Respuesta :
The pH of a buffer is calculated using Hendersen Hassalbalch's equation
pH = pKa + log [salt] / [acid]
thus ratio of concentration of conjugate base or species which can accept proton over a proton donor or conjugate acid describes the proportion of weak acid.
The solution of weak acid with its salt of strong base results into formation of a buffer, solution which resists change in pH on addition of small amount of strong acid or strong base
Answer:
The ratio of the concentration of a conjugate base over weak acid describes the proportions of a weak acid necessary to satisfy the Henderson-Hasselbalch equation.
Explanation:
The Henderson Hesselbach equation is given as:
[tex]pH=pK_a+\log \frac{[Salt]}{[Acid]}[/tex]
pH = potential of H
[tex]pK_a=-\log [K_a][/tex]
[tex]K_a[/tex] =Dissociation constant
[Salt] = Concentration of salt
[Acid] = Concentration of acid
Or it can also be represented as:
WeaK acid [tex]\rightleftharpoons H^+[/tex]+ Conjugate base
[tex]pH=pK_a+\log \frac{[\text{conjugate base}]}{[\text{weak acid}]}[/tex]
[conjugate base] = Concentration of conjugate base formed from the dissociation of weak acid.
[weak acid] = Concentration of weak acid.
