Ethylenediamine ( N H 2 C H 2 C H 2 N H 2 , abbreviated en) is an organic base that can accept two protons: e n ( a q ) + H 2 O ( 1 ) ⇌ e n H + ( a q ) + O H − ( a q ) K b l = 5.2 × 10 − 4 e n H + ( a q ) + H 2 O ( l ) ⇌ e n H 2 2 + ( a q ) + O H − ( a q ) K b 1 = 3.7 × 10 − 7 Consider the titration of 30.0 mI of 0.100 M ethylenediamine with 0.100 M HCI. Calculate the pH after the addition of the following volumes of acid, and construct a qualitative plot of pH versus milliliters of HCI added: (j) 0.0 mL (ii) 15.0 mL (iii) 30.0 mL (iv) 45.0 mL (v) 60.0 mL (vi) 75.0 mL Draw the structure of ethylenediamine, and explain why it can accept two protons. What hybrid orbital do the N atoms use for bonding?
Ethylenediamine ( N H 2 C H 2 C H 2 N H 2 , abbreviated en) is an organic base that can accept two protons: e n ( a q ) + H 2 O ( 1 ) ⇌ e n H + ( a q ) + O H − ( a q ) K b l = 5.2 × 10 − 4 e n H + ( a q ) + H 2 O ( l ) ⇌ e n H 2 2 + ( a q ) + O H − ( a q ) K b 1 = 3.7 × 10 − 7 Consider the titration of 30.0 mI of 0.100 M ethylenediamine with 0.100 M HCI. Calculate the pH after the addition of the following volumes of acid, and construct a qualitative plot of pH versus milliliters of HCI added: (j) 0.0 mL (ii) 15.0 mL (iii) 30.0 mL (iv) 45.0 mL (v) 60.0 mL (vi) 75.0 mL Draw the structure of ethylenediamine, and explain why it can accept two protons. What hybrid orbital do the N atoms use for bonding?
Solution Summary: The author explains how the pH after addition of each given volume of acid should be calculated and a qualitative plot of pH versus milliliters of HCl constructed.
Ethylenediamine (
N
H
2
C
H
2
C
H
2
N
H
2
, abbreviated en) is an organic base that can accept two protons:
e
n
(
a
q
)
+
H
2
O
(
1
)
⇌
e
n
H
+
(
a
q
)
+
O
H
−
(
a
q
)
K
b
l
=
5.2
×
10
−
4
e
n
H
+
(
a
q
)
+
H
2
O
(
l
)
⇌
e
n
H
2
2
+
(
a
q
)
+
O
H
−
(
a
q
)
K
b
1
=
3.7
×
10
−
7
Consider the titration of 30.0 mI of 0.100 M ethylenediamine with 0.100 M HCI. Calculate the pH after the addition of the following volumes of acid, and construct a qualitative plot of pH versus milliliters of HCI added:
(j) 0.0 mL (ii) 15.0 mL
(iii) 30.0 mL (iv) 45.0 mL
(v) 60.0 mL (vi) 75.0 mL
Draw the structure of ethylenediamine, and explain why it can accept two protons.
What hybrid orbital do the N atoms use for bonding?
A first order reaction has 1/16 of the original amount left after 500 seconds. What is the half-life of thereactant in this reaction?
9B.2 Put the following species in order of increasing bond length: F2-, F2, F2+
Before solving the problem please also give a brief explanation of the concept or associated equation(s) and variables.
(In answer show and explain the sigma and pi bonds with electrons as should be used to help solve with that little graphic or what not)
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