Chapter 8 Chemical Equations Solutions To Review Questions Page 9
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9- Chapter 8 -
41. (a)
CH
2 O
CO
2 H
O
4
2
2
2
(b)
2 H
O
2 H
O
2
2
2
42. (a)
CH
2 O
CO
2 H
O
4
2
2
2
(b)
2 C
H
9 O
6 CO
6 H
O
3
6
2
2
2
(c)
C
H
CH
9 O
7 CO
4 H
O
6
5
3
2
2
2
43. 1. combustion of fossil fuels
2. destruction of the rain forests by burning
3. increased population
44. Carbon dioxide, methane, and water are all considered to be greenhouse gases. They each act to trap the
heat near the surface of the earth in the same manner in which a greenhouse is warmed.
45. The effects of global warming can be reduced by:
1. developing new energy sources (not dependant on fossil fuels)
2. conservation of energy resources
3. recycling
4. decreased destruction of the rain forests and other forests
46. About half the carbon dioxide released into the atmosphere remains in the air. The rest is absorbed by
plants and used in photosynthesis or is dissolved in the oceans.
47. In the Northern Hemisphere, the concentration of CO
peaks once in May, dropping as plants use the CO
2
2
to produce growth, until October when the second peak occurs as a result of the fallen leaves decaying.
48. (a)
+
2+
2+
2+
2+
Ag
,
Co
, Ba
,
Zn
,
Sn
,
–
+Cl
2+
2+
2+
2+
AgCl(s)
Co
, Ba
, Zn
, Sn
,
–
2
+SO
4
BaSO
(s)
2+
2+
2+
Co
, Zn
, Sn
,
4
–
+F
ZnF
(s)
2+
2+
Co
,
Sn
,
2
–
+I
SnI
(s)
2+
Co
2
(b) All the anionic salts are sodium salts because you need to use soluble reagents and all sodium salts are
soluble.
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