Chapter 17 Outline

Chapter 17 Outline - Joseph Chapter 17: ADDITIONAL ASPECTS...

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Joseph Chapter 17: ADDITIONAL ASPECTS OF AQUEOUS EQUILIBRIA Metal ions or salts containing a conjugate weak acid or base can shift the pH of a solution. • If we add a conjugate acid (base) to a solution of a weak base (acid), the pH will shift. This is called the common ion effect. A common ion will shift a chemical equilibrium in such a direction as to get rid of some of the added ion. A particularly important type of acid-base mixture is that of a weak conjugate acid-base pair. Such mixtures function as buffered solutions (buffers). Addition of small amounts of a strong acid or a strong base to a buffered solution causes only small changes in pH beca use the buffer reacts with the added acid or base. (Strong acid-strong base, strong acid-weak base, and weak acid-strong base reactions proceed essentially to completion.) Buffered solutions are usually prepared from a weak acid and a salt of that acid or from a weak base and a salt of that base. Two
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Chapter 17 Outline - Joseph Chapter 17: ADDITIONAL ASPECTS...

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