Laboratory Work

Abstract The purpose of this experiment was to find out how a reaction undergoes for a globally known painkiller called aspirin, and to become familiar with achieving successful yields. Aspirin Is synthesized from salicylic acid and acetic anhydride. Those two chemicals are mixed together along with sulfuric acid to form a crude solid. Filtration is […]

Aim: To calculate the enthalpy change of naturalization of the given pairs of acid and base. Theory: When alkali neutralizes an acid. A salt and water are formed. Aqueous hydrogen Ions, from the acid react with the hydroxide ions, OH-(as) from the alkali, forming water. Ionic equation: H+ (as)+OH- (as) -9 H2O (l) The Identity […]

Introduction A Voltaic Cell (also known as a Galvanic Cell) is an electrochemical cell that uses spontaneous redo reactions to generate electricity. It consists of two separate half-cells. A half-cell is composed of an electrode (a strip of metal, M) within a solution containing Mn+ ions in which M is any arbitrary metal. The two […]

Effect of caffeine on Daphnia (Water fleas) Introduction- In this study I am going to investigate the effect of caffeine on Daphnia (water fleas) heart rate. I shall use daphnia as they would never have been exposed to caffeine before, unlike a human, who may have already developed a high tolerance to it. Another reason […]

AIMS The aim of this experiment was to investigate the effect of temperature rise on the rate of transpiration of a plant (hibiscus) by measuring the plant’s water uptake in a period of time. HYPOTHESIS Transpiration is the process by which plants loses water to the atmosphere from their leaves. Water in the plant is […]

When sodium bicarbonate and clerk acid mix In water they dissolve, the sodium bicarbonate reacts with the clerk acid to form sodium citrate and carbon dioxide. The carbon dioxide then bubbles out as a gas, which makes the bath bomb break up, In this experiment 3 tests will be conducted In order to find the […]

Metal Zinc Blobbing Magnesium Fizzing Bubbling Iron Copper Reactions with Indicators Speed of Reactions With Metals Observations continued: In my observations, in data table 1, the only solution that reacted with the red litmus paper was Noah. All three solutions reacted with the blue litmus paper; HCI and HACHURE turned the blue litmus paper red, […]

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The determination of calcium carbonate present in the Eggshells. Introduction: The Major component of eggshells is calcium carbonate (CaCO3). This analysis will be done volumetrically by using a characteristic reaction of carbonate compounds, namely their reaction with acids. Calcium carbonate (limestone) is very insoluble in pure water but will readily dissolve in acid according to […]

The Rolling Choice A pillbug also known as a roly-poly is a small land creature that is often found in many areas around the world. They prefer moist areas often living in soil, under rocks, and dead logs. The pillbug which is an isopod begins its life as a tiny egg and as it grows […]

Complete a close analysis of a TV studio produced show or segment that includes a studio-based interview. Identify and discuss the format and production elements used to execute a studio-based interview. Michael Parkinson made his debut as a talk show host with his own Parkinson show in 1971. After being on air for 25 years […]

To be off: significa estar libre o irse. Fortunately, I’m off today, so i don’t have to work Be all ears: significa ser todo oido When the lady raised her hand to participate during the class, I told her that I was all ears, so she could start talking.  To be broke: estar palmado (sin […]

Abstract This experiment aimed to monitor the efficacy of the Barley Amylase Enzyme in breaking down starch in solutions with increasing neutral pH levels. The experiment involved simultaneously mixing tubes containing a reaction solution of Amylase enzyme and starch. The reactions were then stopped using I2-KI at two-minute intervals. To ensure accuracy, each trial was […]

Intro I am going to do an investigation into what concentration of sucrose solution would cause “Incipient Plasmolysis”. Theory Plasmolysis is the result of a (in particular) plant cell which has lost vast amounts of water. When this happens, turgor pressure within the cell has decreased to the point where the cytoplasm of the cell […]

CONRAIL CASE Question  Based on the information provided in the “A” case and especially in Exhibit 7 the most that CSX should pay for Conrail should be $93. 42 per share (calculations are attached hereto as Exhibit 1). I assumed that the correct or required discount rate to be used in the DCF analysis should […]

British Airways – Operational Environmental Introduction British Airways (BA) is the UK’s largest international scheduled airline, currently flying to over 550 destinations. The British Airways group consists of British Airways Plc and a number of subsidiary companies including, among others, International Aeradio, British Airways Helicopters serving mainly the North Sea oil rigs and British Airways […]

The development of dyes to stain microorganisms was a significant advance in microbiology. Stains serve purposes such as it differentiate microorganisms from their surrounding environment and it allows detailed observation of microbial structures at high magnification. (http://insist. Back. Wise. Deed/, 0 2006-2013 Microbiology Laboratories) Sexagenarians (2005) defined staining as the method of artificially producing color […]

A phase transfer catalyst or PTC in chemistry is a catalyst that facilitates the migration of a reactant in a heterogeneous system from one phase into another phase where reaction can take place. Ionic reactants are often soluble in an aqueous phase but insoluble in an organic phase unless the phase transfer catalyst is present. […]

The question “Which is heavier, a pound of feathers or a pound of lead?” emphasizes that both feathers and lead have the same weight of one pound. Nevertheless, there is a distinct contrast between a small piece of lead and a large bag of feathers despite their equal weight. This dissimilarity can be clarified by […]

Abstract: One is to determine the gap energy of cadmium sulfide semiconductor thin film using the equation: Eg = h.c/ is the signal of the long wavelength limit of the absorption peaks (measured in the lab). The reaction between cadmium sulfide and NH3, in the presents of thiourea yield a ? of 579(nm). The  error […]

Market opportunity in Germany: – forecasting methods – anology Analogy: use similar situations: the launch in Holland, France and England. Total german elevator market: Target sales: 70 per cent of all sales: 70 per cent of 86,9 mill. Is 60,83 mill.DM. Perhaps a bit more if they gain in market share due to monospace. Low […]

Introduction A multitude of global research has been conducted on the hijab, focusing primarily on adult women and their decision to wear this headscarf. These studies have utilized various methods such as surveys, interviews, questionnaires, and observations. Katherine Bullock, a Canadian community activist, writer, and lecturer, conducted extensive research on the hijab. She published her […]