Karl Fischer titration Essays

Chemistry Exploration Topic: determining the activation energy of a chemical reaction Research Question: What effect does temperature of the chemical reaction have on the activation energy ? ICT: Microsoft Word Autograph Microsoft Excel Introduction This experiment is designed to help in estimating the activation energy of the rate-limiting step in the acid catalyzed reaction of acetone with iodine. This is achieved by measuring the reaction rates at different reaction temperatures over

BS1003 – Organic Chemistry Practical 1 Laboratory Report Name: Tristan Chan Yew Kit, U1640436J (T8) Effects of Dichloromethane(DCM) in Extraction of Caffeine from Tea Leaves Purpose To investigate the ability for Dichloromethane(DCM), a moderately polar organic solvent, to extract aqueous caffeine molecules, originating from Tea Leaves suspended in water. Introduction Caffeine, defined chemically as 1,3,7-trimethylxanthine (C8H10N4O2), is an alkaloid that can be found in tea leaves, coffee and many

Synopsis This experiment is the determination of Calcium Carbonate (CaCO3) content in toothpaste with the use of back titration while demonstrating quantitative transfer of solids and liquids. A accurately weighed quantity of toothpaste was dissolved in excess volumes of HCl. This solution is then titrated with NaOH to find the volume of the excess HCl. The volume of HCl reacted, which is found by substracting the volume of given HCl with the volume of excess HCl reacted, can be further manipulated

are used to mean the same thing total acidity is the total amount of organic acids in the food sample. This all acids (tartaric, oxalic acid, citric acid, sulfuric acid, lactic acid and acetic acid) The acidity can be determined by using titration method. Titration is a laboratory method of quantitative chemical analysis that uis used to determine the unknown concentration of a known reactant. Because volume measurements play

another body, but it seemed as no passersby really cared. “It was as if none of us dared to acknowledge what was at stake here (Krakauer, pg. 107). This was another of the many warnings that Krakauer did not heed. By May, Krakauer noticed that Scott Fischer did not have his usual upbeat attitude (pg. 148). “He looked anxious and extremely tired” (Krakauer, 148). On May 8th, a boulder smashed into Andy Harris’ chest, leaving him in a state of shock for several minutes. It would seem at this point that

Standard Preparation: 100 mg of standard ascorbic acid was weighed precisely and transferred to a 100 ml volumetric flask, added 70 ml of 0.5% sodium metabisulphite and dissolved by shaking. The volume was made up to the mark with 0.5% sodium metabisulphite for getting a concentration of 1 mg/ml. 2 ml of this solution was taken into another 100 ml volumetric flask and made the volume up to the mark with 0.5% sodium metabisulphite which resulted in concentration of 0.02 mg/ml. The solution was filtered

The purpose of this experiment is to analyze the P content in a wastewater sample and to test the efficiency of 2 different methods for P removal from wastewater. To analyze the P content in a wastewater sample, standard P solution is made and calibration curve is generated and phosphate concentration in wastewater is determined by using calibration curve that is generated. To determine the concentration of P, vanadomolybdophosphoric acid spectrophotometric method is used. The predominating form

A mobile phase system consisting of acetonitrile and 25mM phosphate buffer of pH 3(sodium dihydrogen phosphate monohydrate adjusted with orthophosphoric acid) in a ratio 60:40 (v/v) were used. The mobile phase was degassed and filtered by passing through 0.45 µm pore size membrane filter (Millipore, Milford, MA, USA) prior to use. The flow rate was 1.0 mL min-1 all over the run. The injection volume was 20 µL. The eluent was monitored by the diode array detector (DAD) which was set at 250 nm for

1 Experiment 7: Titration of an Antacid Objective: In this experiment, you will standardize a solution of base using the analytical technique known as titration. Using this standardized solution, you will determine the acid neutralizing power of a commercially available antacid tablet. Introduction An understanding of the properties of acids and bases is an essential part of understanding chemical reactions (see Tro, pp 167-171). In aqueous solutions, a compound that produces H+ ions upon dissolution

Decomposition of Aspirin Studied with UV/Visible Absorption Spectroscopy Aims:  To determine the concentration of salicylic acid, formed from the hydrolysis of Aspirin, at regular intervals using the UV/Visible Absorption Spectroscopy  From the concentration of salicylic acid, concentration of Aspirin to be determined using an equation  Calculate the rate constant of this reaction and its order from a plot of graph of ln(aspirin) vs time  Discuss the overall flaws and improvements to the experiment

