Chemistry · Acids, Bases and Salts
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A buffer solution is that which resists/minimizes the change in:
- A
pOH
- B
pH
- C
pKa
- D
pKb
A buffer solution is a solution that can resist a change in pH upon addition of an acidic or basic component. It contains a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer solution minimizes changes in pH because the weak acid or base reacts with any added acid or base, respectively, to maintain the solution's pH within a relatively narrow range. The buffer solution can only resist a change in pH within a certain range, known as the buffer capacity.
A buffer resists changes in pH, not pOH. It consists of a weak acid and its conjugate base, controlling H+ ions, not OH- ions.
A buffer solution is a solution that can resist a change in pH upon addition of an acidic or basic component. It contains a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer solution minimizes changes in pH because the weak acid or base reacts with any added acid or base, respectively, to maintain the solution's pH within a relatively narrow range. The buffer solution can only resist a change in pH within a certain range, known as the buffer capacity.
A buffer stabilizes pH, not pKa. pKa indicates acid strength, while a buffer's purpose is pH stabilization using weak acid-base pairs.
A buffer system regulates pH, not pKb. Buffer maintains pH through the equilibrium of weak acids and bases, not their dissociation constants.
Tagged under Chemistry · Acids, Bases and Salts · 2012