Hydroxyl radicals react with and eliminate many atmospheric pollutants. However, the hydroxyl radical does not clean up everything. For example, chlorofluorocarbons—which destroy stratospheric ozone—are not attacked by the hydroxyl radical. Consider the hypothetical reaction by which the hydroxyl radical might react with a chlorofluorocarbon: OH ( g ) +CF 2 Cl 2 ( g ) → HOF ( g ) +CFCl 2 ( g ) Use bond energies to explain why this reaction is improbable.
Hydroxyl radicals react with and eliminate many atmospheric pollutants. However, the hydroxyl radical does not clean up everything. For example, chlorofluorocarbons—which destroy stratospheric ozone—are not attacked by the hydroxyl radical. Consider the hypothetical reaction by which the hydroxyl radical might react with a chlorofluorocarbon: OH ( g ) +CF 2 Cl 2 ( g ) → HOF ( g ) +CFCl 2 ( g ) Use bond energies to explain why this reaction is improbable.
Solution Summary: The author explains that the H rxn is positive so that, the reaction is improbable.
Hydroxyl radicals react with and eliminate many atmospheric pollutants. However, the hydroxyl radical does not clean up everything. For example, chlorofluorocarbons—which destroy stratospheric ozone—are not attacked by the hydroxyl radical. Consider the hypothetical reaction by which the hydroxyl radical might react with a chlorofluorocarbon:
OH
(
g
)
+CF
2
Cl
2
(
g
)
→
HOF
(
g
)
+CFCl
2
(
g
)
Use bond energies to explain why this reaction is improbable.
" is
The structure of the bicarbonate (hydrogen carbonate) ion, HCO3-, HCO3
best described as a hybrid of several contributing resonance forms, two of which
are shown here.
HO
:0:
:Ö:
HO
+
Bicarbonate is crucial for the control of body pH (for example, blood pH:
7.4). A more self-indulgent use is in baking soda, where it serves as a
source of CO2 CO₂ 2 gas, which gives bread and pastry their fluffy
constituency.
(i) Draw at least one additional resonance form.
=
(ii) Using curved "electron-pushing" arrows, show how these Lewis structures may
be interconverted by movement of electron pairs. (iii) Determine which form or
forms will be the major contributor(s) to the real structure of bicarbonate,
explaining your answer on the basis of the criteria in Section 1-5.
Which of these is the best use of a volumetric flask?
measuring how much liquid it contains
delivering a precise amount of liquid to another container
holding solutions
making solutions of precise concentration
Chapter 10 Solutions
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