• Acid Base Extraction Melting Point
    1,698 words
    Acid Base Extraction The purpose of this laboratory assignment was two-fold, first, we were to demonstrate the extraction of acids and bases, finally, determining what unknowns were present. Second, we were to extract caffeine from tea. These two assignment will be documented in two separate entities. Introduction: Acid / base extraction involves carrying out simple acid / base reactions in order to separate strong organic acids, weak organic acids neutral organic compounds and basic organic sub...
  • Effect Of Temperature On Reaction Rate
    546 words
    Effect of temperature on RUN rate Daniel Amir eh 10-3 Khalil KarajehFactors affecting rate of reaction: Surface area - as we increase surface area, we increase the reaction rate. The more the collisions the faster the reaction. Concentration - as we increase concentration we increase the reaction rate. In reaction with between gases, increasing the pressure, increase the reaction rate. Temperature - as we increase the temperature, we increase the reaction rate. Raising the temperature makes part...
  • Pressure Kinetic Energy
    1,189 words
    Aim: To find out the effect of temperature on the pressure of air. Apparatus: 400 ml beaker Bunsen burner Data Logger Pressure sensor Temperature probe Round bottom flask Connecting leads Tripod Gauze Plastic tubing Clamp stand Heatproof mat Water Diagram: Method: 1. Set up the apparatus as shown in the diagram. 1. Next, take the readings of the pressure and temperature at intervals of 5 C, ending the experiment at 90 C. 3. Repeat the experiment three times for a good average. 4. Record all res...
  • Melting Point Flask Caffeine Layer
    1,726 words
    The purpose of this laboratory assignment was two-fold, first, we were to demonstrate the extraction of acids and bases, finally, determining what unknowns were present. Second, we were to extract caffeine from tea. These two assignment will be documented in two separate entities. Introduction: Acid / base extraction involves carrying out simple acid / base reactions in order to separate strong organic acids, weak organic acids neutral organic compounds and basic organic substances. The procedu...
  • Dissolution Of The Theory Of Spontaneous Generation
    692 words
    Spontaneous generation is the belief that some life forms are created from non-living things. It was an accepted theory to explain the creation of living things since the times of the ancient Romans to the early nineteenth century, when people began to become more skeptical of this idea. By the 20 th century, spontaneous generation was known to be an incorrect theory. The reason it was known to be incorrect, primarily, was because of four scientists: Francesco Redi, John Needham, Lazzaro Spallan...
  • Acetic Acid Acetate Pentyl Iso
    1,715 words
    INTRODUCTION Isopentyl acetate, 'banana oil', is a naturally occurring compound that possesses a distinctive odor. It is found in bananas, as well as many other organisms. This experiment attempts to produce iso pentyl acetate by heating under reflux, which involves heating the mixture in a flask with a condenser placed vertically in the neck since any escaping vapours condense and run back into the flask, by combining iso pentyl alcohol with acetic acid and an acid catalyst. The product was iso...
  • Biology Heat Loss Practical Write Up
    2,289 words
    Biology Coursework Practical - Heat Loss The aim of this practical is to find to what extent does the surface area to volume ratio of an object affect the rate of heat loss from the object Hypothesis: As the ratio of surface area to volume of an object decreases the rate of heat loss from the object will also decrease. Objects with the same surface area to volume ratios loose heat at the same rate so long as there are not other variables involved. Background Knowledge: The surface area to volume...
  • Titration Erlenmeyer Flask
    647 words
    Titration Problem: When adding acids and bases what is the titration of the two Research: Amounts of reactants and products in a reaction are commonly investigated in two ways in the lab, gravimetrically (by mass), and volumetric ally (by volume and concentration). Titration is the name we give to the process used to determine the volume of a given solution needed to react with a given mass or volume of a sample. We will use the quantitatively study a neutralization reaction, in a neutralization...
  • Permanganate Solution Acid Flask Molarity
    943 words
    Purpose: The purpose of this experiment is to determine the molarity of a permanganate solution through the use of red ox titration. Theory: The following are the reactions that take place in the experiment: Unbalanced: H 2 C 2 O 4 (aq) + MnO 4- (aq)  CO 2 (g) + Mn 2+ (aq) H 2 C 2 O 4 Half-Reaction: H 2 C 2 O 4 (aq)  2 CO 2 (g) + 2 e- + 2 H+ (aq) MnO 4- Half-Reaction: 8 H+ + 2 MnO 4- (aq) + 5 e-  Mn 2+ (aq) + 4 H 20 (l) Net Reaction: 5 H 2 C 2 O 4 (aq) + 6 H+ + 2 MnO 4- (...
  • Accepted Ratio Error Graph Circumference
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    Determining the Ratio of Circumference to Diameter of a Circle In determining the ratio of the circumference to the diameter I began by measuring the diameter of one of the si objects which contained circles, then using a string, I wrapped the string around the circle and compared the length of the string, which measured the circumference, to a meter stick. With this method I measured all of the six circles. After I had this data, I went back and rechecked the circumference with a tape measure, ...
