1. Complete and/or balance the following chemical weathering or redox reactions (show all steps): a. Al2Si2Os(OH)4 (kaolinite) + H₂O→ Al(OH)3 (gibbsite) + H4SiO4° b. CaAl2Si2O8 (anorthite) → Al2Si2O5(OH)4 (kaolinite) c. Pyrite oxidation: FeS2 + O2 → Fe²+ + SO4²- d. Methane oxidation: CH4 + SO42- HCO3 + H₂S
1. Complete and/or balance the following chemical weathering or redox reactions (show all steps): a. Al2Si2Os(OH)4 (kaolinite) + H₂O→ Al(OH)3 (gibbsite) + H4SiO4° b. CaAl2Si2O8 (anorthite) → Al2Si2O5(OH)4 (kaolinite) c. Pyrite oxidation: FeS2 + O2 → Fe²+ + SO4²- d. Methane oxidation: CH4 + SO42- HCO3 + H₂S
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:1. Complete and/or balance the following chemical weathering or redox reactions (show all
steps):
a. Al2Si2O5(OH)4 (kaolinite) + H₂O Al(OH)3 (gibbsite) + H4SiO4°
b. CaAl2Si208 (anorthite)→→ Al2Si2O5(OH)4 (kaolinite)
c. Pyrite oxidation: FeS2 + O2 → Fe²+ + SO4²-
d. Methane oxidation: CH4 + SO42→ HCO3 + H₂S
20
2. Geochemists are concerned with the chemistry of natural waters because it affects
drinking water quality and ecosystem health. A water has the following chemical
analysis:
Nat
K+
Ca2+
Mg2+
Sr²+
Temp
120.0 ppm
15.00 ppm
380.0 ppm
22.00 ppm
0.8000 ppm
25.00°C
SO42-
CI
HCO32-
SiO₂
pH
1115 ppm
15.00 ppm
150.0 ppm
21.0 ppm
7.400
What are these concentrations in mmol/kg (use excel)?
b. Do the charges balance (total positive charges = total negative charges)?
c. Would you want to drink this water? Why or why not?
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