Dissolution The easiest reaction pathway to comprehend is dissolution; this means that chemicals in rocks are dissolved in water Halite(naci) is a mineral that can be removed completely from a rock by dissolution
Dissolution ◼ The easiest reaction pathway to comprehend is dissolution; this means that chemicals in rocks are dissolved in water. ◼ Halite (NaCI) is a mineral that can be removed completely from a rock by dissolution
Hydrolysis Any reaction involving water that leads to the decomposition of a compound is a hydrolysis reaction Potassium feldspar, for instance, decomposes in the clay mineral kaolinite a Hydrolysis is one of the chief processes involved in the chemical breakdown of common rocks
Hydrolysis ◼ Any reaction involving water that leads to the decomposition of a compound is a hydrolysis reaction. ◼ Potassium feldspar, for instance, decomposes in the clay mineral kaolinite. ◼ Hydrolysisis one of the chief processes involved in the chemical breakdown of common rocks
Leaching Leaching is the continued removal, by water solution of soluble matter from bedrock or regolith a Soluble substances leached from rocks during weathering are present in all surface and ground water Sometimes their concentrations are high enough to give the water an distinctive taste
Leaching ◼ Leaching is the continued removal, by water solution, of soluble matter from bedrock or regolith. ◼ Soluble substances leached from rocks during weathering are present in all surface and ground water. ◼ Sometimes their concentrations are high enough to give the water an distinctive taste
Oxidation a Oxidation is a process by which an ion loses an electron
Oxidation ◼ Oxidation is a process by which an ion loses an electron
Minerals Solid weathering Soluble ions Neutral species products in solution in solution Feldspar- Clay minerals Na+ and Ca2+ Silica Fez+ mineral- Clay minerals and goethite+ Mg2+ Silica Magnetite- Goethite Feldspar Clay minerals Na+ and K1+ Silica Mica Clay minerals K Fe2+mineral-+Clay minerals and goethite+Mg2+ Silica Quartz Quartz Common chemical weathering reactions
Common chemical weathering reactions