Describe how a buffer solution based on hydrochloric acid can act as a buffer. (5)
HCl ⇌ H++ Cl- (1)Added alkali: H+ reacts with added alkali/OH- (1) Equilibrium shifts right forming Cl- or H+ (1) Added acid: Cl- reacts with added acid/H+ (1) Equilibrium shifts left forming HCl (1)
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