1Chapter 14 - Aqueous Equilibria: Acids & BasesAcid-Base Concepts•Acids and bases are all around us. They make up one of the most important (and practical) aspects of chemistry.•What are some examples of each? •What do you know about acids and bases?Acid-Base Concepts•CHM 151 taught Arrhenius theoryAcids produce hydrogen ions in waterHA (aq) 'H+(aq) + A-(aq)Bases produce hydroxide ions in waterMOH (aq) 'M+(aq) + OH-(aq)•Now Brønsted-Lowry theoryAcid: Substance that can donate H+Base: Substance that can accept H+
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2Acid-Base Pairs•Which substance donates H+?•Which substance accepts H+?•Conjugate acid-base pairs. Remember that reactions proceed in both directions.Acid-Base Pairs•Write an equation for the dissociation of HCN in water. Identify the acid, the base, the conjugate acid, and the conjugate base.Acid-Base Pairs•Identify acid-base pairs in the reaction of HS-with HF.