The enthalpy change for the given reaction, order of the entropy change and formation constant relation with Δ S ° and chelate effect of penten and en needs to be determined. Ni +2 (aq) + 6NH 3(aq) 𑨀 Ni(NH 3 ) 6 2+ (aq) K f = 3 .2×10 8 Ni +2 (aq) + 3 en (aq) 𑨀 Ni(en) 3 2+ (aq) K f = 1 .6×10 18 Ni +2 (aq) + penten (aq) 𑨀 Ni(penten) 2+ (aq) K f = 2 .0×10 19 Concept Introduction: A coordination complex is composed of two main parts; metal atom/ ion and ligand. Ligands are the atom/ group of atom/ ion that can donate its extra pair of electrons to the electron deficient metal cation. It leads to the formation of coordinate bond between metal ion and ligand.

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Chapter 19, Problem 83AE

Interpretation Introduction

Interpretation: The enthalpy change for the given reaction, order of the entropy change and formation constant relation with ΔS° and chelate effect of penten and en needs to be determined.

Ni+2(aq)+ 6NH3(aq)𑨀Ni(NH3)62+(aq) Kf= 3.2×108Ni+2(aq)+ 3 en(aq)𑨀Ni(en)32+(aq) Kf= 1.6×1018Ni+2(aq)+ penten (aq)𑨀Ni(penten)2+(aq) Kf= 2.0×1019

Concept Introduction: A coordination complex is composed of two main parts; metal atom/ ion and ligand. Ligands are the atom/ group of atom/ ion that can donate its extra pair of electrons to the electron deficient metal cation. It leads to the formation of coordinate bond between metal ion and ligand.

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