Experiment IV Solubility of Dissolved Oxygen Purpose To demonstrate the effect of partial pressure‚ temperature and salinity on the solubility of dissolved oxygen and to demonstrate the interference of nitrite in dissolved oxygen analysis by the Winkler Method. To demonstrate the use of the oxygen electrode and the difference between activity and concentration. References 1. Mancy‚ K. H.‚ Jaffe‚ T.‚ "Analysis of Dissolved Oxygen in Natural and Waste Water‚" USDHEW Public Health Service
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A process for the preparation of racemic phenylethylamine which comprises contacting an optical antipode therefore‚ e.g.‚ L(-) or D(+)-1-phenylethylamine with sodium amide or sodium hydride. Claim: What is claimed is: 1. A process for preparing racemic 1-phenylethylamine which comprises contacting L(-)-1-phenylethylamine or D(+)-1-phenylethylamine with 0.01 to 1 weight percent‚ based on theamount of said phenylethylamine‚ of sodium amide or sodium hydride at a temperature of 70.degree. to 150
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Chemistry 1. Explain why 0-nitrophenol has a lower boiling point than p-nitrophenol? 2. Why alkali metals used in photoelectric cells? 3. Due to which compound‚ ozone depletion is caused in Antarctica? 4. Which of the element among B‚ Al‚ C and Si :- a. Has the highest first ionization enthalpy? b. Has the most negative electron gain enthalpy? 5. c. Write the atomic number of the element present in the third period and seventeenth group of the periodic table
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to add to the ease of organization‚ the periodic table also has eight groups organized by color depending on their chemical make-up. Each of the groups in the periodic table has different characteristics. These eight groups are: Noble Gases‚ Alkali metals‚ Alkaline Earth Metals‚ Transition Metals‚ Lanthanide Series‚ Actinide Series‚ Halogens‚ Semimetals‚ Basic Metal and Nonmetals. As stated by Chemicalelements.com‚ "The six noble gases are found in group 18 of the periodic table. All noble
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ASSIGMNET 1 | Research on student difficulties in Understanding Chemical reactions | Misconceptions on Strength of Acids and Bases | | Mariyam Zaina‚ 015482 | | | TITLE & INTRODUCTION Title: Misconceptions on Strength of Acids and Bases Researches shows that students often develops new theories about how the natural world works‚ prior to formal science education and frequently those theories are different to those of scientists(Demircioğlu et al.‚ 2005). Students develop
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southern California coastal ranges; all other valleys have drainage to the sea. The water runoff soda lake comes from the Carrizo and carries sediment from the basin into it. The lake is a shallow ephemeral‚ alkali Endothecia Lake‚ which means it’s a short lived closed basin the high alkali level. The water and surrounding areas are home to many creatures to include brine and fairy shrimp as well as lots of migratory nesting birds as well as the salt bush which thrives around its shore lines. The
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What is Chemical and Process Engineering? The branch of Engineering which is concerned with processes in which materials undergo a required change in composition‚ energy content or physical state at a reasonable cost and in the safest possible manner. History of Chemical Engineering For all intents and purposes the chemical engineering profession began in 1888. While‚ the term "chemical engineer" had been floating around technical circles throughout the 1880’s‚ there was no formal education
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distilled out‚ remove after condensation;Or get hot water mixed with oil emulsification and clarified in a centrifuge to remove phospholipids‚ free fatty acid and plant materials such as mucus.And vacuum drying‚ the product is called crude oil. Alkali refining: by alkali refining‚ can further remove most of the free fatty acids‚ phospholipids‚ pigment‚ iron and copper ions and some sulfur-containing compounds.And 0.02% ~ 0.5% of phosphoric acid in cylindrical POTS‚ 60 ~ 90 ℃ under processing 15-30 minutes
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German chemist‚ Julius Luthar Meyer drew a graph of atomic volume versus atomic mass for a variety of elements. He found that the elements with similar properties occupied alike positions on the curve as shown in following Fig. For instance‚ alkali metals (Li‚ Na‚ K‚ Rb‚ Cs‚ etc.) occupy the peak positions.
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10.0 EXPERIMENT ON DETERMINATION OF DISSOLVED OXYGEN Sl. No. Contents Preamble 10.1 Aim 10.2 Introduction 10.2.1 Environmental Significance 10.3 Principle 10.4 Materials Required 10.4.1 Apparatus Required 10.4.2 Chemicals Required 10.5 Sample Handling and Preservation 10.5.1 10.6 Precautions Procedure 10.6.1 Preparation of Reagents 10.6.2 Testing of Water Sample 10.7 Calculation 10.7.1 Table 10.7.2 Data Sheet 10.8 Interpretation of Results 10.9 Inference 10.10 Evaluation
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