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1. The rate constants of the exchange of the three leaving ligands (L) on the complex [Co(CN)sL]3. for the following reaction at 25 C are given in the table below. (Co(CN)sLp3- + H2O + Co(CN)sH2012- + L L k (s) Br 6.3 x 10-5 NCS 5.0 x 10-9 NO3 2.7 x 10-3 a) Based on the data on the table, is this reaction dissociative (D) or associative (A) mechanism? Justify. (1 Mark) b) Which leaving ligand (L) shows the strongest Co - L bond? Explain. (2 Mark) 2. For the following reaction, decide whether it favors the first order (SN') or second order (Sna) pathway? Give reason. (2 Marks) Cr(CO)6] + P(C4H9)3 -- (Cr(CO)s P(C4H9)3] + CO