How do buffers reduce changes in pH when hydrogen ions or hydroxide ions are added to a solution?

The buffer solution is mainly a weak acid and it's salt

CH3COOH %26amp; CH3COONa



when OH ions are added it reacts with the dissociated NA+ ions to form NaOH ,or H ions to form water



when h ions are added , it reacts with The CH3COO- to form CH3COOH



so there is less change in phHow do buffers reduce changes in pH when hydrogen ions or hydroxide ions are added to a solution?
The buffer solutions shift the chemical equilibrium and there is a little change in pH due to common ion effect. If we will add hydrogen ion it will change to lower pH and vice versa. But very little effect

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