Chemistry Practice Problems Chemical Equilibrium Practice Problems Solution: The following equilibrium constants have been dete...

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Solution: The following equilibrium constants have been determined for oxalic acid at 25 °C.H2C2O4 (aq) ⟺ H+ (aq) + HC2O4 - (aq)    K1 = 6.5 x 10 -2HC2O4- (aq) ⟺ H+ (aq) + C2O4 2- (aq)        K 2 = 6.1 x 10 -5Calculate the equilibrium constant for the following reaction at the same temperature:                     C  2O4 2− + 2H + ⟺ H2C2O4 (aq)  

Problem

The following equilibrium constants have been determined for oxalic acid at 25 °C.

H2C2O4 (aq) ⟺ H+ (aq) + HC2O- (aq)    K= 6.5 x 10 -2

HC2O4- (aq) ⟺ H+ (aq) + C2O2- (aq)        K = 6.1 x 10 -5

Calculate the equilibrium constant for the following reaction at the same temperature: 

                    C  2O2− + 2H + ⟺ H2C2O4 (aq)