7.54 C O , C O 2 , C H 3 O H , and C O 3 2 − , all contain carbon-oxygen bonds. Draw Lewis structures for these molecules and ions. Given that double bonds are stronger than single bonds and triple bonds are stronger than double bonds, rank the four species in order of increasing C—O) bond strength.
7.54 C O , C O 2 , C H 3 O H , and C O 3 2 − , all contain carbon-oxygen bonds. Draw Lewis structures for these molecules and ions. Given that double bonds are stronger than single bonds and triple bonds are stronger than double bonds, rank the four species in order of increasing C—O) bond strength.
Solution Summary: The author explains the Lewis Dot structure of CO, CO_2, OH, and CO
7.54
C
O
,
C
O
2
,
C
H
3
O
H
, and
C
O
3
2
−
, all contain carbon-oxygen bonds. Draw Lewis structures for these molecules and ions. Given that double bonds are stronger than single bonds and triple bonds are stronger than double bonds, rank the four species in order of increasing C—O) bond strength.
5.(a) Nitrogen reacts with fluorine to form nitrogen trifluoride, NF3.
(i) The chemical equation can be represented as shown.
NEN + 3 F-F → 2 F-N-F
Some bond energies are shown in the table.
bond
bond energy in kJ/mol
NEN
945
F-F
160
N-F
300
Calculate the energy change for the reaction between nitrogen and fluorine, using the
following steps:
• energy taken in to break bonds
kJ
• energy released when bonds are formed
kJ
The structure of sodium hyaluronate, a sodium salt of hyaluronic acid used in
skincare products for its hydrating properties, is shown below.
What is the shape of the bonds at (ii) ?
Hint: atom (iii) has been completed for you as an example.
(iii) bond angle: 109.5°, geometry of the electron pairs: tetrahedral, shape of the
bonds: tetrahedral
ОН,
OH
·•·•·|||||
N
O
H
H
Ol..
OH
||||
iv
+
Na
Chapter 7 Solutions
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