The planet Aragonose (which is made mostly of the mineral aragonite, whose composition is CacOs) has...

 

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The planet Aragonose (which is made mostly of the mineral aragonite, whose composition is CacOs) has an atmosphere containing methane and carbon dioxide, each at a pressure of 0.10 bar. The oceans are saturated with aragonite and have a concentration of H*equal to 1.8x107 M. Given the following equilibria, calculate the concentration of calcium (in molarity) contained in specific volume of Aragonose seawater: CaCO, (s, aragonite) = Ca+ (aq) + CO (aq) Kp - 6.0 x 10-9 Kco, = 3.4 x 102 CO,(aq) + H,O(I) HCO5 (aq) + H*(aq) K, = 4.5 x 10-7 K2 = 4.7 x 10-1 CO,(g) = CO,(aq) %3D %3D HCO, (ag) = H*(aq) + Co (ag) Don't panic! Assume that pressure of CO2(g) at equilibrium is 0.10 bar. Reverse the first reaction, add all the reactions together, and see what cancels. The planet Aragonose (which is made mostly of the mineral aragonite, whose composition is CacOs) has an atmosphere containing methane and carbon dioxide, each at a pressure of 0.10 bar. The oceans are saturated with aragonite and have a concentration of H*equal to 1.8x107 M. Given the following equilibria, calculate the concentration of calcium (in molarity) contained in specific volume of Aragonose seawater: CaCO, (s, aragonite) = Ca+ (aq) + CO (aq) Kp - 6.0 x 10-9 Kco, = 3.4 x 102 CO,(aq) + H,O(I) HCO5 (aq) + H*(aq) K, = 4.5 x 10-7 K2 = 4.7 x 10-1 CO,(g) = CO,(aq) %3D %3D HCO, (ag) = H*(aq) + Co (ag) Don't panic! Assume that pressure of CO2(g) at equilibrium is 0.10 bar. Reverse the first reaction, add all the reactions together, and see what cancels.

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