cave chemistry
Post on 30-Dec-2015
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Cave Chemistry. What cave formation needs: 1. Make a hole in the ground 2. Partially fill it with cool formations. Cave Chemistry. CaCO 3 (s) Ca 2+ (aq) + CO 3 2- (aq) K sp (CaCO 3 ) = 4.8 x 10 -9 Calculate solubility in mg/L: Actual solubility: 80 mg/L Why???. - PowerPoint PPT Presentation
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Cave Chemistry
What cave formation needs:
1. Make a hole in the ground
2. Partially fill it with cool formations
Cave ChemistryCaCO3(s) Ca2+(aq) + CO3
2-(aq)
Ksp(CaCO3) = 4.8 x 10-9
Calculate solubility in mg/L:
Actual solubility: 80 mg/LWhy???
Effect of [CO2]. What should happen as [CO2] increases?
CaCO3(s) Ca2+(aq) + CO32-(aq)
CO2 + H2O H2CO3
H2CO3 HCO3- + H+ Ka1(H2CO3) = 4.2 x 10-7
HCO3- CO3
2- + H+ Ka2(HCO3-) = 4.8 x 10-11
CaCO3(s) Ca2+(aq) + CO32-(aq)
CO2(g) + H2O(l) H2CO3(aq)
H2CO3(aq) HCO3-(aq) + H+(aq) Ka1(H2CO3) = 4.2 x 10-7
HCO3-(aq) CO3
2-(aq) + H+(aq) Ka2(HCO3-) = 4.8 x 10-11
The Key Reaction is:
So: 1. Formation of the big hole
So: 2. Making those formations
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