Complexometric Titration of Calcium Lab Report Example | Topics and Well Written Essays - 1000 words - 1

Complexometric Titration of Calcium - Lab Report Example In this experiment, the searchers are trying to perform a complex formation reaction for analytical purposes. The main aim of this titration reaction is to determine the presence of calcium ions in a titrant by a method referred to as titrimetric. The chemists use the common titrant referred to as ethylenediaminetetraacetic acid, (EDTA). This acid is commonly used in complex formation reactions because of its ability to form complexes with most metal ions because of its tetrabasic form. The EDTA acid molecule has a hexadentate ligand structure having four oxygen and two nitrogen molecules which donate atoms simultaneously. One major advantage of using EDTA as a chelating agent is because it forms a stable compound with most metals ions in a reacting ration of 1:1. Secondly, the reaction between EDTA and metal ions forms larger compound structures such that the reaction is product favored making it suitable for the reaction to proceed to full completion. These two major advantages mak e EDTA be the preferable titrant in most complex formation reactions. The purpose of this titration reaction is to determine the presence and concentration of calcium carbonate, (CaCO3) in an unknown solution sample. The known reagents in this reaction include the following: First, there is a known amount of Ammonia buffer solution. Secondly, there is Disodium EDTA dehydrate with an FW of 372.24. Thirdly, there is a calcium carbonate with an FW of 100.87 which is primary standard and dried for a period of about 2 hours at 100 0c.