An organic acid has pKa = 8.95. What is its Ka value?

Question

Question

An organic acid has pK_a = 8.95. What is its K_a value? Where does the acid fit in Table 16.2?

Table 16.2 Ionization Constants for Some Acids and Their Conjugate Bases at 25°C?

chemistry

Answer 1

Answer #1

Given : pKa = 8.95

The relationship between the Ka and pKa is given by,

=> Ka = 10-pKa

Hence substituting the values, we get,

=> Ka = 10-8.95 = 1.122 X 10-9 approx.

Since the Ka value of the acid is more than that of boric acid. Hence the acid fits above the boric acid in the periodic table.

answered by: gavin

Answer 2

Similar Homework Help Questions

A certain organic acid has a Ka of 5.01 × 10−4. What is its pKa?

A certain organic acid has a Ka of 5.01 × 10−4. What is its pKa?
A certain organic acid has a Ka of 1.58 × 10−4. What is its pKa?

A certain organic acid has a Ka of 1.58 × 10−4. What is its pKa?
Hydrogen sulfide has a pKa of 7.05. If hydrocyanic acid has a pKa of 9.21 and...

Hydrogen sulfide has a pKa of 7.05. If hydrocyanic acid has a pKa of 9.21 and fluoroacetic acid has a pKa of 2.59, which one would act as a base in the presence of hydrogen sulfide instead of an acid? A. Does the acid react with the lower pKa or the base? B. Which of the two acids would act as a base in the presence of hydrogen sulfide and why? C. Of the three acids mentioned, which one would...

7. The p-fluorobenzoic acid (C6FH5CO2H) has a pka = 4.14 a) Compute the Ka value for...

7. The p-fluorobenzoic acid (C6FH5CO2H) has a pka = 4.14 a) Compute the Ka value for this acid. (4 points) b) Compute the Ko value for the conjugate base of this acid above and write out the equilibrium of the conjugate base. (6 points) c) Calculate the pH of a 0.0572 Molar sodium fluorobenzoate ( Na C6FH5CO2 )solution. Use the equilibrium in b to start this problem and the Kb from above. (8 points)
What is the pKa of an acid that has a Ka value of 7.38 x 10-7?...

What is the pKa of an acid that has a Ka value of 7.38 x 10-7? a. 6.13 b. 7.87 c. 6.63 d. 7
Please Explain: 7) a. Why does an acid and its conjugate base have the same pKa...

Please Explain: 7) a. Why does an acid and its conjugate base have the same pKa and Ka values? b. Why does a base and its conjugate acid have the same pKa and Ka values? Thank You! <3

You work in a chemistry lab, and are asked to prepare 500 mL of a buffer solution with pH-3.20, T...

You work in a chemistry lab, and are asked to prepare 500 mL of a buffer solution with pH-3.20, The weak acid solution concentration in this buffer should be 0.250 M and salt is a solid. The following steps walk you through a step by step process of this preparation. a. Choose the proper weak acids for the buffer solution Table 1. Ionization constant Ka for some weak acids Name Hydrofluoric acid Nitrous acid Fulminic acid Acetic acid Hypochlorous acid...
A certain acid has pKa = (7.997x10^0). What is the acid's Ka? (Ka, Kb, pKa, and...

A certain acid has pKa = (7.997x10^0). What is the acid's Ka? (Ka, Kb, pKa, and pKb are unitless quantities.)
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and...

Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and react with water to produce hydronium ions or hydroxide ions that contribute to the pH of the salt solution. Since strong acids and strong bases completely ionize in solution, the reverse reaction essentially does not occur, meaning that the resulting conjugate base of a strong acid or conjugate acid of a strong base do NOT act as acids or bases. Ions that are conjugate...

A 0.0290 M solution of an organic acid has an [H'] of 0.00145 M. What is...

A 0.0290 M solution of an organic acid has an [H'] of 0.00145 M. What is the pH of the solution, the percent ionization of the acid, and its Ka value? H= Number percent ionization Number K = Number