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Types of Chemical Weathering
Terms in this set (4)
the process by which the rock forms a solution in a solvent, usually water (i.e., dissolving; e.g., sugar or salt dissolving in water).
occurs when the oxygen dissolved in water oxidizes (combines) with metallic elements in rock to form oxides (e.g., iron oxide (rust); the oxide is weaker than the original mineral constituents
is chemical weathering by a weak carbonic acid (CO2 dissolved in water) that reacts with many minerals (especially limestone containing calcium, magnesium, potassium, and sodium).
The acid readily decomposes these (above) rocks, and produces products (ions) that are water soluble.
From this process, large quantities of rock (especially limestone) are dissolved and carried away by groundwater.
Such soluble ions are retained in the groundwater supply.
occurs when the minerals in the rock chemically combine with water to produce different compounds and minerals.
Hydrolysis is the primary process by which the silicates are decomposed.
The felsic minerals are more resistant to this form of weathering than the mafic minerals.
When the weaker minerals are dissolved by hydrolysis, the interlocking crystalline structure is compromised, and granular decomposition takes place.
The igneous rock granite weathers by hydrolysis.
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