reactant will be used in a precipitation reaction‚ assuming that the amount of product is given‚ and to figure out the actual yield vs. the theoretical yield and to calculate the percent yield. The other purpose of this experiment is to practice the gravimetric analysis technique. The solution of Na2SO4 (0.5 M) and BaCl2 (0.1 M) were chosen in this experiment. The equation was used: Na2SO4 (aq) + BaCl2 (aq) → BaSO4 (s) + 2 NaCl (aq). However‚ in this reaction‚ cation Ba2+ and anion (SO4)2- play the main
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Unit _ - Control of Air Pollution FABRIC FILTER – It consists of a tabular bag which is closed at the upper end and has a happer attached at the lower end to collect particles when they are dislodged from the fabric. Many such bags are hanged in a bag house. The filter bags are cleaned occasionally by a mechanical shaker for efficient filtration. It has high efficiency and can filter 0.5 µm size particles. ELECTROSTATIC PRECIPITATOR – It works on the principle of electrostatic precipitation
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THE CHEMICAL EARTH: 1. The living and nonliving components of the Earth contain mixtures ● Construct word and balanced formulae equations of chemical reactions as they are encountered Reactants → products Chemical reaction: the way atoms are joined changes‚ atoms are not created nor destroyed‚ but are rearranged Indicators: emission of light or heat‚ odour formation of a gas formation of a precipitate colour change change in state aqueous = dissolved in water‚ an aqueous solution
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Hyperhidrosis is a disorder characterized by excessive sweating in amount greater than what is physiologically necessary to maintain homeostasis [1-5]. This condition may be primary (idiopathic) or secondary to an underlying disease or medication. Only primary hyperhidrosis (PHH) will be addressed in this work. Primary hyperhidrosis is a dermatological and neurological disorder caused by an abnormal activity of the eccrine sweat glands. A noteworthy portion of patients experiencing excessive sweating
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Chapter 1: Measuring the amount of substance Analytical chemistry: science of chemical measurement. Its object is the generation‚ treatment and evaluation of signals from which information is obtained on the composition and structure of matter Measurement: process of obtaining the magnitude of a quantity Example: The amount of saturated fat in the sample is 3 g/serving. Quantity: attribute of a phenomenon that may be distinguished qualitatively and determined quantitatively Value: magnitude
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each meter will be calculated and compared with each other alongside those arising in a rapid enlargement and a 90o elbow. The Hydraulic bench will be used along with the flow measuring apparatus to provide the essential liquid service and the gravimetric evaluation of flow rate. Experimental Design Figure 1.1: the flow measuring apparatus Figure 1.2: The explanatory diagram of flow measuring apparatus APPARATUS !. Flow measuring apparatus 2. Volumetric Hydraulic Bench 3. Water 4. Stopwatch
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Micrococcus sp. and Pseudomonas sp. were found to be hydrocarbon degraders and these two bacteria’s were selected for the degradation test. The degradation of diesel engine oil was monitored at a five day interval up to twenty five day period‚ using gravimetric method. After 25 days of incubation period‚ Pseudomonas sp. degraded 67.57 % of the oil and Micrococcus sp. with 52.95 %. But the mixture of Micrococcus sp. and Pseudomonas sp. were found to have great potential to degrade diesel engine oil i.e
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CARIBBEAN EXAMINATIONS COUNCIL Caribbean Advanced Proficiency Examination CAPE ® CHEMISTRY SYLLABUS Unit 1 - effective for examinations from May/June 2007 Unit 2 - effective for examinations from May/June 2008 CXC A11/U2/06 Published by the Caribbean Examinations Council All rights reserved. No part of this publication may be reproduced‚ stored in a retrieval system‚ or transmitted in any form‚ or by any means electronic‚ photocopying‚ recording or otherwise without prior permission
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activity asymmetric and dissymmetric molecules‚ General Principles of Inorganic qualitative analysis: Molecular symmetry: Concept‚ types‚ The symmetry operations of a molecule form a group‚ Theory of quantitative analysis Principles of volumetric‚ gravimetric analysis‚ introductory treatment to Pericyclic Reactions. II. INORGANIC CHEMISTRY: Periodicity and Periodic Properties‚ s‚p‚d‚and f block elements Theories of bonding in metals: Valence bond theory‚ Explanation of metallic properties and its limitations
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method. Gel technique has been adopted at ambient temperature to attain better result. The grown crystals were transparent and colourless. The crystal size has been obtained the range about 5mm X 3mm X 2mm. Thermal study of ZTS crystal from Thermo-Gravimetric Analysis (TGA) and calculate activation energy and other Thermal parameters. Key Words ZTS Crystal‚ TGA Analysis‚ Activation Energy Introduction Zinc Tris-thiourea Sulfate (ZTS) is a Semi Organic Nonlinear Optical (NLO)
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