Question
In: Chemistry
What is the pH of 0.51 M diethylammonium bromide, (C2H5)2NH2Br. The Kb of diethylamine, (C2H5)2NH, is...
What is the pH of 0.51 M diethylammonium bromide,
(C2H5)2NH2Br.
The Kb of diethylamine,
(C2H5)2NH, is 6.9 x
10-4.
Solutions
Expert Solution
(C2H5)2NH2Br it is a salt of strong acid and weak base. so cation participate in the reaction
(C2H5)2NH2+ + H2O ---------------------> (C2H5)2NH2 + H3O+
0.51 0 0
0.51 - x x x
Ka = Kw / Kb = 1.0 x 10^-14 / 6.9 x 10-4. = 1.45 x 10^-11
Ka = [ (C2H5)2NH2 ][H3O+] / [(C2H5)2NH2+ ]
1.45 x 10^-11 = x^2 / 0.51 - x
x = 2.71 x 10^-6
[H3O+] = x = 2.71 x 10^-6 M
pH = -log[H3O+]
= -log (2.71 x 10^-6)
= 5.57
pH = 5.57
queen_honey_blossom answered 1 year agoRelated Solutions
Determine the pH during the titration of 38.2 mL of 0.207 M diethylamine ((C2H5)2NH, Kb =...
Determine the pH during the titration of 38.2
mL of 0.207 M diethylamine
((C2H5)2NH,
Kb = 6.9×10-4) by
0.207 M HNO3 at the
following points. (Assume the titration is done at 25 °C.)
Note that state symbols are not shown for species in this
problem.
(a) Before the addition of any
HNO3 _______
(b) After the addition of 14.6 mL
of HNO3 ______
(c) At the titration midpoint ________
(d) At the equivalence point _______
(e) After adding 59.2 mL...
A) Kb=6.9×10-4 for diethylamine A 26.8 mL sample of 0.330 M diethylamine, (C2H5)2NH, is titrated with...
A)
Kb=6.9×10-4 for diethylamine
A 26.8 mL sample of 0.330 M
diethylamine,
(C2H5)2NH, is
titrated with 0.333 M hydrobromic
acid.
The pH before the addition of any hydrobromic acid
is ___ .
B)
Kb=6.3×10-5 for trimethylamine
A 22.2 mL sample of 0.275 M
trimethylamine,
(CH3)3N, is titrated with
0.293 M nitric acid.
At the equivalence point, the pH is ___.
C)
Kb=5.9×10-4 for dimethylamine
A 25.9 mL sample of 0.239 M
dimethylamine,
(CH3)2NH, is titrated with
0.213 M hydroiodic acid....
A 29.6 mL sample of 0.260 M diethylamine, (C2H5)2NH, is titrated with 0.338 M hydrochloric acid....
A 29.6 mL sample of 0.260 M
diethylamine,
(C2H5)2NH, is
titrated with 0.338 M hydrochloric
acid.
After adding 33.7 mL of hydrochloric
acid, the pH is
.
Use the Tables link in the References for any
equilibrium constants that are required.
The next problems deal with the titration of 75 mL of 1.55 M diethylamine, (CH3CH2)2NH (Kb...
The next problems deal with the titration of 75 mL of 1.55 M
diethylamine, (CH3CH2)2NH (Kb = 1.3 x 10-3) with 0.25 M HCl. Water
will be a major species throughout the titration. The chemical
species, in addition to water, that can be found in this reaction
mixture during the titration are:
I. H+ II. OH- III. Cl- IV. (CH3CH2)2NH V. (CH3CH2)2NH2+
a)What is the pH of the solution at the equivalence point?
b) How many mL of HCl will...
What is the pH of a 0.608 M solution of ammonium bromide? The Kb value for...
What is the pH of a 0.608 M solution of ammonium bromide? The Kb
value for ammonia is 1.8 x 10–5.
Consider the titration of 65 mL of 1.75 M diethylamine, (CH3CH2)2NH (Kb = 1.3×10-3) with 0.25...
Consider the titration of 65 mL of 1.75 M diethylamine,
(CH3CH2)2NH (Kb = 1.3×10-3) with 0.25 M HCl. How many mL of HCl
will need to be added to the diethylamine solution to reach a pH of
11.11?
Consider the titration of 65 mL of 1.75 M diethylamine, (CH3CH2)2NH (Kb = 1.3×10-3) with 0.25...
Consider the titration of 65 mL of 1.75 M diethylamine,
(CH3CH2)2NH (Kb = 1.3×10-3) with 0.25 M HCl. How many mL of HCl
will need to be added to the diethylamine solution to reach a pH of
11.11?
The answer is NOT 455 mL or 45.5 mL
A 3.452 M solution of triethylamine ((C2H5)3N, Kb= 4e-4) has a pH of 12.57. What is...
A 3.452 M solution of triethylamine ((C2H5)3N, Kb= 4e-4) has a
pH of 12.57. What is the percent ionization of this solution?
Determine the pH during the titration of 34.9 mL of 0.331 M triethylamine ((C2H5)3N , Kb...
Determine the pH during the titration of 34.9
mL of 0.331 M triethylamine
((C2H5)3N ,
Kb = 5.2×10-4) by
0.331 M HNO3 at the
following points.
(a) Before the addition of any HNO3.
_________
(b) After the addition of 13.6 mL
of HNO3
_____
(c) At the titration midpoint ______
(d) At the equivalence point _______
(e) After adding 52.0 mL of
HNO3 ________
Determine the pH during the titration of 33.7 mL of 0.345 M triethylamine ((C2H5)3N, Kb =...
Determine the pH during the titration of 33.7
mL of 0.345 M triethylamine
((C2H5)3N,
Kb = 5.2×10-4) by
0.345 M HI at the following
points. (Assume the titration is done at 25 °C.)
Note that state symbols are not shown for species in this
problem.
(a) Before the addition of any
HI
(b) After the addition of 15.0 mL
of HI
(c) At the titration midpoint
(d) At the equivalence point
(e) After adding 51.9 mL of
HI
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- This is all one question, thank you so much in advance! You must evaluate a proposal...
- X Company is considering the purchase of a new processor that costs $200,000. Shipping and setup...
- There are a large number of tasks involved in information technology and programming, and many of...
- Using one quantitative and one qualitative health policy research method described in this chapter, design a...
- What is the Rawls' solution to the age-old question of social (economic / distributive) justice?...
- St. Johns River Shipyards' welding machine is 15 years old, fully depreciated, and has no salvage...
- The following information is available for Robstown Corporation for 20Y8: Inventories January 1 December 31 Materials...
ADVERTISEMENT