C21 Buffers And Neutralisation Flashcards

1
Q

What does the pH of a buffer depend on?

A

pKa of weak acid

Ratio of conc of weak acid and its conjugate base

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2
Q

Define buffer solution

A

Mixture of weak acid and its conjugate base which minimises changes in pH when small quantities of acid or alkali are added.

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3
Q

What does a buffer contain?

A

Weak acid and conjugate base

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4
Q

Define conjugate acid-base pair

A

Contains 2 species that can be interconverted by the transfer of a proton

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5
Q

When is a buffer most effective?

A

[HA] = [A-]

pH of buffer solution = pKa of HA

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6
Q

How can a buffer be prepared?

A

Mixing weka acid with solution of its salt

Partially neutralising solution of weak acid

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