Which species in a NH₄Cl/NH₃ buffer reacts with acid?

I have a buffered solution containing 0.25M NH₃ (K_b=1.8 × 10³) and 0.40 M NH₄Cl. If 1.0 mol of HCl, strong acid, is added to 1.0 L of the buffered solution, Which chemical species of the buffer would tend to react with the HCl?
mfazekas80@hotmail.com

If you're adding an acid (HCl), the additional hydrogen ions will react with the base in the buffer (NH₃), producing more NH₄⁺.

Author: Fred Senese senese@antoine.frostburg.edu

Copyright © 1997-2005 by Fred Senese
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Last Revised 07/31/07.URL: http://antoine.frostburg.edu/chem/senese/101/acidbase/faq/nh4cl-nh3-buffer.shtml