Titration is an analytical method used in the laboratory to determine the concentration of an unknown solution using a solution of accurately known concentration referred as the standard solution. Since the volumes of both solutions and the concentration of

Experimental Methods: 1. SYNTHESIS OF 4-BENZOYL BUTYRIC ACID METHYL ESTER Materials required * 5 oxopentanoic acid : 2 gm (Aldrich) * Methanol : 50 ml * Acetic Acid (Rankem) Procedure: * 2 grams of 5 oxopentanoic acid was weighed and placed in a round bottom flask and then to it 50 ml of methanol was added. It was placed on a hot plate and the temperature was increased to 50 degrees under ambient air conditions. * To the RB, 2 ml of acetic acid was added and then by attaching a condenser the entire

Fat in chips: • First we wieghed out 10 g of crushed chips • We then put them in a beaker • Next we poured 50ml of pentane on it • We mixed them with a spatula • We then filtered the mixture through a funnel and glass wool to get rid of the chips (into a florence flask) • Before the destillation process we measured the florence flask and the cork ring • Through the destillation process we managed to separate the pentane and the oil • We weighed the oil with the flask and the cork ring and subtracted

In Section A, the average mass of the 50 ml beaker was weighed 3 times using 2 different electronic balances. The final average mass recorded was 33.73g. The volume of distilled water needed was calculated from the mass of water using the density= 0.9971g/mL in Section B. The volume of water needed was transferred using pipette, graduated cylinder and Erlenmeyer flask respectively. In Section C, a pipette was calibrated by measuring the water temperature and the density was determined. The average

Student’s Name Instructor’s Name Course Date Extraction Aim To separate a mixture of Benzoic acid, 4-t-butylphenol and Biphenyl and to determine the percentage recovery of each Theory Bicarbonate ions, when added to a mixture of the three substances, will convert the carboxylic acid (in this case, benzoic) to ions. Hydroxide ions on the other hand convert Phenols to ions. This makes them soluble in the aqueous layer as ions are soluble in water. However, addition of HCl to the aqueous ionic solutions

TEST: SOLUTIONS, ACIDS, AND BASES MULTIPLE CHOICE Select the answer that best completes the statement or that correctly answers the question. 1. The salt in water (only the solid) is the __________. a. Solvent c. Solute b. Solution d. Concentrate 2. The water in salty water (only the water) is the __________. a. Solvent c. Solute b. Solution d. Concentrate 3. A mixture of salt and water is knows as: a. Solvent c. Solute b. Solution d. Concentrate 4. What do you call a solution that contains

formula, and determine the limiting reactant in its formation. A reaction between iron III chloride hexahydrate and potassium oxalate monohydrate produced 3.307g of potassium trioxalatoferrate (III) trihydrate with a 62.0 percent yield. A permanganate titration determined the average percent composition of oxalate was 53.3% with a 2.22% standard deviation. The percent composition revealed the compound’s empirical formula to be FeK3(C2O4)3•3H2O. Potassium oxalate proved to be the limiting reactant. Results

GRAVIMETRIC DETERMINATION OF MOISTURE AND PHOSPHORUS IN FERTILIZER SAMPLES Magdato, K. C. , Balbuena, J. S. Institute of Chemistry, University of the Philippines, Diliman Quezon City Date Performed: August 27, 29 and September 3, 2014 Date Submitted: September 10, 2014 Abstract The experiment aims to use gravimetric method of analysis in determining the moisture and phosphorus content in a fertilizer sample which is important in plant growth. The procedure included constant weighing of the crucible

The technique utilized in this experiment was titration and is used to determine the concentration of an unknown solution by reaction with a known concentration of solution. In a titration, the titrant is placed into the burette and the analyte poured into the conical flask using a pipette. Titration involves adding a small amount of titrant slowly to the analyte to achieve the equivalence point. The equivalence point is when the moles of standard soluton are same as the solution of unknown concentration

Elodea” was put into a tank labelled “chemically treated Elodea”. Three drops of phenolphthalein were added to each beaker and then all of them were placed on a sheet of white paper. 0.02N NaOH was slowly added to the “tap water with Elodea” beaker with a dropper that delivers 0.025 mL per drop. Each drop was counted and the solution was stirred thoroughly before adding the next drop. This was continued till a faint pink color appeared in the solution. The number of drops was noted. The procedure