Experiment # 9: Optical Method of Analysis Use of Beer’s Law on a KMn04 Gregorio‚ Justin Edrik A. March 2013 Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila Abstract The purpose of this analytical laboratory experiment is to determine the unknown concentration of potassium permanganate (KMnO4) solution by finding its absorbance through the use of spectrophotometer. The preparation of four known concentration of KMnO4 was done namely‚ 2
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aryl group at the electrophilic trimethylcarbocation. The resulting product will be recrystallized using methanol and characterized using TLC and melting point analysis. Materials: 400-mL beaker‚ ice for ice bath‚ 25 mL Erlenmeyer flask‚ several volumetric and Pasteur pipets‚ 1.0-mL 10 x 100 mm reaction tube‚ glass stirring rod‚ rubber bulb‚ TLC plate Table 1. Chemicals used in Friedel Crafts synthesis of 1‚4-di-t-butyl-2‚5-dimethoxybenzene Substance Molecular Weight (g/mol) Amount Used Moles Used
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* 6-250 mL beakers * 1-600 mL Beaker (waste) * 50 mL graduated cylinder * 10 mL graduated cylinder * Rind Stand * Utility clamp * Stirring bar * Hot Plate * 1 L Volumetric Flask Chemicals needed: * .0500 M KOH Week 1: Prepare the solution of .0500M KOH using a volumetric flask. Determine exactly how much KOH will be needed for all titration. Once the KOH
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temperature‚ volume and time as well as how to measure the units. Students become proficient in laboratory techniques such as measuring temperature and volume and calculating within them. Procedure: I used a measuring device such as a ruler‚ balance or volumetric flask to determine the values for each measurement. DATA Tables: Data Table 1: Length measurements. Object Length (cm) Length (mm) Length (m) CD or DVD 11.95 119.5 0.1195 Key 7.62 76.2 0.0762 Spoon 17.19 171.9 0.1719 Fork 15.61 151.6 0.1516 Data
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Unit 4: Solutions and Solubility Lesson 13 Key Questions: 42. a) Cloudy pond water – Heterogenous‚ light cannot pass though‚ can see different parts. b) Apple Juice – Solution‚ organic apple particles(solute)‚ and water(solvent). c) Rainwater – Solution‚ CO2‚ hydrogen(solute)‚ and water(solvent). d) 14-karat gold in jewelry – Heterogenous‚ light cannot pass through. Just because light can’t pass through‚ doesn’t mean it’s not a solution! Gold is a solid solution – it is different metals
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SINGAPORE POLYTECHNIC School of Communication‚ Arts and Social Sciences School of Chemical & Life Sciences LC0236: Teamwork and Communication Toolbox (TCT) CA2‚ Scientific Report Brief WARNING NOTE You are reminded that plagiarism is a serious offence. Penalty will be imposed on those who reproduce another person’s work and opinions as their own without proper acknowledgement. Answers bearing striking similarities to material from textbooks/ reports or answers from students in other groups will
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Applied Heat past Examination Questions 1. An Ammonia refrigerator is to produce 2 tonne of ice per day at -4°C from water at 20°C. if the temperature range in the compressor is between 25°C and -6°C‚ Calculate horse power required to derive the compressor. Latent Heat of ice = 80 kcal/kg‚ and specific heat of ice= 0.5 2. A compressor draws 42.5 m3 of air per minute in the cylinder‚ at a pressure of 1.05 kg/cm abs. It is compressed Polytropically pV1.3=C to a pressure 4.2
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Because wheels are also mentioned in Buddhist religion‚ it can be explained as spiritual purpose as well. Since the sculpture has a schematic relation‚ it is hard to understand the main point at the first sight. The sculpture is volumetric with few high relieves. The animals and wheels can be considered as high relief where as the lion’s top portion would consider three dimensional. Overall sculpture itself is considered as free standing‚ since it can be viewed from all
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Aitkhozha Dr.Brad Logsdon Date: 22.04.13 Purpose: The main purpose of this experiment is to standardize a solution of EDTA by titration against a standard solution made from calcium carbonate‚ CaCO3. Procedure: A 50-mL buret‚ a 250-mL volumetric flask‚ and 25- and 50-mL pipets were obtained from stockroom. The 0.5 g of calcium carbonate was weighted in a small 50-mL beaker. Approximately 0.4 g of the carbonate was transferred to a 250-mL beaker. 25 mL of distilled water was poured to the
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Results and Discussion Potassium permanganate‚ KMnO4‚ is widely used as an oxidizing agent in volumetric analysis. In acid solution‚ MnO4- ion undergoes reduction to Mn2+ ion as shown in the equation: 8 H+(aq) + MnO4-(aq) + 5e- → Mn2+(aq) + 4 H2O(l). Since the MnO4- ion is violet and the Mn2+ ion is nearly colorless‚ the end point in titrations using MnO4- as the titrant can be taken as the first permanent pink color that appears in the solution being titrated.1 The number of moles of potassium
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