The pKb for a generic amine(R-NH2)) in aqueous solution is 6.30. What is its pKa?

Question

Question

The pK_b for a generic amine(R-NH₂)) in aqueous solution is 6.30. What is its pK_a?

science chemistry

Answer 1

Answer #1

we have a relation between pKa and pKb

pKb + pKa = 14

pKa = 14 - pKb

pKa = 14 - 6.30

pKa = 7.70

Answer 2

Similar Homework Help Questions

You have an acid with pKa=4.037. What is the pKb of its conjugate base? (pKa and...

You have an acid with pKa=4.037. What is the pKb of its conjugate base? (pKa and pKb are unitless quantities)
Chapter 16 Relating pKa and pKb Review I Constants | Periodic Table Ar Learning Goal: To understa...

Chapter 16 Relating pKa and pKb Review I Constants | Periodic Table Ar Learning Goal: To understand the relation between the strength of an acid or a base and its pKa and pKb values. The degree to which a weak acid dissociates in solution is given by its acid-ionization constant, Ka. For the generic weak acid, HA, HA(aq) A (aq) H (aq) and the acid-ionization constant is given by a HA Similarly, the degree to which a weak base reacts...
What is the pH of the resultant solution if the pKa of an amine is 7.4...

What is the pH of the resultant solution if the pKa of an amine is 7.4 and the ratio of nonionized to ionized species is 10:1?

If you set the pH of an aqueous solution of an acid to its pKa, what...

If you set the pH of an aqueous solution of an acid to its pKa, what are the relative amounts of the acid and its conjugate base present in the solution? Explain.
Consider a weak base that has a pKb of 4.2. • What is the pKa of...

Consider a weak base that has a pKb of 4.2. • What is the pKa of this solution? • What is the pH of a 0.2 M solution of this base? • If you were to mix 50 mL of the 0.2 M base with 50 mL of a 0.1 M solution of its conjugate acid, what would the pH of this buffer be, and what is its effective buffering range?
Diethylamine ((C2H5)2NH) is a weak base. In aqueous solution at 25°C, it reacts with water to...

Diethylamine ((C2H5)2NH) is a weak base. In aqueous solution at 25°C, it reacts with water to produce its conjugate acid, the diethylammonium ion ((C2H5)2NH2+), and the hydroxide ion (OH −). (a) If the base-dissociation constant (Kb) of diethylamine is 7.0 ✕ 10−4, calculate the acid-dissociation constant (Ka) for the conjugate acid. (b) What are the corresponding pKa and pKb values for this conjugate acid-base pair? pKa pKb

Consider two amines and identify which is the stronger base in aqueous solution. NH2 NH2 vs....

Consider two amines and identify which is the stronger base in aqueous solution. NH2 NH2 vs. Select the correct statement. Aniline is the stronger base in aqueous solution. They have equal strengths as bases in aqueous solution. O Cyclohexanamine is the stronger base in aqueous solution.
At 25 °C, an aqueous solution has an equilibrium concentration of 0.00155 M for a generic...

At 25 °C, an aqueous solution has an equilibrium concentration of 0.00155 M for a generic cation, A+(aq), and 0.00155 M for a generic anion, B−(aq). What is the equilibrium constant, Ksp, of the generic salt AB(s)? At 25 °C, an aqueous solution has an equilibrium concentration of 0.00215 M for a generic cation, A+(aq), and 0.00108 M for a generic anion, B2−(aq). What is the equilibrium constant, Ksp, of the generic salt A2B(s)?
Consider an aqueous solution comprised of 0.150 M NH3 and 0.200 M NH4Cl. The pKb of...

Consider an aqueous solution comprised of 0.150 M NH3 and 0.200 M NH4Cl. The pKb of NH3 is 4.75 and the volume of the solution is 1.00 L. a) What is the pH of this solution? Show your work. b) What is the chemical reaction (balanced chemical equation) that occurs when NaOH solution is added to the original solution? c) How many moles of NaOH(s) could this solution react with before its pH rises to 10.00? Show your work.

3) a) What is the pKb for a weak base if the pH of a 0.125M solution of this weak base was found to be 8.16?

3) a) What is the pKb for a weak base if the pH of a 0.125M solution of this weak base was found to be 8.16? 4) When a weak acid is added to water to make a 0.250M solution, the acid was found to be 1.5% ionized. What is the Ka and pKa of this weak acid? 5) At 60°C, Kw = 9.6x10-14 (Kw increases as the temperature increases). a) For pure water at 60°C, what is the [H+] and pH....