and a neutral compound or a base and a neutral compound‚ but since the components are unknown‚ the student conducts the experiment as if all 3 compounds are present. In this particular experiment‚ the compounds are benzocaine‚ salicylic acid‚ and naphthalene. An appropriate organic solvent is used to create the ether phase. Diethyl ether is used because it has low solubility in water but will dissolve the components of the mixture (creating liquid layers)‚ is not acidic or basic‚ is less dense than
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The goal of this experiment is to determine the enthalpy of combustion of naphthalene by means of a bomb calorimeter. First‚ the bomb calorimeter was standardized using benzoic acid and the average heat capacity of the bomb calorimeter was calculated to be 10.60.3205 kJ/K. From that‚ the These results show that heats of combustions of unknown substances can be determined via bomb calorimetry. Introduction The first law of thermodynamics states that energy is conserved.2 Using that law it can
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alkyl substituted benzine) were done. We were given an unknown which we tested (Nitration‚Bromine‚ Basic oxidation) and found out that it was an aromatic unsaturated hydro carbon. Keywords: hydrocarbons‚ hexane/ cyclohexane‚ cyclohexene‚ naphthalene‚ toluene 1. Introduction This experiment aims to differentiate the different types of hydrocarbon as well as to identify the unknown through parallel chemical test. In this experiment we were expected to characterize hydrocarbons based
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increased‚ the larval motility was observed to be much slower. This might be due to the effect exerted by the latex extract. It was also observed‚ that the larvae were prolonging coiling themselves even after being exposed to the light and heat. According to Siamba‚N.D. (2008)‚ a physical change manifested as coiling is associated with the larvae response to gradual external stress. It was considered as a survival strategy aimed at conserving energy (lipid reserves) and protecting the parasite against
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Analysis of Hydrocarbons Leoncito‚ Alyssa Lynn‚ Libatique‚ Keith Martin P.‚ Ligot‚ Nestlhyn B.*‚ Lim‚ Jamie Therese T. Department of Psychology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract Four organic samples: hexane‚ cyclohexene‚ napthalene and toulene were given to serve as reference standards to characterize and distinguish four unknown given samples. Nitration‚ bromine and basic oxidation testswere conducted to classify the different samples from being an aliphatic‚ or aromatic
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that will be separated in this lab contains three components: naphthalene‚ C10H8‚ common table salt‚ NaCl‚ and sand‚ SiO2. The separation will be done according to the scheme shown on the next page and involves three basic steps: 1. Heating the mixture to sublime the naphthalene. 2. Dissolving the table salt with water to extract. 3. Evaporating water to recover dry NaCl and sand.2 Mixture: naphthalene‚ NaCl heat to naphthalene
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Sodium Acetate | Naphthalene | Mass of solid (g) | 5g | 2g | 2g | Volume of water (50mL) | 50mL | 50mL | 50mL | Volume of water & solid (mL) | 53mL | 52mL |
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Summary Page for: CHAPTER 5 ART OF ANCIENT GREECE Context: Cultural Belief System (religion) / History / Social / Political / Economic / Geographical Greek art influenced Western civilization to present / city states=democracy first evolved-also abstract reasoning‚ inquiry‚ philosophy‚ drama‚ poetry‚ & history / rugged mountainous terrain / Greeks felt themselves superior & called all other people "barbarians"/ After Persian army was repulsed Athenians established a democratic government headed
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Determining the Melting Point of a Substance Purpose The purpose of this lab is to determine the melting point of the substances naphthalene‚ biphenyl and a mixture of C. Data/Observation Sample | Melting Point Range (°C) | | Accurate trialStart Done | Naphthalene | 81 | 85 | Biphenyl | 71 | 73 | Mixture C | 42 | 56 | Questions: 1. The effect of the impurity on the mixture caused the melting point of the mixture to be lowered. 2
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Lab 2 Report- Identification of Substances by Physical Properties The purpose of this lab was to see how certain substances; Naphthalene‚ Toulene‚ and and 2 unknowns (one liquid‚ one solid) react with 3 different solvents. To identify the two unknowns‚ testing needs to be done to find the density of both the liquid and the solid‚ determine the melting point of the solid‚ and the boiling point of the liquid. The Physical Properties of Pure Substances Table can then be used to compare the observed
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