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April 26, 2024, 09:48:13 am
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Author Topic: pH questions (1st year)  (Read 3516 times)  Share 

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Cuddlekins

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pH questions (1st year)
« on: May 09, 2011, 08:52:00 pm »
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Calculate the pH of:
0.100M sodium propanoate (NaC3H5O2)

so far i have x^2/ 0.1-x = kb, where do we find the kb value of sodium propanoate? i looked at the appendix of my txtbook and there was no value for this

thanks
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Bachelor of Science @ UoM

Cuddlekins

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Re: pH questions (1st year)
« Reply #1 on: May 09, 2011, 09:17:44 pm »
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Just solved the below question XD
Another q:
[H+]= 0.020+x approximately =0.020M ;pH=1.70 ; assumption good (x or [H+]=6.5* 10^-5<<<0.020)

How do we know is the assumption is good or not, where is the x=6.5* 10^-5 from?

thanks
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Bachelor of Science @ UoM
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