Question

The ratio of the concentration of a(n) ________ over ________ describes the proportions of a weak acid necessary to satisfy the henderson-hasselbalch equation.

Answer 1

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.

Step-by-step explanation:

The Henderson Hesselbach equation is given as:

`pH=pK_a+\log ([Salt])/([Acid])`

pH = potential of H

`pK_a=-\log [K_a]`

`K_a` =Dissociation constant

[Salt] = Concentration of salt

[Acid] = Concentration of acid

Or it can also be represented as:

WeaK acid
`\rightleftharpoons H^+`+ Conjugate base

`pH=pK_a+\log \frac{[\text{conjugate base}]}{[\text{weak acid}]}`

[conjugate base] = Concentration of conjugate base formed from the dissociation of weak acid.

[weak acid] = Concentration of weak acid.

Answer 2

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