Eggshell Lab Lab Set-Up: Materials: * pipette with pipette bulb * conical flask * 1 beaker * 1 molar sodium hydroxide solution * 2 molar hydrochloric acid solution * 1 funnel * 1 piece circular filter paper * crushed poultry eggshell * crushed farm eggshell * phenolphthalein * Distilled water * White tile * Paper tray * burette in burette stand * electronic scale Procedure: Step 1: Standardization of the NaOH solution using
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Lab 2: Equipotential Lines and Lines Of Force Purpose: The purpose of this lab is to find the electric current when passing through conductors of different shapes and sizes. Also to gain a general knowledge of the laws governing the flow of current through extended conductors is another objective for this experiment. In this lab we are to experiment with the lines of force and equipotentials. We are also to find out vector field and the relationship between the lines of force and the electric field
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catalase works to break down hydrogen peroxide. If the pH‚ temperature‚ or enzyme concentration changes‚ then the reaction rate of catalase will either speed up or slow down. III. Materials and Procedures Materials needed include 1 molar HCl solution‚ 1 molar NaOH solution‚ 6 test tubes‚ measuring pipette‚ 10ml graduated cylinder‚ 40 ml 3% hydrogen peroxide solution‚ straightedged razor blade‚ scissors‚ forceps‚ stirring rod‚ fresh liver‚ fresh apple‚ fresh potato‚ test tube holders‚ ice bath‚ warm water
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ID: 200550284 2. Name: Duaa Tabarak ID: 200553858 3. Name: Mariam Rustom ID: 200552242 Date of experiment: 31st March‚ 2010 Date of submission: 11th April‚ 2010 Grades: Report presentation………………………………………… /15 Abstract and Objective(s)……………………………………/10 Introduction and Theory ……………………………………/10 Raw data………………………………………………………/05 Data Processing and calculations……………………………/20 Results and Discussion ………………………………………/25 Conclusions and Recommendations……………………….. /10 References …………………………………………………
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Since the Grignard reagent can easily react with water‚ all glassware including the 25 ml round bottom flask‚ magnetic stir bar‚ 3 and 5 ml conical vial‚ 50 mL Erlenmeyer flask‚ claisen adapter‚ drying tube and 5 glass pasteur pipets were first added to a 250mL beaker and placed in the oven for 30 minutes. After the completion of the thirty minutes‚ 0.150 g of shiny magnesium turnings and a stir bar was first added to the round bottom flask and the claisen adapter along with the drying tube packed
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of the mixture in methylene chloride in a centrifugal tube 2) Set up the separatory funnel. 3) In order to extract the benzoic acid add 5.0 ml of the 1 mol NaOH solution‚ then shake the funnel 1 time per second and open it while it is upside down to allow the pressure out. 4) Allow the solution to settle. 5) The NaOH layer will extract the benzoic acid . 6) Perform a second extraction on methylene chloride repeat the steps from 2-6. 7) Add
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Replacement Reactions Lab Pre-Lab 1. If a solid‚ a gas or a weakly ionizing compound such as H2O formed‚ then a reaction has occurred. 2. The formation of a solid‚ the formation of a gas and the formation of a weakly ionizing compound are the driving forces that control a double replacement reaction. 3. a. Balanced equation: CaCl2 (aq) + NaPO4 (aq) Ca3(PO4)2 (s) + 6NaCl (aq) Ionic equation: 3Ca2+(aq) + 6Cl-(aq) + 6Na+(aq) + 2PO43- (aq) Ca3(PO4)2 (s) + 6Na+ (aq) + 6Cl-
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The Role of Law LAW/421 August 6‚ 2012 Michael S. Green The Role of Law Laws are “the body of rules or principles‚ prescribed by authority or established by custom‚ that a state‚ community‚ society‚ or other group recognizes as binding on its members” (Ferguson Publishing‚ 1999‚ p. 105). The purposes of laws are to maintain peace and order‚ to define the rights of citizens‚ to secure justice‚ to harmonize conflicting interests‚ and to provide means for punishing wrongdoers. Laws are applied
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Vinegar Titration Lab Procedure: 1.) Obtain ~100 mL of NaOH. Record the molarity on the data table. 2.) Set up a ring stand with a buret. 3.) Place 5mL of vinegar in a 125 mL Erlenmeyer flask. Dilute the vinegar with 25 mL of water and add two drops of phenolphthalein. 4.) Fill the buret with NaOH. Record the initial volume of the buret in your data table. 5.) Titrate the vinegar sample until the first faint pink color does not disappear. 6.) Record the final volume of the buret in your data
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Procedures: In the first lab‚ seven test tubes were attained and six of them were filled with the solutions that were listed (Na Pyruvate‚ MgSO4‚ NaF‚ Glucose‚ Water‚ and yeast suspension). The last test tube was filled with water. After they were filled with the solutions they were incubated at 37 degrees Celsius for about forty minutes. After the forty minutes passed take the test tubes and measure the height of the bubbles that formed in millimeters. For the second lab‚ attain three beakers‚
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