5. The rate constants for the formation of [CoX(NH3)s]²* from [Co(NH3)s(OH2)]³* for X = CI', Br', N3, and SCN' differ by no more than a factor of two. What is the mechanism of the substitution? A) interchange associative, la B) associative, A C) interchange dissociative, Id D) dissociative, D

Consider the following reaction: [Cr(H2O)5(SCN)]2+  +  Yn-  -->  [Cr(H2O)5Y](3-n)+  +  SCN- Which statement is true if this reaction occurs via a dissociation mechanism? Group of answer choices Changing the incoming ligand, Yn-, will have a large effect on the rate constant. The first step of the mechanism is the addition of the Yn- ligand to form a 7-ccordinate intermediate, [Cr(H2O)5(SCN)Y](2-n)+ Changing the incoming ligand, Yn-, will have very little effect on the rate constant. It is impossible for this reaction to occur via a dissociation mechanism.

Circle all of the following species that exhibit geometric isomers. (a) [Rh(en)2 I2]I (b) [Pd(CO)2(CN)2](CN)2 (c) [Ni(C2O4)3]Cl4 Circle all of the following species that exhibit optical isomerism. (a) [Rh(en)2 I2]I (b) [Pd(CO)2(CN)2](CN)2 (c) [Ni(C2O4)3]Cl4

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