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### Topic: activity coefficient,ph  (Read 4953 times)

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#### Nathan001

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##### activity coefficient,ph
« on: April 20, 2008, 10:17:08 AM »

Calculate the activity coefficient of a 0.75M solution of NaCl using the Debye-Huckel limiting law.  A = 0.509

A freighter carrying drums of NH4OH is wrecked. In order to assess the effect of this upon the marine life, you need to ascertain the pH of the solution in the drums. The drums contain a 0.05M solution of the weak salt and only 0.2% of the molecules are dissociated. What is the pH?

NH4OH ===> NH4+ + OH

thank you so much!

#### AWK

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##### Re: activity coefficient,ph
« Reply #1 on: April 21, 2008, 01:03:02 AM »
Debye-Huckel limiting law is valid up to I at least not greater than 0,1.
You should use a more advanced equation
AWK