In the lab testing the heat of a reaction to understand changes in enthalpy in an exothermic reaction‚ the group hypothesized that if the amount of reactant is changed then the amount of heat produced (exothermic) will increase. This hypothesis was supported through the data as each of the six trials produced heat and the larger the piece of magnesium the larger the change in heat was. In the first trial the group had .085 grams of Mg and after being placed in 3 ml of 21.8℃ HCl the temperature of
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Department of Chemistry Observations of Chemical Changes Submitted by Date Submitted: 5/30/2012 Date Performed: 5/30/2012 Lab Section: Chem-181DL1 Course Instructor: Purpose The purpose of the experiment Observation of Chemical Changes is to examine the properties of chemical reaction and relate those reactions to products commonly found in a home environment. Through this experiment someone can macroscopically analyze whether a solution
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Reaction Paper: Forgiveness and Empathy The ability to be empathetic toward others and forgive is without a doubt essential to relationships between people. Loren Toussaint and Jon R. Webb ’s study "Gender Differences in the Relationship Between Empathy and Forgiveness" gives some insight into how gender may influence the frequency in the use of empathy and forgiveness. From the data collected from the study their also seemed to be a difference in the way empathy is linked to forgiveness in men
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Abstract This experiment is to study the effect of temperature on the rate of reaction between potassium permanganate with oxalic acid. We used 2cm3 of 0.02M potassium permanganate and 4cm3 of 1M sulphuric acid into a test tube. In another test tube‚ we placed 2cm3 of oxalic acid. We placed the test tubes in a water bath at 40‚ 45‚ 50‚ 55 and 60oC respectively. When the solutions have attained these temperatures pour the oxalic acid into the acidified permanganate solution and recorded the time
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REACTIONS OF HYDROCARBONS Vanessa P. Manibpel De La Salle University - Dasmariñas ABSTRACT Five substances namely Hexane‚ Eugenol‚ Unknown hydrocarbon 1‚ Unknown hydrocarbon 2‚ and Acetylene gas was used for the selective reactivity of hydrocarbons to functional group tests; Bayer’s test‚ Bromine test light‚ Bromine test dark‚ and Tollen’s test. In Bayer’s test‚ only Acetylene‚ Eugenol and Unknown hydrocarbon 2 reacted positively and the rest retain the purplish color of KMnO4. On the other hand
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Chemical Reactions Chemical reactions happen in almost everything around us. Reactions are very important in everyday life‚ and science. Chemical reactions are the changing of substances to other substances by the breaking of bonds in reactants and the formation of new bonds in products. There are different types of chemical reactions such as combination reaction‚ decomposition reaction‚ single-replacement reaction‚ double-replacement reaction‚ and combustion reaction. Combination
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The events of Tiananmen Square in 1989 present the struggle between continuity and change through the clashing ideals of the Communist party and the civilians‚ especially the students‚ of China. The students‚ who leaned towards western ideals‚ demanded for political and economic reform that would ultimately lead to a more democratic and free society. They also campaigned against corruption‚ and this resulted in much support from the working class who had been exploited by the government. The westernised
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and Processing Raw data Table of raw data Qualitative observation: At the start of the experiment‚ the crystals were blue. During the heating‚ the crystals turned white which means that they lost their water molecules. The source of hydrated copper sulphate consists of both small grains and large grains of the salt. Therefore during the heating process‚ the smaller grains of the hydrated salt turned from blue to white in just 1 minute. In other words‚ there is an uneven heat distribution‚ which
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Chemical Reactions Drew Selfridge Dave Allen‚ Lab partner Instructor Yang February 11‚ 1997 INTRODUCTION This experiment was to recover the most amount of copper after it is subjected to a sequence of reactions. The copper is originally in solid form‚ but the reactions will turn it into free Cu+2 ions floating in solution. The ions will then be regrouped to form solid copper once again. During this process‚ however‚ some of the Cu+2 ions may be lost. The copper will subjected to changes in pH
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Case Study Copper Kettle Catering A. Synopsis Copper Kettle Catering is a full service catering company that was established in 1972. They have subsequently grown to be one of the largest catering businesses in North Carolina. They have two different types of customer demands. They have a “delivery only” side of the business which focuses on preparing and delivering same day box lunches with a limited menu. The demand for this service remains fairly constant throughout the year. They also have
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