Julia Macrino Mr. Musto Chemistry Block 7 September 23‚ 13 Materials: graduated cylinder 4 beakers glass funnel plastic funnel ring stand filter paper stirring rod charcoal sand foul water sample rubber tubing pinch clamp iron ring plastic cup scoop Objective/Purpose: To purify a sample of foul water using oil-water separation‚ sand filtration‚ and charcoal adsorption and filtration. Procedure: First‚ you have the measure the foul water sample and record it in your
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Maithani M et al. / Pharmacie Globale (IJCP) 2010‚ 5 (05) Available online at www.pharmacie-globale.info ISSN 0976-8157 Research Article PHARMACIE GLOBALE INTERNATIONAL JOURNAL OF COMPREHENSIVE PHARMACY DEVELOPMENT AND VALIDATION OF A RP-HPLC METHOD FOR THE DETERMINATION OF CHLORPHENIRAMINE MALEATE AND PHENYLEPHRINE IN PHARMACEUTICAL DOSAGE FORM Mukesh Maithani*‚ Richa Raturi‚ Vertika Gautam‚ Dharmendra Kumar‚ Amrendra Kumar Chaudhary‚ Anand Gaurav and Ranjit Singh School of
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Gravimetric methods of analysis are based on the measurement of mass (Skoog et al 2000). Its analysis made use of producing precipitates‚ filtering‚ and weighing. On this note‚ certain precautions were made to ensure a valid data-set. The same analytical balance was used to weigh all samples. A low relative supersaturation was met to produce large precipitates. A supersaturated solution is an unstable solution that contains more solute than a saturated solution (Skoog et al 2000). Additionally‚
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CHEMISTRY Safety‚ Matter‚ and Measurement Lab Safety Dress appropriately Follow directions and act appropriately Know where emergency equipment is MSDS Material Safety Data Sheets- contain safety information about chemicals Converting metric units Kilo Hecto Deca Base Deci Centi Milli 1000 100 10 1 1/10 1/100 1/1000 Significant Figures NOT Significant Digits “Placeholders”- Zeros before the decimal point and after the number
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Chemistry is the science of matter and the changes it undergoes. The science of matter is also addressed by physics‚ but while physics takes a more general and fundamental approach‚ chemistry is more specialized‚ being concerned with the composition‚ behavior (or reaction)‚ structure‚ and properties of matter‚ as well as the changes it undergoes during chemical reactions. It is a physical science which studies various substances‚ atoms‚ molecules‚ crystals and other aggregates of matter whether in
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reactants are separated. A chemical change is when the reaction changes the reactants and creates a brand new substances that can’t be reversed. Antoine Lavoisier had the main contribution to The Law of Conservation. He wrote a textbook in 1789 on chemistry in it he introduced the Law of Conservation. He founded the 3 types of matter (solid‚ liquid‚ and gas). Along with this he also established the metric system. Lavoisier also made a lot of enemies because he had disproved various old theories. In
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Introduction Atomic Absorption Spectrometer (AAS) is an analytical equipment commonly used for the detection of heavy metals in particular sample. The first step to analysis in the AAS is the atomization of the desired element by converting it to a gaseous state. The atoms then absorb the energy emitted from the hollow cathode lamp corresponding to the desired element and a detector reads the signal and records the results. The results may be used quantitatively or qualitatively depending on the
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Name Lab Section GTA Station # 5. Extraction Pre-lab questions Complete the following questions and submit before beginning the experiment. 1. Which layer will be the aqueous layer when using dichloromethane (methylene chloride) as the solvent (i.e.‚ top or bottom)? Which layer will be the aqueous layer when using ether as the solvent? 2. When everything has been separated in Part D‚ which compounds will be in test tubes 1‚ 2‚ and 3?
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Chemistry Exam Review Matter and Chemical Bonding Significant Digits All non zero integers are significant ~ 456cm All zeros to the left of the first non zero digit are not significant~ 0.005kg All zeros between non zero digits are significant~ 207.08 km All zeros at the end of a number that has a decimal point are significant ~ 34.070 mg Density Density is a physical property of matter‚ as each element and compound has a unique density associated with it. Density defined in a qualitative
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References: Southam‚ Daniel‚ ed 2013. “Experiment B: Determination of Vanillin in Imitation Vanilla Essence”. In Principles and Processes in Chemistry 100 Laboratory Manual. B1-B10. Perth: Curtin University www.3dchem.com/molecules.asp?ID=307. Accessed 2/4/13 RHODIA.www.cefig.org/Documents/industrysupport/RHODIA%20GPS%20safety%20summar y.pdf. Accessed 2/4/13
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