DETERMINATION OF EMPIRICAL FORMULA OF MAGNESIUM OXIDE Objective: The objective of this lab is to experimentally determine the empirical formula of Magnesium Oxide. Equipment: • Ring Stand • 5 inch ring • wire gauze • Crucible and Crucible lid • Butane burner • Magnesium • Crucible tongs • Safety glasses • Gloves Experimental Procedure 1. Setup ring stand with five inch ring and triangle. 2. Obtain desired amount of Magnesium‚ a crucible with a lid and
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Basic Terms • forensic (adj) 1. pertaining to‚ connected with‚ or used in court of law or public discussion and debate 2. adapted or suited to argumentation; rhetorical Forensic Chemistry • Forensic science (n.) – the application of science to criminal and civil laws. – Emphasizes the application of science to criminal and civil laws that are enforced by police agencies in a criminal justice system. • Adversarial system – owes its origins to individuals such as Bertillon‚ Galton‚ Lattes
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discussions with my lab team. “ Signed_________________________________________ Abstract A common road salt‚ magnesium chloride‚ was analyzed in the lab to test its effectiveness as a road salt. The Van’t Hoff factor of the salt and the enthalpy of dissolution when dissolved in pure water were experimentally tested to evaluate its many characteristics as a deicer. To determine the Van’t Hoff factor‚ the difference of temperatures of freezing water and a solution of magnesium chloride was determined
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for the difference between this value and your calculated value in (a)(ii).[1] 2. . a) Define the term standard enthalpy of combustion. [3] b) Write an equation for the complete combustion of ethanol‚ C2H5OH [1] c) The following table gives some standard enthalpies of formation. [pic] Use these data to calculate a value for the enthalpy of combustion‚∆Hc ‚ ofpropan-1-ol‚ C3H7OH C3H7OH(l) + 4 O2(g) → 3CO2(g) + 4H2O(l) [3] d) State how you would expect the value obtained in
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Unit 1 Assignment: Critical Terms Study Guide FS101: Fire Behavior and Combustion Unit 1 Unit 1 Assignment: Critical Terms Study Guide Auto-ignition temperature The minimum temperature to which a material must be raised before combustion will occur. Also called “ignition temperature.” Backdraft A sudden‚ violent reignition of the contents of a closed container fire that has consumed the oxygen within the space when a new source of oxygen is introduced. The introduction of
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temperature and pH‚ involved in proteins and DNA solvent: liquid substance solute: dissolving substance dehydration synthesis: using water to build molecules hydrolysis: using water to break down molecules heat capacity: ability to absorb or retain heat (reactions give off heat) pH scale: 1 (acidic) - 2 - 3 - 4 - 5 - 6 - 7 (water) - 8 - 9 - 10 - 11 - 12 - 13 - 14 (alkaline) human body range: 7.2-7.4 Biological molecules (organic molecules) Carbohydrates: easily used and best source
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Morcilla‚ Ma Dame Ametrini T. MT11213 Chem 24 Prof. Zenaida Bacsafra COLLAGEN Collagen is a protein found abundantly throughout the bodies of animals‚ including humans. It is a very variable protein‚ forming the basis of many connective and support tissues. It is a fibrous structural protein‚ with a distinctive structure. In fact‚ collagen makes up about one-third of the total body weight. Its name is derived from the French word for glue. Collagen fibers‚ which resemble microscopic
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main purpose of the experiment is to investigate heat transfer processes using the tubular heat exchanger which is a specific type of heat exchangers. Moreover‚ the primary goals are to compare the two types of flow cases‚ co-current flow and countercurrent flow as well as taking the analyses of their temperature changes through the graphical curves and observing the heat transmission via the operating apparatus. The working principles of the tubular heat exchanger is analyzed and the fluid temperate
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Combustion of Alcohols THE COMBUSTION OF ALCOHOLS PROBLEM Investigate the heat energy in a range of alcohol’s used as fuels. HYPOTHESIS I predict that octanol will release the most heat energy. This is because there is more bond energy in that molecule than the other alcohols. Within a molecule there are bond energies that are holding the atoms together. When the fuel combusts a chemical reaction takes place‚ this breaks the bonds‚ this requires energy‚ and makes new bonds this gives out energy
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Calorimetry and Specific Heat Tessa Williams Chemistry 111 11/13/13 Abstract: In this experiment‚ the specific heat and the density of an unknown metal was determined in order to identify the unknown metal. The average specific heat of the unknown metal was 0.197˚C and was determined using a calorimeter. The density of the unknown metal was 6.57 g/mL and was determined using a cylinder and displacement. Using the specific heat value of the unknown metal and its density‚ it
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