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  • Aqueous Layer Water Add 10 Ml
    1,724 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...
  • Nucleotides And The Nucleic Acids
    475 words
    DNA is the single most important molecule found within cells. It is a stable poly nucleotide, which contains coded information for inherited characteristics. It is contained in chromosomes in the nucleus of an eukaryote cell. The essential features of the Watson-Crick model are summarise d below. 1. The two helical poly nucleotide chains are coiled around a common axis. The two chains have opposite polarity i.e. they are antiparallel. 2. The regular repeating sugar phosphate backbone of each str...
  • Various Levels Of Acids And Bases
    1,288 words
    ... n juice, and many others. Since I didn't have a source for hydrochloric acid, I added salt to vinegar to create HCl. I did the exact same experiment, using a ten to one acid to base ratio after testing them with pH paper, carefully wrote down the results, and then cleaned all of the used equipment. I repeated this until I could find no other chemicals to test, and than I made my charts. Discussion The following documents the outcome from my experiments. You can find the rest of the charts el...
  • Fatty Acids
    378 words
    Erwin Chargaff Erwin Chargaff, born 1905 in Czernowitz, Austria, was a pioneer in biochemistry contributing to the understanding of DNA. He, in 1928, earned his doctoral degree in chemistry at the University of Vienna's Spath's Institute in 1928. Erwin began his career in biochemistry at Yale University, working under Rudolph J. Anderson from 1928 to 1930. His early work included stories of the complex lipids, the fats or fatty acids that occur in microorganisms. Helping discover the unusual fat...
  • Cause Of Genetic Mutation
    1,090 words
    What is a mutation A mutation as defined by the dictionary is a sudden change in a heritable characteristic. There a several things that can cause a mutation in someone's or something's body. A genetic mutation is what causes mutations in an animal or human. To understand what a genetic mutation is and why it occurs, you would have to first understand the basics of DNA, including its structure. However since not everybody has the time to study DNA to learn about genetic mutations, I will try to ...
  • Unknown Acidic Solution And Concentration
    529 words
    Chemistry: Acid-Base Titration Purpose: The objective of this experiment were: a) to review the concept of simple acid-base reactions; b) to review the stoichiometric calculations involved in chemical reactions; c) to review the basic lab procedure of a titration and introduce the student to the concept of a primary standard and the process of standardization; d) to review the calculations involving chemical solutions; e) to help the student improve his / her lab technique. Theory: Titration was...
  • Ml Hcl L Molarity Naoh Now
    729 words
    Titration of an Acid with a Base Jeff Barker Chem. A-1 Wednesday, May 17, 2000 Introduction: When you combine strong acids and bases, perfect ionization is achieved. This means that all that is left after the reactions are water and the spectator ion. The definition of an acid is a substance that produces hydronium ions when dissolved in water. Acids have a pH range from 1-6. Bases release hydroxide ions when dissolved in water, with a pH level of 8-14. There are different segments of acids and ...
  • The Titration Of The Acid And Bases
    650 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...
  • Activity Of The H 1 Ion
    548 words
    Introduction: In 1909 S.P.L. Sorensen published a paper in Biochem Z in which he discussed the effect of H 1+ ions on the activity of enzymes. In the paper he invented the term pH to describe this effect and defined it as the -log [H 1+ ]. In 1924 Sorensen realized that the pH of a solution is a function of the 'activity' of the H 1+ ion not the concentration and published a second paper on the subject. A better definition would be pH = -log [aH 1+ ], where aH 1+ denotes the activity of the H 1+...
  • Acid Name
    852 words
    Organic chemistry is the study of essentially all substances containing carbon. Organic compounds that contain only carbon and hydrogen are called hydrocarbons. The simplest hydrocarbons are the alkanes which contain only single covalent bonds. Methane is the simplest alkane. It is also the major component of natural gas. Methane contains only 1 carbon in the molecular formula and the structural formula. There is ethane which is 2 carbons, propane that is 3, butane which is 4, pentane which is 5...
  • 3 H 2 O H Nh 3
    2,725 words
    CHEMISTRY 122 CHAPTER 17 NOTES CHAPTER 17 EXERCISES (THESE ARE NOT TO BE TURNED IN, BUT QUIZ QUESTIONS WILL BE TAKEN FROM THESE EXERCISES SO IT IS TO YOUR BENEFIT TO DO THEM): 2, 3, 5, 6, 8, 10, 13, 15, 16, 18, 19, 21, 23, 25, 27, 28, 29, 31, 33, 37, 39, 41, 43, 44, 47, 48, 50, 53, 57, 60, 63, 64, 67, 70, 71, 73, 75, 78, 80, 87, 95,102,112 Chemistry of Acids and BasesSvante Arrhenius (1884) developed a theory of acid-base reactions Arrhenius acid = substance that contains H and produces H+ ions ...
  • Reactions Of Metals With Water And Acid
    301 words
    Determination of a Chemical Formula Introduction: This lab will show us how we can use acid-base titration to find molecular formulas of compounds. Specifically, we will be working with Zinc, Calcium, Hydrochloric Acid, and Water. Data: Calculations: See notebook tear-out under "Calculations" heading Discussion: The purpose of this lab was to observe the reactions of metals with water and acid. We used Zinc and Calcium specifically. As I expected, the Calcium samples were more reactive to both w...
  • Ph Scale Acids
    367 words
    Acids Acid And Bases Conclusion: Acids appear in products people use every day. To start, an acid is a compound that releases hydrogen ions in water. In order to find out if a substance is an acid, one must test it with litmus paper and a pH scale. On the pH scale acids measure from 1 to 6, pH 1 being the most acidic (the highest concentration of hydrogen ions). One example of an everyday product that is an acid is lemon juice which is used for cooking. Lemon juice has a pH of 1, this means that...

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