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MODULE 5: Buffers and Neutralisation
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Total cards: 4•Content version: v4•Public deck•Updated: 8/1/2026
Card preview (4)
#1
Front (Question)
Buffer definition:
Back (Answer)
A solution that minimises the pH change when small amounts of acid or alkali are added
#2
Front (Question)
Components of a buffer solution:
Back (Answer)
Weak acid and its conjugate acid-base pairing, in order to remove any added OH- or H+ (equilibrium)
#3
Front (Question)
Action on a buffer solution when acid is added:
Back (Answer)
• H+ increases • Excess H+ reacts with A- (conjugate base pair) • Equilibrium shifts back to the left, so most of the added H+ ions get used
#4
Front (Question)
Action on a buffer solution when alkali is added:q
Back (Answer)
• OH- increases • Small volume of H+ reacts to form water (H2O) • Equilibrium shifts to the right to restore the volume of H+ ions