Respuesta :
Salicylic acid (C7H6O3) is a monoprotic acid with pKa = 2.97. Let us represent it by general formula HA. The dissociation equilibrium is:
HA ↔H+ + A-
where HA = protonated form
A- = deprotonated form
The pH of stomach = 2.0
Based on Henderson-Hasselbalch equation:
pH = pka + log[A-]/[HA]
(or) [A-]/[HA] = [tex]10^{pH-pKa} = 10^{2.0 -2.97 } = 10^{-0.97} = 0.1072[/tex]
[A-] = 0.1072 [HA]
In order to find the percentages, let us assume that
[A-] + [HA] = 100
0.1072[HA] + [HA] = 100
HA = 90.32%
A- = 0.1072 * [HA] = 0.1072*90.32 = 9.68%
The study of chemicals and bonds is called chemistry. There are two types of solution on the basis of its Ph concentration and these are dilute and concentrated.
The correct answer is 9.68%.
What is ph?
- "potential of hydrogen" is a scale used to specify the acidity or basicity of an aqueous solution.
- Acidic solutions (solutions with higher concentrations of H+ ions) are measured to have lower pH values than basic or alkaline solutions.
Salicylic acid (C7H6O3) is a monoprotic acid with pKa = 2.97. Let us represent it by the general formula HA.
The dissociation equilibrium is:
[tex]HA <----->H^+ + A^-[/tex]
where
- HA = protonated form
- A- = deprotonated form
The pH of stomach = 2.0, Based on the Henderson-Hasselbalch equation:
[tex]pH = pka + log\frac{[A-]}{[HA]}[/tex]
[A-] [tex]10^{(2.0)-(2.97)}[/tex] [tex]10^{-0.97}\\[/tex] = 0.1072 [HA], In order to find the percentages, let us assume that
[A-] + [HA] = 100
0.1072[HA] + [HA] = 100
HA = 90.32%
A- = [tex]0.1072 * [HA] = 0.1072*90.32 = 9.68%[/tex]
Hence, the correct answer is 9.68%.
For more information about ph, refer to the link:-
https://brainly.com/question/2681336
