3/16/2024 0 Comments Buffer 1 t.s logicworks 5Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications. It is used to prevent any change in the pH of a solution, regardless of solute. A buffer’s pH changes very little when a small amount of strong acid or base is added to it. pKa: A quantitative measure of the strength of an acid in solution a weak acid has a pKa value in the approximate range −2 to 12 in water and a strong acid has a pKa value of less than about −2.Ī buffer is an aqueous solution containing a weak acid and its conjugate base or a weak base and its conjugate acid.equilibrium: The state of a reaction in which the rates of the forward (reactant to product) and reverse (product to reactant) reactions are the same.Buffers can be prepared in multiple ways by creating a solution of an acid and its conjugate base.Buffer solutions are necessary in biology for keeping the correct pH for proteins to work.When some strong acid is added to a buffer, the equilibrium is shifted to the left, and the hydrogen ion concentration increases by less than expected for the amount of strong acid added.Buffer solutions are resistant to pH change because of the presence of an equilibrium between the acid (HA) and its conjugate base (A-).
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