Waters & Weathering Flashcards
where is most of the earth’s water stored (3)?
- in oceans
- ice
- ground water
how is carbonic acid formed in oceans?
- dissolution of co2 in water
what is an ionic potential? (2)
- ion’s charge divided by its radius,
- measure of density of charge.
what does an ionic potential show? (2)
- shows how strongly/weakly the ion will be electrostatically attracted to ions of opposite charge,
- shows what extent the ion will repel other ions of like charge.
how do you calculate residence time?
amount of substance in water/ rate of removal or addition to reservoir
what is dissolution?
the processs whereby a mineral dissolves in a solvent as a result of freeing up its ions
What is formed by dissolution of co2 in water?
carbonic acid
why do rainwater and sea water share similar chemicals?
- waves crash
- send water into atmosphere
- starts to atomise chemistry in sea water
- marine areosols form, condensation nuclei for rain
What type of system is a geochemical cycle?
a closed system
name some examples of chemical weathering (4)
dissolution
oxidation
hydrolysis
hydration
what is waters key role on earth?
it is the earth’s weathering agent and connects earth surface processes
what is the link between melting point and crystallisation?
minerals with highest melting point crystallize first
how do you calculate relative bond strength?
charge/coordination number
what is the difference between congruent and incongruent mineral dissolution?
congruent= when everything gets dissolved and goes into solution incongruent= some is dissolved but some stays behind and makes a new mineral with leftover elements
what is feldspar?
an abundant rock forming mineral typically occurring as colourless/pale crystals and consuming aluminosilicates
