Please explain the mechanism of acidic buffer with an example.
Answers
Hi there,,
☆ Acidic buffer as sodium acetate and acetic acid both dissociate in water as the following equations
●CH3COOH => CH3COO- + H3O+
●CH3COONa=> CH3COO- + Na+
☆By adding a small amount of acid
●HCl => H3O + Cl
which increases the concentation of hydronium cation in solution , the equilibrium is broken so the reaction of acetic acid ionization go backward to form acetic acid
●CH3COO + H3O=>CH3COOH + H2O
◇ so, most of hydonium cations which added by the acid is decrease into the minimum , so pH value remain constant
☆ By adding a small amount of base
●NaOH => Na+ + OH-
The hydroxide cocentration increases so, the equilibrium broken again and the the hydroxide linked with the hydronium to form water
●H3O+ OH=> 2H2O
◇ So, most hydroxide anions are decreased into minimum and the pH value remain constant
♡ Hope the answer is helpful
Plz mark it as brainliest