37) If the value of POH for weak acid equal 10 and its equilibrium constant Ka= 5.1x104, So the degree of ionization of the acid equals
Question
- If the value of POH for weak acid equal 10 and its equilibrium constant Ka= 5.1x104, So the degree of ionization of the acid equals
Solution
To find the degree of ionization of the acid, we first need to find the concentration of the acid and the concentration of the hydronium ion.
-
The pOH is given as 10. The pH can be found using the equation pH + pOH = 14. So, pH = 14 - 10 = 4.
-
The concentration of hydronium ion [H+] can be found using the equation pH = -log[H+]. So, [H+] = 10^-pH = 10^-4 M.
-
The equilibrium constant Ka is given as 5.1x10^4. The equation for Ka is Ka = [H+][A-]/[HA]. Since the acid is weak, we can assume that [HA] is approximately equal to the initial concentration of the acid, and that [H+] is equal to [A-]. So, [HA] = Ka / [H+]^2 = 5.1x10^4 / (10^-4)^2 = 5.1x10^4 / 10^-8 = 5.1x10^12 M.
-
The degree of ionization α can be found using the equation α = [H+] / [HA] = 10^-4 / 5.1x10^12 = 1.96x10^-17.
So, the degree of ionization of the acid is approximately 1.96x10^-17.
Similar Questions
2. Calculate the Ka for a 0.50M weak acid solution that has a pH equal to 4.15.2.33 x 10-93.21 x 10-71.00 x 10-87.59 x 10-8
Which of the following Ka values represents the weakest acid?A.Ka = 1.82 10−1B.Ka = 1.29 10−4C.Ka = 1.62 10−12D.Ka = 3.24 10−7
1.0 mole of a weak acid HA was dissolved in 2.0 L of solution. After the system had come to equilibrium, the concentration of HA was found to be 0.34 M. Calculate Ka for HA.
An unknown weak acid with a concentration of 0.097 M has a pH of 1.80. What is the Ka of the weak acid?
Which is pH?Multiple choice question.the value of the equilibrium constant expression for the ionization of a weak acidthe negative logarithm of the hydroxide ion concentration of a solutionthe negative logarithm of the hydrogen ion concentration of a solutionthe value of the equilibrium constant expression for the ionization of a base
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.