Determination of nitrite and phosphate Mech-1103 assignment 2 C.SUNGKUR 10/20/2016 STUDENT ID: 1615715 Faculty of engineering Title: Determination of concentration for unknown solutions of nitrite and phosphate. Author: C. SUNGKUR Student id: 1615715 Date of submission: 20/10/2016 Submitted to: Mr. Y.SEECHURN ABSTRACT When primary aromatic amine and nitrous acid react together‚ it results in a diazonium compound and this process is called diazotization
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Evaluation of procedures: |Precision |The precision of each of the measurements you made is indicated by the % uncertainty calculated. | |Accuracy |The accuracy of an overall result (concentration of acid) means how close it is to the ‘true’ value. | | |It is possible to make very precise measurements but still end up with an inaccurate result because of a weakness | |
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Michelle Olson Lab report 4/25/14 Percent of Cu in a post 1982 cent PURPOSE: What is the experimental % of copper (Cu) in a post 1982 cent? In this lab‚ we will determine the % composition of a modern (post-1982) penny by using a strong acid called nitric acid (HNO3)‚ to react and dissolve the zinc core‚ leaving only the copper coating. Once only copper remains‚ we will then compare its’ absorbency to the other five post-1982 penny Cu concentrations made in this lab. INTRODUCTION:
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Laboratory Testing Routine laboratory screening for suspected prosthetic joint infection in the setting of a painful THA includes a complete blood count with differential‚ C-reactive protein level (normal‚ 4200 cells/µL and neutrophil differential of >80% is highly suggestive for chronic infection about a THA [16]. Additionally‚ the onset of symptoms in relation to the primary operation can help identify the causative organism. Early (12 months) infections are commonly due to staphylococcus aureus
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for the HCl make the -OH from the 2-methyl-2-butanol into a good leaving group because H2O is formed. The H2O leaves and Cl- is free to bond with the carbocation creating 2-chloride-2-methylbutane. The materials needed for the lab were an Erlenmeyer flask with a stir bar‚ the stirring function of the hot plate‚ an ice bath‚ a separatory funnel‚ and an IR machine. Experimental Measured out 5 mL of 2-methyl-2-butanol and 13 mL of HCl‚ the latter was cooled to approximately 0℃. The HCl was slowly added
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7. 50ml Volumetric flask × 4 Part two Method 1. Using a Methyl orange solution of 40ppm prepare 4 volumetric flasks containing methyl orange 2ppm‚ 4ppm‚ 6ppm‚ 8ppm. 2. To do this I used a pipette filler and pipette to measure out the amount of methyl orange I needed . 2.5mls = 2ppm‚ 5.0mls = 4ppm‚ 7.5mls = 6ppm & 10mls = 8ppm 3. After I measured out my methyl orange I diluted each with deionised water up to the calibration mark on the volumetric flask. 4. I then poured
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Introduction Objectives Validate the Beer-Lambert law for KMnO4. To determine the pKa for an acid-base indicator To estimate the equilibrium constant for the formation of complex ion Fe(NSC)²ꭞ The function of part two of the experiment is to find the value of the constant K‚ in the following equilibrium constant: K=[Fe (NSC) ²⁺]/ [Feᶟ⁺] [NCS⁻]‚ while not disrupting the equilibrium. Theory For part one. The majority of chemical compounds are known to absorb UV or visible light. Depending
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Extraction of Caffeine from Lipton Yellow Label Teal Leaves Arlie Bamiano‚ Jealine Bernabe‚ Petrenne Caimbon*‚ Jhia Caso Department of Biology‚ University of Santo Tomas Abstract In order to extract pure caffeine from Lipton Yellow Label tea leaves‚ several extractions and phase transition techniques were employed to 6.5029 grams of sample. Initially‚ the tea leaves were boiled in water to extract tea from the leaves (Solid-Liquid Extraction). After extracting the tea‚ several steps of
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of the knowledge bank of individuals and then sharing that information with all of the employees within the organization proved to be one of the key components that distinguished Buckman Laboratories from its competition. However‚ in a market where knowledge management systems are more common‚ Buckman Laboratories will need to find a way to remain competitive. One way to achieve this would be to expand the function of the K’Netix system. In addition to being a knowledge sharing portal between all
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was added to the dichloromethane. A stopper was placed on the separatory funnel and was shaken and pressure was frequently released. The 2 liquids separated into clear layers and the lower layer (dichloromethane layer) was tapped into an Erlenmeyer flask. The aqueous layer was placed into a 400 ml beaker. The dichloromethane was placed back in the separatory funnel. 3. The dichloromethane was extracted with 2 more fresh portions of sodium bicarbonate solution. The bicarbonate solutions are combined
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