Chemlab: Chemistry 6


Coordination Chemistry 4

Overview

Getting Started

Techniques

Procedure

FAQ

Full Lab Manual

Introduction & Goals

Chemistry & Background

Key Questions

Prelab Problems

Safety

Procedure

In Your Write-up

Experiments Index

ChemLab Home

Applet Links

Kinetics plot
Use this applet to plot concentration or absorbance vs. time to confirm the reaction rate law.
Technique Links

Analytical balance

Pipet

Volumetric flask

Spectrometer: Analog

Spectrometer: Digital
Goals
This week you will complete your study of the mechanism of ligand exchange between your complex, Co(NH3)5H2O, and the nitrite ion, NO2- The reaction will be followed colorimetrically and the rates of exchange and ligand isomerization will be measured.

Key Questions
Which linkage isomer forms first and which forms subsequently? How do you know?

Why are pseudo-first order reaction conditions used?

Why should one isomer be kinetically favored and the other thermodynamically favored? What clues can the mechanism provide for deciding which isomer is which? What clues can the bonding of each isomer provide?

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