Purpose The purpose of this experiment is to determine the mass of sulfate in the precipitate from the reaction of BaCl2 (aq) + SO42-(aq) → BaSO4(s) + 2Cl-(aq) while utilizing gravimetric analysis methods.
Introduction
Gravimetric Analysis utilizes the mass of a product to calculate the quantity of the original unknown analyte, Quantitative Chemical Analysis page 674. While this method of chemical analysis has been established since the eighteenth century, it is still one of the most accurate methods when determining how much unknown was present. The gravimetric analysis of a soluble sulfate lab allows for the experimenter to become better acquainted with techniques necessary for the completion of the experiment, while also understanding the pitfalls associated with carelessness and improper use of laboratory equipment. Techniques and Equipment utilized:
Tare and Weighing
Filtering
Ignition of Precipitate
Glassware Reading and Proper Handling
Weight to Constant Mass
M-22 Denver Instrument Analytical Balance
Ring Stand, Ring, and
References: The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 14th ed. O’Neal, M.J.; Heckelman, P.E.; Koch, C.B.; Roman, K.J., Eds.; Merck & Co.: Whitehouse Station, NJ, 2006 p. 166 CRC Handbook of Chemistry and Physics, 81st ed. Lide, D.R., Ed.; CRC Press: Boca Raton, FL, 2000 p. 4-103 Quantitative Chemical Analysis, 8th ed. Harris, D.C., Ed.; W. H. Freeman and Company: New York, 2010 p. 674