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huzi

金虫 (小有名气)

[求助] 表面电位的推导 已有1人参与

The magnitude and sign of the surface potential, which determines the extent of adsorption and in turn flotation, are dependent upon the concentration of Na+, and pH of solution and will be determined on the basis of the reaction:
3Si + Na+ + Al(OH)3 + 5H2O == NaAlSi3O8 + 13H+ + 12e-  (4)
Accordingly, utilizing the Gibbbs’ free energy values in kJ/mol (Standard Potentials in Aqueous Solutions,1985) (NaAlSi3O8 = -3711.1, Na+ = -261.87, Al(OH)3 = -1154.9, H2O = -237.18) the potential values resulted in the following equations for albite (EA):
EA = - 0.978 - 13/12*0.059 pH - 1/12*0.059 log [Na+]          (5)

求教(4)-(5)的详细过程,谢谢!
表面电位的推导

[ Last edited by sddtc888 on 2013-12-19 at 17:44 ]
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gd494534

金虫 (正式写手)

【答案】应助回帖

感谢参与,应助指数 +1
好久没练手呢,看到你的帖子,所以刚才就把详细答案写在纸上,现在传给你,希望对你有所帮助!
表面电位的推导-1
2013-12-20 203833.jpg

Think big、think different。。。
2楼2013-12-20 20:48:32
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gd494534

金虫 (正式写手)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
huzi: 金币+20, ★★★很有帮助, 谢谢 2013-12-20 21:12:26
把图片调整一下吧
表面电位的推导-2
2013-12-20 203833.jpg

Think big、think different。。。
3楼2013-12-20 20:52:48
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