EXPERIMENT 5 SEPARATION OF A MIXTURE INTO ITS COMPONENTS BY FRACTIONAL CRYSTALLIZATION Introduction: Fractional crystallization is one of the experimental techniques used to separate or purify mixture. Fractional crystallization makes use of the differences of solubility to separate the components of a mixture. Goals: Applying fractional crystallization to separate a mixture of salicylic acid and copper sulfate pentahydrate into its components. Calculate the percent of salicylic
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Effect of enzyme concentration on rate of reaction Research question: is there a relationship between catalase concentration and the rate of reaction? Hypotheses: if the enzyme concentration is increased then the rate of reaction will increase. If the enzyme concentration is decreased then the rate of reaction will decrease. Controlled: temperature Independent: % catalyze concentration ( Dependent: rate of reaction (mm/s) Materials: Mortar and pestle Graduated cylinder Distilled
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ISYS104 Tutorial – week 7 Review Questions 1. What are the problems of managing data resources in a traditional file environment and how are they solved by a database management system? List and describe each of the components in the data hierarchy. Figure 6–1 shows the data hierarchy. The data hierarchy includes bits‚ bytes‚ fields‚ records‚ files‚ and databases. Data are organized in a hierarchy that starts with the bit‚ which is represented by either a 0 (off) or a 1 (on)
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Question 1 of 33 3.03/ 3.0303 Points Questions 1 through 5 are based on Lab Exercise #1: Grain Analysis. 1. Bag A contains A.well-sorted sand. B.clay. Correct C.a moderately sorted mix of sand and silt. D.a poorly sorted mix of gravel and sand. Answer Key: C Feedback: The correct answer is C. a moderately sorted mix of sand and silt. Question 2 of 33 3.03/ 3.0303 Points Bag B contains Correct A.well-sorted sand. B.clay. C.a poorly sorted
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(60 pts.). Week 4 in Drop box 03/31/2013. 11:59 pm Annotated Bibliography List and summary of at least five sources (100 pts.). Week 5 in Drop box 04/07/2013. 11:59 pm First Draft of Research Paper Draft of first three sections of final paper‚ including introduction‚ thesis statement‚ and problem section (60 pts.). Week 6 in Drop box 04/14/2013. 11:59 pm Second Draft of Research Paper Draft of final three sections of final paper‚ including solution and call to action sections Week Discussion
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into your lab document. Task 2 – Run the Discrete Event Simulation * Use <Alt><PrtSc> to capture a copy of the Simulation Execution dialog shown below and paste it into your lab document. Task 3 – Analyze the WLAN and WAP DES Results * Under Global Statistics for the Wireless LAN‚ select Delay and Throughput. Make sure that the presentation is set to Stacked Statistics. Use <Alt><PtrSc> to capture this DES Graphs window and paste it into your lab document.
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Purpose: To observe epithelial tissue by using a microscope to compare prepared slides. Introduction: Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers. This tissue is specialized to form the covering or lining of all internal and external body surfaces. Epithelial tissue can be divided into two groups depending on the number of layers of which it is composes. Epithelial tissue which is only one cell thick is known as
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Synthesis of Butyl Benzoate Using Phase Transfer Catalysis The objective of the experiment is to synthesize the butly benzoate by nucleophilic substitution and characterize it by IR spectroscopy. The percent yield of the final product is determined after the synthesis. Procedures: 2.0 mL of 1-bromobutane‚ 3.0 g of sodium benzoate‚ 5.0 mL of water‚ 4 drops of Aliquat 336‚ and a boiling stone were placed in a 50mL round-bottomed flask. The reaction mixture was refluxed for 1 hour and the flask
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CHM 3411 – Problem Set 6 Due date: Wednesday‚ March 23rd. Do all of the following problems. Show your work. 1) Consider the cyclic molecule C8H8‚ the eight carbon analogue to benzene. a) Write the secular detrerminant corresponding to the pi-bonding in C8H8. b) Using the secular determinant‚ the following energies are found for the pi-bonding molecular orbitals: 1 = + 2 2 = + 1.41 (two states) 3 = (two states) 4 = - 1.41 (two states) 5 = - 2 Give the electron
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Introduction: During this laboratory exercise will identify by the graph given which is isotonic‚ hypotonic‚ or hypertonic. The kidneys are a pair of fist-sized organs located outside the peritoneal cavity on each side of the spine. The kidney is a highly specialized organ that maintains the internal environment of the body by selectively excreting or retaining various substances according to specific body needs. The process of urine formation and adjustment of blood composition involves three
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