How I did this was to note down the colour of the flame from each different metal salt solutions. Method: To do this experiment you will need a Bunsen burner, nichrome wire loop, hydrochloric acid 2M, salt solutions and water samples. First of you will need to clean your nichrome wire loop by dipping it into the beaker of hydrochloric acid 2M and then placing the wire into the flame until no colour is visible. Next you will need to get your 7 different metal salt solutions which are: Lithium, Sodium, Potassium, Copper, Calcium, Barium and Strontium, then one by one dip the nichrome wire loop into the hydrochloric acid and into your first metal salt solution which would be Lithium and then place the nichrome wire loop with the metal salt solution in the edge of the flame, Then finally when a colour shows in the flame note it down along with the name of the metal salt solution you are testing. Repeat this with the following metal salt solutions: Sodium, Potassium, Copper, Calcium, Barium and Strontium.
It was found that the unknown mixture was comprised of 49.8% NaCl, 36.8% SiO2, and 13% CaCO3. Introduction The key to this experiment is to understand solubility and know how to use the solubility of certain components to separate mixtures. Knowing which components are soluble in the solutes that are available proves to be very advantageous. To start the experiment, the unknown ternary mixture will be added to water to produce a solution that includes all of the components of the original mixture (NaCl, SiO2, CaCO3). Since the sodium chloride is soluble in water, gravity filtration will allow for separation of the calcium carbonate and sand (residue) from the NaCl+H2O (filtrate) solution.
Ghostbuster Slime Lab 10/4/2012 Abstract The purpose of this experiment was to observe the physical properties and changes of the creation of a polymer as a result from cross-linking. A borax solution was made and was combined with a polyvinyl alcohol solution. A polymer’s cross-links give them many properties, like bonding ability, elasticity, and viscosity. The amount of water added in the experiment directly affected the viscosity and elasticity of the slime polymer. Too much water added resulted in a high viscosity and low elasticity.
Neutralization Osaji Obi 3/28/2013 Introduction The objective of this experiment is to determine the neutralization curves for weak monoprotic and polyprotic acids, and to learn potentiometric pH measurement. Pka is also needed to be determined by the equation of –log(Ka). To find that we use half neutralization and titration with a strong acid. Procedure The solution is diluted to the mark with distilled water. A burette with the standardized NaOH solution is filled.
Part Two: 1: The purpose of this experiment was to remove the contaminants from the impure Acetanilide and see how much of the crystals we could recover through the recrystallization process. 2: Chemicals and equip: Acetanilide, 600 ml beaker, 250 ml beaker, hot plate, filter paper, decolorizing charcoal, stemless funnel, vacuum filtration apparatus, and clamps. 3: In this experiment we took 6 grams of impure acetanilide and put it through a recrystallization process to filter out the impurities. We let our solution dissolve into a solvent that included hot water and decolorizing charcoal. We then let it boil and become one substance.
LAB REPORT: Hydrolysis of Acetylsalicylic Acid PURPOSE: The purpose of this lab is to become familiar with the identification of ester, carboxylic acid and alcohol functional groups, to understand that formation and hydrolysis of esters are equilibrium processes, to understand how ester hydrolysis yields carboxylic acid and alcohol products, and to understand what a sympathetic ink is and how such inks are visualized. PROCEDURE: 1. Crushed two 325mg aspirin tablets into powder; placed the powder in a 50 or 100mL beaker; added 2 grams of sodium carbonate; then measured and added 20mL of water. 2. Stirred the mixture occasionally; covered it with plastic wrap and allowed to stand overnight in a safe place undisturbed to hydrolyze the aspirin to salicylic acid; noticed the odor of acetic acid in the beaker the following morning.
1) In addition to sodium chloride, brine often contains potassium chloride, lithium chloride, and calcium chloride (i.e., KCl, LiCl, and CaCl2, respectively). Consequently, these compounds may be present in (and thus contaminate) the desired solid product – i.e., baking soda (NaHCO3) – when it is dried and filtered. In order to determine the composition and purity of the baking soda produced by ABSC, Team AMEE will utilize the following experimental techniques. First, using thermal gravimetric analysis, Team AMEE will determine the percent by mass of sodium bicarbonate in a
Chapter # 9 Column Chromatography Purpose The purpose of this lab is to become familiar with the theory and process of column chromatography as it is used to separate two substances, in this case, Lycopene and β-Carotene. This is done by first extracting lycopene from tomato paste and β-Carotene from carrot puree. First, the each paste is treated with acetone to remove as much water as possible. Then, the extraction is performed with three 5-mL portions of dichloromethane. Each organic extract is then dried over anhydrous calcium chloride pellets and evaporated to dryness.
Subject: Separation of unknown organics by flash column chromatography Introduction Column chromatography is a process that is used as a purification technique. The purpose of this lab is to isolate desired compounds from a mixture. The goal of this experiment is to apply column chromatography to separate two compounds and analyze their purity. It will be accomplished by running the mixture to be analyzed through the top of the column tube and then find purities by a TLC plate after the mixture has been separated. Reactions: Results: Calculations: Discussion: The TLC plate had 5 circles, indicating the 5 compounds, when it was under the UV lamp.
Introduction In Project 2, the goal of the experiment was to test for the active acidic or basic ingredients in a commercial product. By using standardized solutions of HCl and NaOH to perform a titration of the chosen commercial product, which was Vitamin C tablets and lime juice, the ascorbic acid content could be taken and compared to the manufactures standards. The information that was gained in this experiment can be compared to the manufacture’s stated amount of Vitamin C and lime juice in the nutrition facts, and our rests would either refute their measurements or prove them to be truthful. If our tests concluded that the sample of their product was so far off that it exceeds a 20% error, it will be out of the FDA standards of acceptable error and in turn be considered defective. Methods My group used the method of titration to test whether the Vitamin C and lime juice nutritional facts where correct from their manufacture.