC Press, 2017, 5-69.

把数据复制到Excel里,会自动分列的。
我电脑没有flash,穿不了图了。

Values of pKw as a Function of Temperature and Pressure
p/MPa 0 °C 25 °C 50 °C 75 °C 100 °C 150 °C 200 °C 250 °C 300 °C 400 °C 600 °C 700 °C 800 °C
0.1a 14.946 13.995 13.264 12.696 12.252a 11.641a 11.310a 11.205a 11.339a 47.961 46.384 43.925 40.785
25 14.848 13.908 13.181 12.613 12.165 11.543 11.189 11.050 11.125 16.566 19.425 19.829 20.113
50 14.754 13.824 13.102 12.533 12.084 11.450 11.076 10.898 10.893 11.557 15.621 16.279 16.693
75 14.665 13.745 13.026 12.458 12.006 11.364 10.974 10.769 10.715 11.045 13.507 14.301 14.791
100 14.580 13.668 12.953 12.385 11.933 11.283 10.880 10.655 10.568 10.744 12.296 13.040 13.544
150 14.422 13.524 12.815 12.249 11.795 11.135 10.713 10.458 10.327 10.345 11.117 11.613 12.032
200 14.278 13.390 12.687 12.123 11.668 11.000 10.564 10.289 10.131 10.063 10.513 10.853 11.171
250 14.145 13.265 12.567 12.004 11.549 10.876 10.430 10.140 9.963 9.839 10.112 10.360 10.609
300 14.021 13.148 12.453 11.892 11.437 10.760 10.306 10.005 9.814 9.651 9.810 9.998 10.199
350 13.906 13.037 12.346 11.786 11.331 10.651 10.191 9.881 9.679 9.487 9.567 9.712 9.877
400 13.797 12.932 12.243 11.685 11.230 10.548 10.083 9.766 9.555 9.341 9.361 9.475 9.613
500 13.595 12.736 12.052 11.496 11.042 10.356 9.884 9.557 9.332 9.086 9.024 9.094 9.191
600 13.411 12.556 11.875 11.322 10.868 10.181 9.703 9.369 9.135 8.866 8.749 8.790 8.861
700 13.240 12.389 11.710 11.159 10.705 10.018 9.537 9.197 8.956 8.670 8.514 8.536 8.587
800 13.080 12.233 11.556 11.006 10.553 9.865 9.381 9.037 8.791 8.493 8.308 8.314 8.352
900 12.930 12.085 11.410 10.861 10.410 9.721 9.236 8.888 8.638 8.330 8.122 8.117 8.144
1000 12.788 11.946 11.272 10.725 10.273 9.585 9.098 8.748 8.495 8.178 7.952 7.939 7.957
a Note: Pressure for first row is 0.1 MPa at t < 100 °C and t ≥ 400 °C, or ps (saturated liquid) for 100 °C ≤ t ≤ 350 °C
2楼2017-01-01 12:01:13
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morningbear

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【答案】应助回帖

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冰点降温: 金币+1, 谢谢回帖,欢迎常来无机物化版块。 2017-01-02 20:05:11
jqz250(冰点降温代发): 金币+20 2017-01-02 20:05:16
实测数据往往没有函数关系式
如果有,也只是一个拟合结果。
3楼2017-01-01 15:04:52
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