LAB REPORT FOR EXPERIMENT #2: PURIFICATION OF ACETANILIDE BY RECRYSTALLIZATION Your name TA’s name Your Partner’s name Lab Section OBSERVATIONS: A. SELECTING A RECRYSTALLIZATION SOLVENT | |Solubility Test (cold) |Solubility Test (hot) | |Water |insoluble |soluble | |pet ether |insoluble
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Analyzing the effects of varying hydrogen peroxide (H2O2) concentrations on the volume of its drop Jonah Jemina IB Chemistry SL 11 Mr. Eastwood Analyzing the effects of varying hydrogen peroxide (H2O2) concentrations on the volume of its drop Jonah Jemina Introduction: Hydrogen peroxide is a clear and colourless substance that has a strong oxidizing characteristic. From the books‚ “Hydrogen Peroxide: Medical Miracle”[1995] by Douglass and “Applications of hydrogen
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EXPERIMENT 3: ISENTROPIC EXPANSION PROCESS Objective In order to demonstrate the isentropic expansion process. Introduction Isentropic means no change in entropy. Entropy is a thermodynamic property that is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work. In simple terms‚ the measure of the level of disorder in a closed but changing system‚ a system in which energy can only be transferred in one direction from an ordered state to a disordered
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The great tragedy of what we know as World War two brought great danger to lots of people‚ but to not forget of what people themselves feared most‚ concentration camps. To be more specific in this case‚ the Auschwitz camps. In its time‚ it was the most effective camp of the Nazi regime. In this place‚ it consisted of three camps‚ each with their very own deadly purposes. The reasons this camp over all was the most effective was‚ history of its building‚ the day of a prisoner in the camps as well
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The purpose of this experiment was to test the tonicity of potato cells. The potato cells were placed in different test tubes with water and were left there for 15 minutes. The percent change in mass is then used to determine if the cells lost or gained water‚ therefore determining the tonicity of the cell. Although it was a brief short time‚ the final results showed that the more water the potatoes were placed in‚ the more hypotonic the potato becomes. Tonicity is stated to be the state of a solution
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The concentration of wealth is why Western Europe never fully enveloped Marxism. In the East‚ Africa‚ and South America‚ they had wealth concentrated in the hands of a very few high classes‚ whereas in Western Europe and North America it was somewhat more spread out. In the "poor" areas‚ Marxism was seen as a way to take wealth from the elites and spread it among all the people‚ and Marxism was in most cases with the overthrow and execution of the elites. In the areas where
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pressure gradient i.e‚ in layman terms fluid is trying to flow from low pressure region to high pressure region according to Bernoulli equation. In this adverse pressure gradient‚ there is boundary layer separation‚ in simple terms‚ the fluid leaves the surface of the wall. Due to this there can be energy loss or the fluid can’t recover the pressure fully leading to head loss. So if divergent section is long that means more gradual diverging section‚ due to which the adverse pressure gradient is less
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Internal assessment on enzyme concentration Enzymes are proteins that act as catalysts and they are the most important type of protein. My aim in this experiment was to investigate the effect of enzyme concentration on the rate of an enzyme (protease) – catalyzed reaction ‚ catalysts speed up chemical reactions . My hypothesis is that the rate as reaction will increase as the concentration of protease in the solution increases so it will take less time for
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protein concentration of an unknown sample of BSA‚ and by using the standard curve. Abstract A spectrophotometer’s purpose is to use colors of the light spectrum to determine the concentration of light absorbing molecules in a solution. (p.59) In this particular lab‚ our mission was to determine the protein concentration and the standard curve of the unknown sample of BSA. This‚ by preparing five dilutions of the unknown solution of BSA together with other known concentrations‚ and then
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world is that‚ "Eskimos have more than a hundred words for snow." However‚ is this statement true? If so‚ what are they? Can we really believe everything we hear? Go to The Great Inuit Vocabulary Hoax http://www.mendosa.com/snow.html ACTIVITY 2: What’s in a Name? Geographic Place Names In China‚ Mandarin Chinese place names are often determined by their geographic location. (Most words are listed in the pinyin spellings‚ not the older Wade-Giles system) Go to Chinese Place Names http://www
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