Mg determination Lab report Essay example

760 Words Sep 17th, 2014 4 Pages
Mg2+ Determination using EDTA
Linh Nguyen
Chem 1212L – 165
Feb 08 , 2014

Purpose and Procedure:
The purpose of this experiment is using Compleximetric titration and EDTA to determine the concentration of Mg2+ in solution; and also calculating the percent by mass of MgO in the unknown sample. This procedure results no significant deviations.

The procedure for the experiment is from the lab manual referenced below Laboratory Experiments for Chem 1211L & 1212L (6e), with Contributions from Georgia Perimeter Faculty, Cengage Learning, Block/McKelvy. Page 153 to 158 (Experiment Title: “Determination of Mg+ using a Complexmetric Titration”)

Introduction:
In this experiment, EDTA
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But the result met the expectation because the color of the solution was reached the end point by changing from red to blue. The primary errors may occur because of misreading the buret while measuring the volume of EDTA. Another error can affect the result of the experiment was that letting the volume of EDTA excess the ending point; so that the volume of EDTA was overapply that lead error. The last source of error was that our unknown sample had high percentage in mass of Mg2+, so that we need more than 50 ml of EDTA( which was the capability of the buret) to reach the end point. We had to refill the buret while measuring; and also the large volume of solution made the color harder to recognize the end point. That also led to error.
Discussion:
The experiment was successfully achieved the purpose of this lab: to determine the concentration of Mg2+ using compleximetric tritation. During the experiment, the color in the unknown solution was successfully changed

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