Solution Found!
Ammonia appears in Table 1-5 both as an acid and as a
Chapter 1, Problem 14P(choose chapter or problem)
Ammonia appears in Table 1-5 both as an acid and as a conjugate base.
(a) Explain how ammonia can act as both an acid and a base. Which of these roles does it commonly fill in aqueous solutions?
(b) Show how water can serve as both an acid and a base.
(c) Calculate \(K_{a} \text { and } p K_{a}\) for the hydronium ion,
\(\mathrm{H}_{3} \mathrm{O}^{+}\).
(d) Show how methanol \(\left(\mathrm{CH}_{3} \mathrm{OH}\right)\) can serve as both an acid and a base. Write an equation for the reaction of methanol with sulfuric acid.
Equation Transcription:
Text Transcription:
Ka and pKa
H3O+
(CH3OH)
Questions & Answers
QUESTION:
Ammonia appears in Table 1-5 both as an acid and as a conjugate base.
(a) Explain how ammonia can act as both an acid and a base. Which of these roles does it commonly fill in aqueous solutions?
(b) Show how water can serve as both an acid and a base.
(c) Calculate \(K_{a} \text { and } p K_{a}\) for the hydronium ion,
\(\mathrm{H}_{3} \mathrm{O}^{+}\).
(d) Show how methanol \(\left(\mathrm{CH}_{3} \mathrm{OH}\right)\) can serve as both an acid and a base. Write an equation for the reaction of methanol with sulfuric acid.
Equation Transcription:
Text Transcription:
Ka and pKa
H3O+
(CH3OH)
ANSWER:
Answer :
Step 1:
An acid is any species that can donate a proton .
Ammonia has a proton bonded to nitrogen ,so ammonia can be a weak acid .A base is a proton acceptor ,that is it must have a pair of electrons to share with a proton .
Any atom with an unshared electron pair can be a base ,the nitrogen in ammonia has an unshared electron pair so ammonia is basic .
In water ammonia is too weak acid to give up its proton,it acts as a base and pulls a proton from water to a small extent.