Buffer Solutions (OCR A-Level Chemistry A): Flashcards
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What buffer solutions resist
What buffer solutions resist
Changes in pH when small amounts of acid/base added
Two components of a buffer solution
Two components of a buffer solution
Weak acid (HA) and its conjugate base (A⁻)
Role of weak acid in buffer
Role of weak acid in buffer
Removes added alkali
Role of conjugate base in buffer
Role of conjugate base in buffer
Removes added acid
When buffer is most effective
When buffer is most effective
When equal concentrations of HA and A⁻ are present
pH of buffer when
pH of buffer when
Formula for in buffer
Formula for in buffer
Typical buffer operating pH range
Typical buffer operating pH range
About 2 pH units either side of
Two methods to prepare buffer
Two methods to prepare buffer
Weak acid + salt OR partial neutralization with alkali
When acid added to buffer, what happens
When acid added to buffer, what happens
reacts with , equilibrium shifts left