Investigation 3 Determine the Limiting Reagent Chemistry Investigation 3 Limiting Reagents Aim: To determine the limiting reagent in a reaction. Hypothesis: if the number of moles of the solutions added together equals the stoichiometry ratio in the balanced equation‚ then we would not expect a limiting reagent in the reaction. Independent variable: The number of moles of the reactants Dependent Variable: The limiting reagent Constant Variable: The volume of reactants added Equipment:
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recrystallization‚ gravity and suction filtration. Also the purpose of the experiment is to determine the actual‚ theoretical‚ and percent yields of product‚ and characterize the final compound by determining the number of waters of hydration by gravimetric analysis List of Observations: After adding (15 mL distilled water/5 drops of 3 M H2SO4) to ferrous ammonium sulfate hexahydrate in the 200 mL beaker‚ the solution was light green/blue After adding 25 mL of C2H2O4 to solution in beaker
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5. Human activity also impacts on waterways. Chemical monitoring and management assists in providing safe water for human use and to protect the habitats of other organisms Identify that water quality can be determined by considering: * concentrations of common ions * total dissolved solids * hardness * turbidity * acidity * dissolved oxygen and biochemical oxygen demand Water quality is commonly defined by its physical‚ chemical‚ biological and aesthetic (appearance and
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www.steelwirechina.com BRITISH STANDARD BS EN 10244-1:2009 Steel wire and wire products — Nonferrous metallic coatings on steel wire Part 1: General principles ICS 25.220.40; 77.140.65 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW www.steelwirechina.com BS EN 10244-1:2009 National foreword This British Standard is the UK implementation of EN 10244-1:2009. It supersedes BS EN 10244-1:2001 which is withdrawn. The UK participation in its preparation
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_________________________________________________________________________________________________________________________________________________________________________________________________________________________ Q2. What distinguishes gravimetric analysis from other forms of analysis? ____________________________________________________________________________________________________________________________________________________________________________ Q3. Briefly describe the process
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Biodegradation of Hydrocarbons from Crude Oil by Pseudomonas putida A Project done under the guidance of Dr. K. Bharathi Department of Biotechnology. Submitted to the faculty Of Department of Biotechnology National Institute Of Technology‚ Warangal (A.P) Submitted By Febin P. Nalpady‚ Anzal Rahman‚ Shruti Sharma‚ Sindhuja Nandiraju‚ Giraboina
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Acid –Base Titration: A volume of 128 mL of 0.650 M Ba(OH)2 was required to completely neutralize 50.0 mL of nitric acid solution (HNO3). What is the concentration of the acid solution? Gravimetric Titration: Calculate the molar concentration of Ba2+ ions in a 500.0 mL sample of an unknown aqueous solution if 2.47 g BaSO4 is formed upon the addition of excess Na2SO4? Stoichiometry of Acid –Base Reactions: What volume of 0.800 M HCl is required to completely neutralize 35.0 g of Ca(OH)2
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their pure form measure. Diagrams: Results: Weights Apparatus Weights (g) 150 Ml Beaker 77.8 Beginning Mixture 12.24 50ml Beaker 35.18 Iron Filings 4.83 CaCo3 5.09 NaCl 3.33 Filter Paper 2.04 Evaporating Basin 49.43 Discussion: Gravimetric Analysis Beginning Mixture = 12.24g CaCO3 = 5.09/12.24 x 100 = 41.6% Iron Filings = 4.83/12.24 x 100 = 39.5% NaCl =3.33/12.24 x 100 = 27.2% The procedure we undertook was not very accurate as we ended up with more than 12.24g
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Composition of Pennies Using Oxidation-Reduction and Double Displacement (Precipitation) Reactions Questions to answer to help guide the development of procedures for the determination of the percent copper and zinc in pennies through titration and gravimetric techniques: 1. What is the weight of a post 1982 penny? 2. What is the percent copper and zinc in a post 1982 penny? 3. How many grams of copper and zinc are in a post 1982 penny? 4. How many moles of copper and zinc are
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AIM: To outline what a precipitation reaction is‚ describe ways which one can predict whether a precipitation reaction would form or not‚ describe the uses of precipitation reactions in everyday activities and industries BACKGROUND INFORMATION: Precipitation is the formation of a solid in a solution during a chemical reaction‚ such as evaporation. A substance that causes precipitation when it is added to a solution is called a precipitant. This can occur when an insoluble substance is formed in
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