Determine the pH during the titration of 35.8 mL of 0.233 M
methylamine (CH3NH2 , Kb = 4.2×10-4) by 0.233 M HBr at the
following points.
(a) Before the addition of any HBr
(b) After the addition of 13.7 mL of HBr
(c) At the titration midpoint
(d) At the equivalence point
(e) After adding 54.1 mL of HBr
Determine the pH during the titration of 33.6 mL of 0.295 M
methylamine (CH3NH2, Kb = 4.2×10-4) by 0.295 M HClO4 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 HClO4
(b) After the addition of 12.4 mL of HClO4
(c) At the titration midpoint
(d) At the equivalence point
(e) After adding 49.1 mL of HClO4
Suppose 25.00 mL of 0.0500 M CH3NH2
(Kb = 4.4 × 10-4) is titrated with 0.0625 M
HCl.
How many millimoles of CH3NH2 are present
initially?
How many millimoles of HCl are required to reach the equivalence
point?
What is the equivalence point (in mL)?
What is the total volume (in mL) of analyte solution at the
equivalence point?
At the equivalence point, which are the principal species
present (excluding Cl-)?
Select one:
a. H2O and CH3NH2
b. H2O and...
Background: A 102.4 mL sample of 0.110 M methylamine (CH3NH2,
Kb=3.7×10−4) is titrated with 0.230 M HNO3. Calculate the pH after
the addition of each of the following volumes of acid.
A.) 0.0 mL
B.) 24.5 mL
C.) 49.0 mL
D.) 73.5 mL
A 101.6 mL sample of 0.115 M methylamine (CH3NH2;Kb=3.7×10^−4)
is titrated with 0.265 M HNO3. Calculate the pH after the addition
of each of the following volumes of acid.
a) 0.0 mL b) 22.0 mL c) 44.1 mL d) 66.1 mL
A 111.4 mL sample of 0.100 M methylamine (CH3NH2;Kb=3.7×10−4) is
titrated with 0.245 M HNO3. Calculate the pH after the addition of
each of the following volumes of acid.
0.0mL
22.7mL
45.5mL
68.2mL
117.8
mL
sample of 0.120
M methylamine (CH3NH2;Kb=3.7×10−4)
is titrated with 0.250
M
HNO3.
Calculate the
pH
after the addition of each of the following volumes of acid
0.00 mL
28.3 mL
56.5 mL
84.8 mL
A 111.0 mL sample of 0.105 M methylamine (CH3NH2;Kb=3.7×10−4) is
titrated with 0.265 M HNO3. Calculate the pH after the addition of
each of the following volumes of acid:
22.0 mL
Express the pH to two decimal places.
44.0 mL
Express the pH to two decimal places.
66.0 mL
Express the pH to two decimal places.
A 112.6 mL sample of 0.110 M methylamine
(CH3NH2;Kb=3.7×10−4) is titrated with 0.265
M HNO3. Calculate the pH after the addition of
each of the following volumes of acid.
You may want to reference (Pages 682 - 686)Section 16.9 while
completing this problem.
Part A
0.0 mL
Express the pH to two decimal places.
pH =
nothing
SubmitRequest Answer
Part B
23.4 mL
Express the pH to two decimal places.
pH =
nothing
SubmitRequest Answer
Part C
46.7 mL
Express the...