The unknown carboxylic acid’s melting point was 108°C according to the Mel-Temp machine. The melting point is the temperature at which a solid precipitate changes into its liquid form upon heating. The melting point of benzoic acid‚ the aromatic carboxylic acid was 122°C. Thus‚ the product contained impurities which caused the solid to melt at a lower temperature than the actual temperature. Pure solids typically melt at higher temperatures while impure solids melt at lower temperatures. This is
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Jackie Parks AP English 4 March 2017 Mrs. Vicknair The Unknown Assassin As the motorcade passed the Texas School Book Depository‚ the gunshot that would change history was heard throughout the crowd. Fragments of Kennedy’s skull are being gathered by Jackie‚ and the crowd is in awe. The president is dead. Lee Harvey Oswald‚ an employee at the depository‚ is arrested an hour after the killing. He can never defend his case because two days later Oswald is killed by Jack Ruby. Almost immediately
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a known quantity of solid dissolved in solution. It may also be used to calculate the molar mass of an unknown acid or base. Purpose: I. Prepare a standard solution of sodium hydroxide II. Standardize a sodium hydroxide solution by using potassium hydrogen phthalate (KHP) III. When given whether the acid is monoprotic‚ diprotic‚ or triprotic ‚ determine the molar mass of the unknown organic acid. IV. Calculate the Molarity of the Soft drink. Materials: * 50 mL Buret
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Intelligence: Knowns and Unknowns Ulric Neisser (Chair) Gwyneth Boodoo Thomas J. Bouchard‚ Jr. A. Wade Boykin Nathan Brody Stephen J. Ceci Diane E Halpern John C. Loehlin Robert Perloff Robert J. Sternberg Susana Urbina In the fall of 1994‚ the publication of Herrnstein and Murray ’s book The Bell Curve sparked a new round of debate about the meaning of intelligence test scores and the nature of intelligence. The debate was characterized by strong assertions as well as by strong
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The Abyss - Unknown Death. It is an odd thing‚ one moment you’re sitting in front of a desk pondering how to answer the question in front of you‚ the next extreme pain as if you’re entire body is being roasted alive. Then‚ well nothing. Just darkness‚ dull and boring. Those were the thoughts of the boy as he drifted in the abyss. His mortal coil no longer existence‚ only a dimly lit sphere in its place. “I’m not sure what’s worse‚ exams or this...” he muttered inwardly‚ originally he hadn’t been
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organism we had in our unknown mixed culture tube by running a series of experiments to detect which specific Gram negative organism we had. To detect your gram positive from the mixed culture was given as extra credit points also. A Gram stain was performed and isolation streak plate in order to isolate and observe the unknown organism. Before the series of test‚ a dichotomous key had to be written up in order to know what steps and tests to run to identify the unknown Gram negative organism. I had
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The identification of an unknown bacterial environmental isolate through a series of morphological‚ physiological and differential exercises. The purpose of the environmental isolate report is to learn what is necessary in order to take an unknown environmental isolate (EI) and identify it. This was achieved through a series of exercises that provided information on the morphological‚ physiological and biochemical traits of the EI which were then compiled and interpreted in order to make a presumptive
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Gram Negative Unknown Lab Report Abstract The Unknown Gram Negative bacterium inoculated in a Tryptic Soy broth medium was randomly selected from a group of other unknowns. In order to identify this unknown the seven different types of biochemical tests will be conducted on this unknown bacterium to identify it out of 6 possible bacteria; Escherichia coli(E. coli)‚ Enterobacter aerogenes (E.aerogenes)‚ Klebsiella pneumoniae (K.pneumoniae)‚ Proteus mirabilis(P.miranilis)‚ Pseudomonas aeruginosa(P
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in the medium. 3. What color is the EMB agar? Dark blue colonies with green metallic sheen or pink. 4. What does the EMB agar select for? Gram-negative bacteria. 5. What bacteria can easily be differentiated on EMB agar? Gram-positive. How is it recognized? It contains the dyes eosin and methylene blue‚ which inhibit the growth of gram-positive bacteria. 6. What color is the Mannitol Salt Agar (MSA)? Yellow color change in surrounding media. 7. What does the MSA agar select for
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forms of microorganisms are on the rise. The importance of identifying these pathogens and their related epidemiology has become increasingly more important. The purpose of this study was to identify an unknown bacterium in a controlled laboratory environment over a 5 week period. Utilizing a variety of differential testing and staining methods learned in the microbiology course‚ students were to determine the identity of an assigned unknown organism. Observations were made and recorded each week
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