The Unknown

color, was found and compared to their literature values to find their purity. The melting point range of a 9:1 mixture of Phenacetin and Tartaric acid was later found to show the effect an impure substance has on temperature. Melting point range for unknown three that was lastly tested was matched to Acetaminophen by comparing their melting points. Introduction: Melting point is loosely defined as the temperature at which a solid becomes a liquid. In chemistry, melting point, also recognized…

white officers there should be black officers as well. Abraham Lincoln and the unknown slave goals are similar as they both believe that the slaves should be free/ fight for freedom. But Lincoln goals are different to those held by the slave at least in the beginning as Abraham Lincoln cares more about the well-being of the union than the unknown slave does or he does at the start of the war. Both Abraham and the unknown slaves goals are different to Alexander H Stephens / the confederacy goals…

First was to calculate the mass of a empty graduated cylinder(1.58) and then the mass of a graduated cylinder filled with 5ml of the unknown liquid(2.11). Again to find the volume we calculated the difference which was 8ml. Then finally the information gathered was placed into the formula D=M/V and got 0.066g/ml. The final part of the experiment was to find the density of Air. This…

It was like any day before an exam, I was up in my room, laying down on my couch, practicing questions from my textbook. I had gone to the end of the chapter, trying to find a challenging question to attempt. The question I ended up picking required me to find a balanced chemical reaction equation, but only provided me with how much of each reactant and one product was present, as well as how much present by mass of each element in the given reactants and product there were. Upon beginning, I…

highly pure compound which is a reference for identifying the concentration of a known compound in titration. Titrant: in titration; titrant is a solution whose concentration is known. When there is an unknown solution (analyte), titrant is used for identifying the concentration of that unknown by adding titrant to analyte. (using burette) Acid –base indicator: acid- base indicator is an indicator that determines the pH of a solution by changing its color due to H+ ion concentrations inside the…

Identifying Unknown Esters Produced by Fischer Esterification Introduction This procedure was performed in order to prepare an ester using an unknown alcohol and unknown acid via Fischer Esterification. Then to identify this unknown ester using gas chromatography. Esters are a derivative of carboxylic acids. In the Fischer approach, an acid is used in order to allow the esterification to occur. Gas chromatography separates compounds by their elution time. Data and Results The compound in the…

My partner and I were given unknown number 3 in the laboratory. After performing various tests over the course of a few weeks on our unknown, we came to the conclusion that our unknown organism is Klebsiella pneumoniae (K. pneumoniae). K. pneumoniae is a gram negative bacillus shaped microorganism. We observed that K. pneumoniae is a nonmotile organism. We performed multiple tests on our unknown culture, therefore we are very confident that it is correctly identified. We identified that K.…

Influenza” John M. Barry, characterizes scientific research as “grunt” and “tedious” work, highlighting that scientists must acquire courage to accept and embrace uncertainty. Barry develops his ideas by utilizing an extended metaphor comparing the unknown and the known, antithetical ideas of uncertainty and certainty, and rhetorical questions to mirror the thought process a scientists encounters. Using references from scientists Claude Bernard and Einstein, Barry bolsters his thesis by…

ribcage as he was directed towards the hulking being made of the endless ebony void. “What are you?” The boy stammered helplessly. The creature forced the boy to sit on the mossy, damp, forest floor before speaking. “I am a creature of darkness, the unknown if you will. I feed on the beliefs society grasps in tightly clenched fists that they have a purpose,” the creature laughed, “it’s funny actually, humans having…

Discussion: Each test is a pertinent contribution to drawing an educated conclusion. After performing the gram staining and observing which unknown culture was gram positive, a catalase test was performed. The catalase test allows lab workers to differentiate Staphylococci and Streptococci genus. The test was performed only on the gram-positive culture. Bacteria that respire by the use of oxygen, otherwise known as aerobic respiration, produce enzyme or “catalase”. This protects the bacteria…