Worksheet 20

Worksheet 20 - Worksheet 20 - Acids and Bases The...

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Worksheet 20 - Acids and Bases The Brønsted-Lowry definition of an acid is a substance capable of donating a proton (H + ), and a base is a substance capable of accepting a proton . For example, the weak acid, HF , can be dissolved in water, giving the reaction: HF (aq) + H 2 O (l) ' H 3 O + (aq) + F - (aq) acid conjugate base base conjugate acid In this reaction, HF is the species losing the proton (H + ), making it the acid . Water is the species accepting the proton, to form the hydronium ion , H 3 O + , making it the base. The F - (aq) is called the conjugate base of HF. It can gain a proton in the reverse reaction. H 3 O + is the conjugate acid of H 2 O, since it can lose a proton in the reverse reaction. The stronger an acid, the weaker its conjugate base will be and the stronger the base, the weaker its conjugate acid. The equilibrium concentrations of these species will be determined by the relative strengths of the acids and bases. The strongest acid will dissociate to the greatest extent. H
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This note was uploaded on 12/05/2011 for the course CHEM 231 taught by Professor Beck during the Spring '11 term at Indiana.

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Worksheet 20 - Worksheet 20 - Acids and Bases The...

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