First‚ the buffer was prepared by using the formula as follows: Figure 1: Calculation for prepare 0.1 M potassium phosphate buffer at pH 6 3.4007g of potassium phosphate was weighed and placed in 300 mL beaker. Then‚ 125 mL of water was added into the beaker that contained potassium phosphate. The mixture was dissolved using the stirring rod‚ and then the magnetic stirring bar was placed in the beaker for further dissolve when measuring the pH. The pH meter was used to measure the solution
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1. Determining the concentration of KMnO4 from the solution created by the stockroom. 16H+ + 2MnO4- (aq) + 5C2O42- (aq) → 2Mn2+ (aq) + 10CO2 (g) + 8H2O (l) Volume of potassium manganate (KMnO4) = 32.5 mL Mass of Sodium Oxalate (NaC2O4): 0.104 [KMnO4] Calculation: = (0.104g of NaC2O4)(1 mol NaC2O4 /134.0g)(2 mol KMnO4 / 5 mol NaC2O4)(1/32.5 mL)(1000 mL /1L) = 0.00955 M KMnO4 2. Using the standardized concentration of KMnO4 calculated above to find the mass percentage of the oxalate ion Equation:
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Experiment 1 Calorimetry Chem 17 Univerity of the Philippines Diliman Discussion All chemical reactions involve energy. By understanding the behavior and connection of energy flow within a chemical reaction‚ we can understand and manipulate them to our advantage. The most common form of energy observed during chemical reactions is heat. The reaction may absorb (endothermic) or release (exothermic) heat‚ depending on the reacting substances. Calorimetry is the process of measuring the heat flow
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Case: The Scanning and Planning Internship Debbie Clare is aiming for internship in one of the most known electronics company‚ the Dynamic World ( DWC ) . Fortunately she was invited by Tom Tucker to lead a team consists of 5 members. These members are outstanding students from different excellent schools namely the Arizona State‚ Ohio State‚ Tennessee‚ MIT and Wharton. The main agenda of the team is to perform environmental scanning which will be used to create strategic supply chain road maps
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A Tale of Two Coaches Kermetris T. Hill Grand Canyon University: LDR 600 01/14/2013 A TALE OF TWO COACHES Katz (1955) suggests that three basic administrative needs must be present for managers to be effective technical‚ human‚ and conceptual. These three basic needs can also be a sign of positive leadership. Coach Bob Knight and Coach Mike Krzyzewski definitely possess these administrative needs and many more. Of the three basic administrative needs I think that the most apparent
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In order to describe the molar volume of pure water the equation V_3=M_3⁄ρ_(3 ) is used‚ whereas those of sodium nitrate and the polyether compound poly(ethylene glycol) (PEG) are shown by V_1=V_(∅_1)^∞and V_1=V_(∅_2)^∞. In these two equations‚ V_(∅_1)^∞ and V_(∅_2)^∞ which are the apparent molar volumes at infinite dilution of sodium nitrate and poly(ethylene glycol)‚ must be computed on the basis of data on apparent molal volume (V_∅). The following equation shows the relation of the V_∅ of a
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Experiment 11 Calorimetry and Hess’s Law Purpose- To determine the change in enthalpy for four reactions using calorimetry and Hess’s Law Procedures: A. Calibration of the Calorimeter 1. Obtain two copper cylinders and a Styrofoam cup with lid from your lab instructor. Check out a digital thermometer display from the storeroom window. 2. Set up a hot water bath using a 600mL beaker‚ ring stand‚ and Bunsen burner. Weigh the two copper cylinders
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Abstract Environmental scanning is the first portion to an organization’s strategic management and is very important to the corporation. Environmental scanning is gathering information for the external and the internal of the company. A SWOTT is the best way to gather the information. A SWOTT is determining the strengths‚ the weaknesses‚ the opportunities‚ the threats‚ and the trends of the organization. Starbucks is a coffee shop that sets out to be different from the competitors. The company does
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Chapter 5: Scanning Marketing Environment Analyzing needs and trends in the Macroenviroment Trends ▫ is a directional or sequence of events that some have momentum and durability. ▫ Has longevity‚ is observable across several market areas and consumer activities and is consistent with other significant indicators occurring or emerging at the same time(Faith Popcorn) Faith Popcorn points to 16 Trends in the Economy 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Anchoring Being Alive Cashing Out Clanning
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First hand investigation of the Dissolution of Solutes Background Information Molar heat of solution * The molar heat of solution of a substance is the heat absorbed when one mole of the substance dissolves in a large excess of water. It is expressed in kJ/mol. * The specific heat of water is a constant‚ with a value of 4.18 J/ g*oC. AIM: To determine the molar heat of solution for two different solids Equipment: * A calorimeter (made using 2 Styrofoam cups with a cardboard lid)
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