Solution of 0.1 N NH₄OH and 0.1 N NH₄Cl has pH 9.25 . Then fine out pKb of NH₄OH

Solution Of 01 N Nhoh And 01 N Nhcl Has Chemistry QuestionSolution Of 01 N Nhoh And 01 N Nhcl Has Chemistry Question

Solution of 0.1 N NH₄OH and 0.1 N NH₄Cl has pH 9.25 . Then fine out pKb of NH₄OH

Options

(a) 9.25
(b) 4.75
(c) 3.75
(d) 8.25

Correct Answer:

4.75

Explanation:

Solution of 0.1 N NH₄OH and 0.1 N NH₄Cl is a buffer solution.
According to Henderson equation,
The pH of a basic buffer,
pH = 14 -pK(b) – log{C(salt)/C(base)}.
⇒pK(b) = 14-pH-log{C(salt)/C(base)},
⇒ pK(b) = 14-9.25-log{0.1/0.1}.
⇒ pK(b) = 14-9.25 = 4.75.
Therefore pK(b) of NH₄OH = 4.75.

AddThis Website Tools
admin:

Related Questions

  1. Peroxide effect can be checked by the addition of sufficient amount of
  2. The volume of 3.0 N-H₂O₂ strength is
  3. The IUPAC name of tertiary butyl chloride is
  4. Maximum bond angle at nitrogen is present in which of the following
  5. Which one of the following is a non-benzenoid aromatic compound