Dissociation

Dissociation - respect to weak acids and weak bases....

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Dissociation Degree of dissociation It is a fraction of the total number of moles of an acid or base or electrolyte that dissociates into ions in an aqueous solution when equilibrium is reached. It is represented by α Thus, greater the degree of dissociation ( α ) stronger the acids or bases and vice versa. Dissociation constants Strong acids and strong bases dissociate in a solution almost completely. Hence the dissociation studies are important only with
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Unformatted text preview: respect to weak acids and weak bases. Dissociation of weak acids : Consider a weak acid HA which dissociates in water as HA + H 2 O H 3 O + + A-For simplicity it can be written as HA H + + A-Applying the law of mass action Where K a is known as acid ionization constant (or acid constant). Higher the value of K a greater the degree of dissociation. Acid with high K a value are relatively stronger than acid with lower K a value....
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This note was uploaded on 07/31/2011 for the course CHEM 102 taught by Professor Henshaw during the Spring '08 term at VCU.

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Dissociation - respect to weak acids and weak bases....

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