Buffers (HSC SSCE Chemistry): Flashcards

Weak acid + conjugate base that resists pH changes

Equilibrium shifts via Le Chatelier's principle

Equal moles of weak acid and conjugate base

pH equals $\text{p}K_a$

Between $\frac{1}{10}$ and $10$

Bicarbonate ($\text{HCO}_3^-$) and carbonate ($\text{CO}_3^{2-}$)

$8.0-8.3$

$7.35-7.45$

$\text{H}_2\text{CO}_3$/$\text{HCO}_3^-$ system

Hydrogen carbonate ion ($\text{HCO}_3^-$)