(a) In early studies it was observed that when the complex [Co(NH3)4Br2]Br was placed in water, the electrical conductivity of a 0.05 M solution changed from an initial value of 191 ohm -1 to a final value of374 ohm -1 over a period of an hour or so. Suggest an explanation for the observed results. (See Exercise 23.67 for relevant comparison data.) (b) Write a balanced chemical equation to describe the reaction. (c) A 500-mL solution is made up by dissolving 3.87 g of the complex.As soon as the solution is formed, and before any change in conductivity has occurred, a 25.00-mL portion of the solution is titrated with 0.0100MAgNO3 solution.What volume of AgNO3 solution do you expect to be required to precipitate the free Br-(aq) ? (d) Based on the response you gave to part (b), what volume of AgNO3 solution would be required to titrate a fresh 25.00-mL sample of [Co(NH3)4Br2]Br after all conductivity changes have occurred?