CHEM 3281 Experiment Seven Determination Of The Composition Of A Multi-Component Mixture By Spectrophotometric Analysis Objectives: 1.Solid sample handling 2.The composition of a three-component mixture will be assayed by dissolution of the soluble components in water and measurement of their individual concentrations by visible spectrophotometry. Text Reference: Handbook of Instrumental Techniques for Analytical Chemistry‚ Frank Settle‚ editor. Prentice Hall‚ ‚ Upper Saddle River‚ NJ 1997‚ Ch 25
Premium Concentration Absorbance
EXPERIMENTAL PROCEDURE: 1. 2.07 g of the mixture of naphthalene and benzoic acid was weighed accurately on a balance. The mixture was then dissolved in 40 ml dichloromethane and the solution was poured into a separatory funnel. 2. 20 ml of aqueous sodium bicarbonate solution was added to the dichloromethane. A stopper was placed on the separatory funnel and was shaken and pressure was frequently released. The 2 liquids separated into clear layers and the lower layer (dichloromethane layer) was
Free Liquid Water Sodium bicarbonate
Alkenes from Alcohols: Analysis of a Mixture by Gas Chromatography Aim: To analyze a mixture of alkenes by gas chromatography. Introduction: In this lab‚ we specifically used elimination reaction; however we only used the E1 reaction. In the presence of strong acids‚ alcohols protonate to form a good leaving group‚ namely water. Upon loss of a proton to a good leaving group‚ an introduction of unsaturation (a double bond) can be preformed. According to Wikipedia‚ an E2 reaction is typically
Premium Alkene Organic reaction Chromatography
Background of the Study Hair loss (alopecia) is a common disorder in dogs which causes the animal to have partial or complete hair loss. It can affect a dog’s skin‚ its endocrine system‚ its lymphatic system‚ and its immune systems. Alopecia can affect dogs and cats of all ages‚ breed and gender‚ and is either gradual or acute. Alopecia is extremely noticeable‚ and is characterized as a varied or a symmetrical hair loss. It may also be seen as bald circles‚ accompanied by crusting and inflammation
Premium Metabolism Immune system Skin
Darsh Patel Dr. Anthony Chem 101-L 20 March 2013 Indirect gravimetric determination of hydrate compound in a mixture Objective To determine the percent BaCL2*2H2O in sample of hydrated mixture. Materials: Aprons‚ goggles Gravimetric balance(electronic weighing scale) Crucible without cover Bunsen burner Lighter flint Iron Support stand Wire mat‚ glove Clay triangle Procedure: Step 1. Support a clean porcelain crucible and its cover on a clay triangle (see Figure 1). Heat them in
Premium
Ultra-High Strength Concrete Mixtures Using Local Materials Srinivas Allena1 and Craig M. Newtson2 1 New Mexico State University‚ Civil Engineering Department‚ P.O. Box 30001‚ MSC 3CE‚ Las Cruces‚ NM 88003-8001; PH: (575) 571-9490; FAX: (575) 646-6049; email: srinivas@nmsu.edu 2 New Mexico State University‚ Civil Engineering Department‚ P.O. Box 30001‚ MSC 3CE‚ Las Cruces‚ NM 88003-8001; PH: (575) 646-3034; FAX: (575) 646-6049; email: newtson@nmsu.edu Abstract This paper presents the
Premium Concrete
Soda Ash Analysis and Volumetric Analysis of a Carbonate-Bicarbonate Mixture De Guzman‚ Danica Justine R. Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas Espana‚ Manila Abstract Titration is a laboratory method in which the endpoint of a reaction is determined quantitatively. In this experiment‚ the amount of soda ash present in a sample was determined and the alkalinity reported as it was titrated using HCl as the titrant. Also‚ the percentage
Premium Acid Carbon dioxide Chemistry
6. Results and Discussion 6.1. Mix Design of Cold Recycled Bituminous Mixture Compaction characteristics of untreated bitumen mixes according to Modified Proctor Test is shown in Figure 6. When the RAP content increased‚ it resulted in reduction of MDD and the corresponding increase in OMC. The decreased MDD is obtained due to the weak bond between RAP and the virgin material and also due to less fine material that plugs the voids to produce denser mix. The corresponding increase in OMC is
Premium Water Solvent Solubility
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
Premium Titration PH Carbon dioxide
ASSESSING CRITICAL THINKING SKILLS THROUGH A LABORATORY ACTIVITY ON MIXTURES An Undergraduate Thesis Presented to the Faculty of the Department of _____________________ College of ______________ _______________________ _________ City In Partial Fulfillment of the Requirements for the Degree Bachelor of ______________ Major in _________________ ___________________________ ___________________________ CHAPTER I THE PROBLEM AND ITS SCOPE Introduction Thinking has
Premium Critical thinking Reasoning