can picture how coffee gets extracted. The flavors‚ molecules‚ caffeine‚ etc. are extracted from the coffee beans. In this experiment‚ a solution was extracted containing a known amount of benzoic acid in water with methylene chloride‚ an organic solvent. The amount of leftover acid was determined through the titration of the aqueous‚ not the organic‚ solution with basic NaOH. This allowed the student to calculate and determine the Kd value of both multiple and single extractions. The efficiencies
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Hector Buenrostro Alexys Tran Edgar Contreras Daniel Rodríguez 5th period 9 September 2013 The Mystery Powder Lab Report Introduction: One morning Ms. Mandell woke up to find a weird type of matter. It was a wired heterogeneous mixture we could tell where the solvent and solute separated. She has no idea what it is so she brought the sample to class to show us. The purpose of the lab is for us to try and figure out what makes up this heterogeneous mixture‚ by making observations on
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P.Jayas (PGT Chem.‚ K.V.No. 2 Chakeri) Technical Support Mr. Padam Pandey (PGT. C.S. Contractual K.V.No.2 AFS Chakeri) CONTENTS ONE PAPER UNIT NO. I II III IV V VI VII VIII IX X XI XII XIII XIV XV XVI 70 MARKS TITLE SOLID STATE SOLUTIONS ELECTROCHEMISTRY CHEMICAL KINETICS SURFACE CHEMISTRY GENERAL PRINCIPALES AND PROCESSES OF ISOLATION OF ELEMENTS P-BLOCK ELEMENTS D & F BLOCK ELEMENTS COORDINATION COMPOUNDS HALOALKANES & HALORENES ALCOHALS‚ PHENOLS & ETHERS ALDEHYDES‚ KETONES & CARBOXYLIC
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Experiment 7: Analysis of an Unknown Chloride Objectives Experimental The objective of this experiment was to identify the molarity of a solution of chloride. Laboratory In lab we had to perform titrations and carefully read the burets. Data and Calculations: Analysis of Unknown Chloride Molarity of Standard AgNo3 solution 0.02785M I II III Initial buret reading 0.00 mL 0.00 mL 0.10 mL Final buret reading 17.00 mL
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law pAi=HACAi and the reaction rate equation given above‚ to eliminate the pressure and concentration at the interface (pAi and CAi) and to prove that the final rate expression for the overall rate of the process is -rA=pA1kAga+HAkAla+HAkCB Solution -rA=kAga(pA-pAi) (1) -rA=kAlaCAi-CA‚ (2) pAi=HACAi (3) -rA=kCACB (4) From (1) -rA=kAgapA-pAi=kAgapA-kAgapAi -rA=kAgapA-kAgapAi=kAgapA-kAgaHACAi (5) From (2) if we solve for CAi -rA=kAlaCAi-kAlaCA and CAi=-rA+kAlaCAkAla (6)
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|readily soluble | After looking at the solubility of impure acetanilide in the four solvents‚ water seems to be the best choice as a recrystallizing solvent. B. DECOLORIZING A SOLUTION OF IMPURE ACETANILIDE AND HOT FILTRATION 2. 1.5637 grams of impure acetanilide 5. 38 ml total solvent volume 7. Added tip of carbon black to mixture and mixture almost boiled over! 8. 28 ml total solvent volume C. ISOLATING THE RECRYSTALLIZED
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was used was the one that had the most consist numbers. What this means is that isotonic urine flow subject is not necessarily isotonic creatinine concentration subject. The kidney’s load for this was either a hypotonic‚ isotonic‚ alkalotic‚ or no solution at all. Based on the data above‚ some hypothesis were validated and other were not. In both the hypotonic and isotonic‚ the urine flow of the subjects increased as expected. This was due to the volume of water that the subjects had to drink. The
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Heterogeneous mixture is one that is not uniform in composition. Meaning that the chemical make up of the mixture is not the same. A Homogeneous mixture is one that is completely uniform in composition‚ meaning that the whole chemical makeup is the same. Solutions may be gases solids or liquids. Some mixtures can be separated into their components by simple physical methods. One method is called distillation. A liquid is boiled to produce a vapor that is condensed again to a liquid. Using this method lets
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tubings with 10 ml of the given substances accurately. Next‚ once the substances have been put into the tubes‚ with two finger‚ smooth the end of the tubing sso to release the excess air. Once that is done‚ proceed to clamp the other side encasing the solution. Make sure no leaks are present. Next‚ the team will proceed by placing each distinct dialysis tubing into the 6 beakers with distilled water before. Make sure the beakers and everything is labeled accordingly so no confusion is possible‚ as so:
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Crossing Brooklyn Ferry Whitman’s poem “Crossing Brooklyn Ferry” seeks to determine the relationship of human beings to one another across time and space. Whitman wonders what he means (not as a poet but as another anonymous individual) to the crowds of strangers he sees every day. In stanza 3 the speaker says‚ “I am with you‚ you men and women of a generation‚ or ever so many/ generations hence”. He assumes that they see the same things he does‚ and that they react in the same way‚ and that
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