GRAVIMETRIC ANALYSIS Methods in GA Precipitation Method - involves isolation of an ion in solution by a precipitation reaction‚ filtering‚ washing the precipitate free of contaminants‚ conversion of the precipitate to a product of known composition‚ and finally weighing the precipitate and determining its mass by difference. From the mass and known composition of the precipitate‚ the amount of the original ion can be determined. Volatilization Method -the analyte or its decomposition products
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+ 4HCl(aq) Zn2+(aq) + 4H2O(l) + 4Cl-(aq) Post-Lab Questions: 1. What cation(s) are present in the unknown sample? How do you know? The cation(s) present in the unknown sample are silver and iron. I know this because the precipitates and the colors of the elements precipitates matched therefore making the unknowns identifiable. 2. Write a net ionic equation for each of the following steps in the qualitative analysis scheme. a) Separation of silver ions‚ Ag+ Ag + (aq) + HCl(aq) AgCl(s) +
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Review Technique (PERT) Scheduling with Resource Constraints Using Qualitative Simulation Graphs (QSG) Prepared by: Susan H. Davenport July 6th‚ 2009 This report assesses the risk in the application of the Qualitative Simulation Graph Methodology (QSGM) model that addresses Program Evaluation and Review Technique (PERT) scheduling-with-resources problem. PERT scheduling is a network Analysis technique based on mathematical equations known as Runge-Kutta
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(a) | Qualitative characteristic being employed when companies in the same industry are using the same accounting principles. | Comparability | (b) | Quality of information that confirms users’ earlier expectations. | Feedback value | (c) | Imperative for providing comparisons of a company from period to period. | Consistency | (d) | Ignores the economic consequences of a standard or rule. | Neutrality | (e) | Requires a high degree of consensus among individuals on a given measurement.
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to remove a large majority of the impurities whicn include viruses and media components. At Stage 3‚ prior to cation exchange chromatography‚ the purified material in the eluted stream is then subjected to freezing‚ thawing and pooling. Stage 4 involves the Solvent/Detergent (S/D) viral inactivation which is the first dedicated viral clearance step. At Stage 5‚ the product undergoes cation exchange chromatography which aids in removing the S/D reagents while the product remains bound to the column
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Assignment Week 1 Answer the following questions: 1. Describe the rationale for utilizing probability concepts. For practical reasons‚ variables are observed to collect data. The sampled data is then analyzed to elicit information for decision making in business and indeed in all human endeavors. However‚ sampled information is incomplete and not free from sampling error. Its use in decision-making processes introduces an element of chance. Therefore‚ it is important for a decision-maker
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The knowledge of chemical analysis today has become important not only for scientists in their research but in fact bears influence in our daily routine as well. To recognize and classify these uses‚ we have to first understand‚ what is chemical analysis?Chemical AnalysisChemical Analysis is a body of procedures and techniques used to identify and quantify the chemical composition of a sample of substance.1 It may be said as a collection of all the techniques required to obtain any chemical information
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References: 1. Nielsen‚ S. Suzanne. Food Analysis. Third ed. New York:Kluwer Academic/ Plenum Publisher‚ 105-110 (2003). 2. Pomeranz Y.‚and Meloan Cliffton E. Food Analysis: Theory and Practice. Third ed. New York: Chapman & Hall‚ 602-624 (2000). 3. Tee E Siong‚ Mohd Ismail Noor‚ Mohd Nasir Azudin‚ Khatijah Idris. (1997). Nutrient Composition of Malaysian
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Gravimetric Analysis of SULFATE as Barium Sulfate. Objectives * To learn the techniques associated with gravimetric analysis. * To use stoichiometry to calculate the percentage by mass of sulfate in an unknown sulfate salt. Background Gravimetric analysis is a quantitative method for accurately determining the amount of a substance by selective precipitation of the substance from an aqueous solution. The precipitate is separated from the remaining aqueous solution by filtration and
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Arterial blood gases are only done in the very sick children‚ who have been intubated/ventilated and have arterial lines in situ (usually in the theatre prior to transfer to the PICU in Newcastle. Here is a stepwise approach to blood gas analysis. STEP 1: [pic] STEP 2: Look at pCO2 [pic] STEP 3: Look at Bicarbonate & Base excess (BE) [pic] Base excess (BE): Base excess is the amount mmol/l of base that is needed to correct pH back to normal when pCO2 is corrected
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