It was recently thought have only one species (the type species‚ described in 1775‚ Pemphis acidula [2]) but is now believed to have at least two.The plant extracts of Pe. acidula showed strong by disc diffusion method-standardization and antibacterial activity. This three extracts possessed interpretation. Noticeable antibacterial activity against 5 human 9. Antimicrobial and pathogenic strains. All the three extracts of Pe. acidula were tested evaluated. Therefore‚ it is
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Synthesis and Analysis of the Coordination Compound Pentaaminechlorideocobalt (III) Chloride Heaven Lin and Forest Lin W.M. Keck Science Department‚ Claremont McKenna‚ Pitzer‚ and Scripps Colleges 925 N. Mills Avenue‚ Claremont‚ California 91711 Abstract Through using the spectrometer and titrations‚ the amount of the coordination compound‚ pentaaminechloridocobalt (III) chloride‚ was determined through a synthesis through an oxidation reduction of cobalt (II) chloride hexahydrate (CoCl2·6H2O)
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* pipette with pipette bulb * conical flask * 1 beaker * 1 molar sodium hydroxide solution * 2 molar hydrochloric acid solution * 1 funnel * 1 piece circular filter paper * crushed poultry eggshell * crushed farm eggshell * phenolphthalein * Distilled water * White tile * Paper tray * burette in burette stand * electronic scale Procedure: Step 1: Standardization of the NaOH solution using Standard 0.1M PHP 1. