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August 30, 2015

Homework Help: chemistry

Posted by Vanessa on Friday, March 19, 2010 at 7:41pm.

Will this solution form a buffer?
100 mL of .10 M NH3; 100 mL of .15 M NH4Cl

Work:
NH3= .01 moles
NH4Cl= .015 moles
.... not sure what else to do.

I think we use the H-H equation, but I don't know how to find pKa, or even what pKa is. This should give the pH of the solution, but I don't think the pH would indicate whether or not this solution would be a buffer? How do you know if a solution is a buffer, and how do you know if the solution is not a buffer?

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