Analysis of Soda Ash and Volumetric Analysis of a Carbonate-Bicarbonate Mixture
Analysis of Soda Ash and Volumetric Analysis of a
Carbonate-Bicarbonate Mixture
Manalo, Ma. Cristina Joyce B.
Department of Chemical Engineering, Faculty of Engineering
University of Santo Tomas
Espana, Manila
A. Abstract
Crude sodium bicarbonate or commonly known as soda ash may contain amounts of impurities like chlorides and hydroxides. The total acid neutralizing capacity of a soda ash sample, its alkalinity value, was stated in terms of mass of sodium carbonate. In doing so, any sodium hydrogen carbonate present in the sample was converted to its equivalent neutralizing capacity in terms of sodium carbonate. A mass of the impure sample was dissolved and diluted in distilled water. 3 drops of indicator was mixed and the solution was titrated with the standard acid (HCl) to the endpoint.
Volumetric analysis is a quantitative analytical technique which employs a titration in comparing an unknown with a standard. A titration reaction may use two indicators, as in the analysis of carbonate-bicarbonate mixture. The two methods involved in this experiment were the classical method and the potentiometric method. In classical method, the endpoints of the two indicators (phenolphthalein and methyl orange) were determined using titration method. In the potentiometric method, the progress of the titration was monitored using a pH meter. B. Introduction
Sodium carbonate is an important industrial chemical. It is used in the manufacture of soap, glass, paper and as a source of alkalinity, that is, as a base. Glass, paper and as a source of alkalinity, that is, as a base. Soda ash, which is primarily sodium carbonate, contains unreacted sodium hydrogen carbonate and other impurities. The total acid neutralizing capacity of a soda ash sample, its alkalinity value, can be stated in terms of percent sodium carbonate. In doing so, any sodium hydrogen carbonate present in the sample is converted to its equivalent neutralizing capacity in terms of sodium
Carbonate-Bicarbonate Mixture
Manalo, Ma. Cristina Joyce B.
Department of Chemical Engineering, Faculty of Engineering
University of Santo Tomas
Espana, Manila
A. Abstract
Crude sodium bicarbonate or commonly known as soda ash may contain amounts of impurities like chlorides and hydroxides. The total acid neutralizing capacity of a soda ash sample, its alkalinity value, was stated in terms of mass of sodium carbonate. In doing so, any sodium hydrogen carbonate present in the sample was converted to its equivalent neutralizing capacity in terms of sodium carbonate. A mass of the impure sample was dissolved and diluted in distilled water. 3 drops of indicator was mixed and the solution was titrated with the standard acid (HCl) to the endpoint.
Volumetric analysis is a quantitative analytical technique which employs a titration in comparing an unknown with a standard. A titration reaction may use two indicators, as in the analysis of carbonate-bicarbonate mixture. The two methods involved in this experiment were the classical method and the potentiometric method. In classical method, the endpoints of the two indicators (phenolphthalein and methyl orange) were determined using titration method. In the potentiometric method, the progress of the titration was monitored using a pH meter. B. Introduction
Sodium carbonate is an important industrial chemical. It is used in the manufacture of soap, glass, paper and as a source of alkalinity, that is, as a base. Glass, paper and as a source of alkalinity, that is, as a base. Soda ash, which is primarily sodium carbonate, contains unreacted sodium hydrogen carbonate and other impurities. The total acid neutralizing capacity of a soda ash sample, its alkalinity value, can be stated in terms of percent sodium carbonate. In doing so, any sodium hydrogen carbonate present in the sample is converted to its equivalent neutralizing capacity in terms of sodium
Bibliography: 1. Analysis of Soda Ash URL: www.genchem.com/pdf/SodaAshTech.pdf 2. Determination of the Carbonate Content of a Soda-Ash Sample URL: http://www.csudh.edu/oliver/che230/labmanual/carbnate.htm 3. Acid-base Titration using Method of Double Indicators URL: http://cd1.edb.hkedcity.net/cd/science/chemistry/s67chem/pdf/sDL_4_Double_indicators.pdf. 4. Volumetric Determination of Carbonate and Bicarbonate URL: http://www.chemistry.nmsu.edu/image2/VOLUMETRIC%20DETERMINATION%20OF%20CARBONATE%20AND%20BICARBONATE.pdf. 5. ENCYCLOǢDIA Britannica, What is Volumetric Analysis? URL: http://global.britannica.com/EBchecked/topic/632594/volumetric-analysis