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Buffers
Buffers - Certain solutions, such as that of ammonium acetate, have a tendency to resist any change in its hydronium ion concentration or pH, whenever a small amount of a strong acid or a strong base is added to it. This property of a solution is known as buffer acti..
Buffers
Certain solutions, such as that of ammonium acetate, have a tendency to resist any change in its hydronium ion concentration or pH, whenever a small amount of a strong acid or a strong base is added to it. This property of a solution is known as buffer actio..
Applications of Buffers
Buffers find extensive applications in a variety of field..
Basic buffer
A buffer solution containing relatively large amounts of a weak base and its salt with a strong acid, is termed as a basic buffer. Such buffers have pH on the alkaline side i.e., pH is higher than 7 at 298 K. The pH of a basic buffer is given by the equation..
A buffer solution containing relatively large amounts of a weak base and its salt with a strong acid, is termed as a basic buffer. Such buffers have pH on the alkaline side i.e., pH is higher than 7 at 298 K. The pH of a basic buffer is given by the equation..Buffer-capacity and Buffer-range
The effectiveness of any buffer is described in terms of its buffer capacity. It is defined as, 'the number of equivalents of a strong acid (or a strong base) required to change the pH of one litre of a buffer solution by one unit, keeping the total amount of the acid..
Mechanism of Buffer Action
The buffering action of buffer solutions can be explained in terms of the Bronsted-Lowry concept of acids and bases as follow..
Action of basic buffer
A basic buffer contains a weak base (BOH), and its salt with strong acid (BX). The buffer solution thus contains large amounts of the weak base BOH, and the cation B + (coming from the dissociation of the salt BX), in addition to H 3 O + and OH - . The addition of an acid or ..
A basic buffer contains a weak base (BOH), and its salt with strong acid (BX). The buffer solution thus contains large amounts of the weak base BOH, and the cation B + (coming from the dissociation of the salt BX), in addition to H 3 O + and OH - . The addition of an acid or ..Maintenance of pH
The proteins act as buffers in regulating the acid and base concentration in bloo..
Boric acid in Powders
Boric acid being a germicide and a buffering agent is often added to powders. However, it is not advisable to use powders containing boric acid for babie..
In biochemical systems
pH plays a very significant role in biochemical reactions. For example, the blood in our bodies is buffered at a pH value of 7.36-7.42 due to bicarbonate - carbonic acid buffer. A mere change of 0.2 pH units can cause death. Certain enzymes get activated only at certain definit..
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