Read the following paper on water exchange for [Ir(H2O)6]3+: Cusanelli, A. et al. J. Am. Chem. Soc. 1996, 118, 5265. Answer the following questions. a. How do the authors follow the rate of water exchange? b. What are the values for the entropy and volume of activation (ΔS‡ and ΔV‡, respectively) at 298 K? Why are these values inconsistent with a dissociative mechanism (either D or Id)? c. How do the authors distinguish between possible Ia and A mechanisms for water exchange at Ir(III)? d. What is the authors’ explanation for the faster water exchange by the deprotonated [Ir(H2O)5(OH)]2+?

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.