Oceanic uptake of carbon dioxide is thus described: CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1  H2CO3 ⇔ HCO3- + H+,  K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/L HCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/L CaCO3 ⇔ Ca2+ + CO32-    Kc = 4 x 10-9 M2 What is the full charge balance equation for this system?

World of Chemistry, 3rd edition
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Chapter15: Solutions
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Problem 43A
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Oceanic uptake of carbon dioxide is thus described:
CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1 
H2CO3 ⇔ HCO3- + H+,  K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/L
HCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/L

CaCO3 ⇔ Ca2+ + CO32-    Kc = 4 x 10-9 M2

What is the full charge balance equation for this system?

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