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# Determine overall Keq, given K1 and K2

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Given the following information:
H2S (aq) <-> H+ (aq) + HS- (aq) K= 8.9 x 10^-8
H+ (aq) + S2- (aq) <-> HS- (aq) K= 8.3 x 10^12
determine the equilibrium constant for the reaction:
H2S (aq) <-> 2 H+ (aq) + S2- (aq)

##### Solution Summary

Two reactions with their balanced equations, K1 and K2 are given. Students are to calculate the K1 and K2 for the rearranged, flipped, and re-organized equations. And from there, calculate the overall Keq.

##### Solution Preview

Given the following information:
H2S (aq) <-> H+ (aq) + HS- (aq) K= 8.9 x 10^-8
H+ (aq) + S2- (aq) <-> HS- (aq) K= 8.3 x 10^12
determine the ...

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