  • Water Bath Growth Coli Flask
    2,291 words
    The Effects of Various Factors on the Growth Rate of E. coli Introduction: There are times in our lives (as human beings) when people do not feel well. A doctor might diagnose them with a disease or an infection. There are also times when people do not feel clean. This could be a person's feeling after exercising, sweating, or maybe he / she had not taken a shower in a couple days. In any of the preceding scenarios, bacteria most likely played a major role in initiating a person's feeling of il...
  • Bromination Of Benzene Synthesis And Purification Of Bromobenzene
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    Organic Chemistry I LAB EXAM: FINALBROMINATION OF BENZENE SYNTHESIS AND PURIFICATION OF BROMOBENZENE: PROCEDURE DATA TABLE Chemical Boiling point C Melting Point C Density g / m L Solubility Benzene 80. 1 5. 5 0. 88 Slightly in H 2 Toluene 110. 6 -93 0. 87 Slightly in H 2 Bromobenzene 155-156 -30. 8 1. 50 InsolubleDibromobenzene 220. 40 87. 31 0. 96 Insoluble MATERIALS: Graduated cylinder Weight scale Buchner funnel Filter flask Rubber stopper Hot plateThermometerConical funnel Various size be...
  • Manual For Recrystallization Filter Paper
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    Instruction Manual The purification process: Recrystallization & Filtration Jason Williams 09-13-00 NATS 4310 Table of Contents Preface Chapter 1 Equipment involved and preparation Glassware and accessories Proper sterilization of equipment Safety precautions Chapter 2 Setup procedure before purification Equipment setup Choosing of solvent Chapter 3 Gathering of an unknown compound and the first step: filtration Collection Filtration Repeat Filtration and Cleaning Collection and measuring of cru...
  • Copper In Nitric Acid
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    3 Cu + 8 HNO 3 - 3 Cu (NO 3) 2 + 2 NO + 4 H 2 O The balanced equation seen on the top is what you attain when you place copper metal in concentrated nitric acid. In this process the identifiable characteristics of the metal will be completely changed and a new substance, cupric nitrate, will be formed. Copper forms two series of chemical compounds: cuprous, and cupric. Cuprous compounds are easily oxidized to cupric, in many cases by simple exposure to air; cupric compounds are stable. When nitr...
  • Analysis Of Cereal Volumetric Flask
    1,100 words
    Introduction The goal of this lab was to analyze the iron content in both iron tablets and cereal. The methods used to achieve this goal included using spectrometry to set a calibration curve and measure iron content within the mixture of cereal and the iron tablet. The absorbance of the mixtures were used in conjunction with the calibration curve to measure the amount of iron content in each. Experimental First the calibration curve was made by preparing a mixture of Fe (NO 3) 3 and KCSN with H...
  • Enzyme Catalase Graduated Cylinder
    1,462 words
    The Activity of Enzyme Catalase I. Introduction: What is an enzyme? It is! SSa protein serving as a catalyst, a chemical agent that changes the rate of the reaction without being consumed by the reaction!" (Campbell: Reece, 2002). Each enzyme acts upon a chemical substance called substrate, which fits into the active site (the portion of the enzyme that attaches itself to the substrate) like a lock and key, and is converted into the products during the reaction. Meanwhile the enzyme is released ...
  • Hydrochloric Acid Calcium Titre Results
    1,344 words
    My aim in this investigation is to analyse a solution of hydrochloric acid and calculate the concentration of acid it contains in gdm. Apparatus Solution of Hydrochloric Acid (HCL - 0. 3 molar) Solution of Calcium Hydroxide Ca (OH) 100 cm Conical Flask Pipette (25 cm) Pipette Filler Burette Distilled Water Volumetric Flask Funnel Methyl Orange Indicator White Tile. Method 1. Collect all the apparatus and set up as shown in diagram below. 2. Hydrochloric Acid should be diluted. I have to dilute ...
  • Louis Pasteur Spontaneous Generation
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    If I was to choose among the greatest benefactors of humanity, Louis Pasteur would certainly be up there at the top. Louis Pasteur has solved mysteries of rabies, anthrax chicken cholera and silkworm diseases, and contributed to the development of the first vaccines. He debunked the widely accepted myth of spontaneous generation, thereby setting the stage for modern biology and biochemistry. He described the scientific basis for fermentation, wine-making, and the brewing of beer. His work gave ...
  • Molar Volume Mol Gas Value
    2,095 words
    ABSTRACT The values for the universal gas constant R, and the volume of one mole of gas were determined. The experiment values of R and the volume of one mole of gas were then compared to the accepted values. The experimental values of R obtained were 0. 09067 (L∙ atm / mol ∙ K), 0. 09514 (L∙ atm / mol ∙ K), and 0. 09040 (L∙ atm / mol ∙ K). The molar volumes of hydrogen gas obtained were 0. 1306 (L/mol), 0. 1365 (L/mol), and 0. 1390 (L/mol). The percent error...
  • Simple Distillation Boiling Point
    661 words
    INTRODUCTION: Simple distillation is a process to purify volatile compounds or compounds with different boiling points. It is a simple process that takes a mixture of compounds and applies heat. The substance with the lowest boiling point, (usually the most volatile), will boil and vaporize first. Using a distillation apparatus consisting of a flask, glass tubes, thermometer, condensing tube and distillate container, the first gaseous vapor that rises can be condensed back into liquid. This liqu...