According to the Britannica Online Encyclopedia (nd), a coordination compound is any type of substance that has a chemical structure that contains a metal as the central atom and surrounding it are groups of non-metals which are called ligands linked by coordinated covalent bonds. This means that the bonding electrons are provided by the ligand, the central atom is a Lewis acid (electron acceptor) and the ligand is a Lewis base (electron donor). There are a large number of these compounds and have different uses in various fields. Some of these compounds are vitamin B12, hemoglobin, dyes and pigments as well as catalysts which are mainly used in the preparation of organic substances. Moeller et al (……) state that among the many uses of coordination compounds, these uses rely on the ability of each compound to selectively dissolve or bind metal ions or remove ions from solution. According to Mickey (1981), coordination compounds play important roles in homogeneous and heterogeneous catalysis, water purification, analytical chemistry, solvent extraction, photography, metallurgy and electrochemistry. Coordination compounds can be found in nature and are very vital to living organisms. These compounds occur in the form of enzymes and are called metalloenzymes. An example of these enzymes is carboxypeptidase [(CPD)Zn]. It is an important hydrolytic enzyme in digestion. With this compound, the coordinated metal ions are where the catalytic activity occurs. In agriculture, humic acids are organic compounds that accumulate in soil from decaying organic matter. These humic acids bind to metal ions in the soil that plants need. They then become soluble and are transported through the soil and the metals essential to the plant are...... middle of paper......, and the end point of the reaction is detected by the color change that happens. in the solution.Chemwiki UCDAVIS (nd) states that the color of a coordination compound can be determined using crystal field theory. These colors are then used to create pigments used for dyes in the textile industry. Coordination compounds are able to form these colors because their absorption energy is in the range of the visible light spectrum. The color visible in all chemical compounds is an indicator of the physical properties of the substance at the atomic level. When ligands are bonded to a transition metal during the formation of a coordination compound, splitting of the D orbital occurs. It is divided into high and low energy orbitals, this energy difference is called ∆ and this delta is a property of both the ligand and the metal..