2. [30] The conversion of chromate to dichromate in an aqueous solution can be expressed by the following equilibrium equation: 2CrO42+2H+Cr2O72+H2O a) Use data from thermodynamic tables to obtain the value of the equilibrium constant for the transformation of chromate to dichromate at 25C. If the equilibrium chromate concentration of an aqueous solution is 1.2103M at a pH=5, determine its dichromate concentration. Neglect ionic strength effects. b) Approximately 750mg/L of NaCl are added to the solution described in part a). Determine the concentration of chromate and dichromate at the equilibrium established after the salt addition. Assume that the pH remains constant during the process. Does salt addition favor the formation of dichromate