When acid is added to a buffer solution composed of a weak base B and its salt with strong acid, then the reaction that occurs to maintain the pH is
Correct answer: A. B + H3O+→ BH+ + H2O
- A. B + H3O+→ BH+ + H2O
- B. B + H2O → BH+ + OH-
- C. OH- + BH+→ B + H2O
- D. BH+ + H2O → B + H3O+
Explanation
Base reacts with added acid to minimize the stress of adding acid.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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