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Geology Notes - 2 Transformation One mineral(primary...

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Geology Notes: Chemical Weathering: Acids involved in weathering Organic acid in soils Carbonic acids- forms in rainwater or surface waters. CO2 + H2O ---> H2CO3 (carbonic acid) Ph = 5 6 Rain and stream/ lake waters H2CO3 H+ + HCO3- = bicarbonate ion H+ = Hydrogen ion HCO3- H+ + CO2- 3- Carbonate ion 1. Dissolution Calcite = CaCO3 + H2o + CO2 Ca2+ + 2HCO3- (Equation does balance)
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Unformatted text preview: 2. Transformation - One mineral (primary) another mineral (secondary). (Pedogenic- mineral if formed in soil) NaCl Na+ Cl- Na+ + Cl- NaCl KAIS13O8- potassium feldspar KAIS13O8 + 2H+ + H2O 2K+ + Al2SI2O5 (OH)4+ SiO 4 2 (Silicic Acid) Kaolinite Clay FeMgSiO 4 – Olivine FeMgSiO 4 + 4H 2 O Fe^2+ + mg^2+ + 4OH- + H 4 SiO 4 – Dissolution...
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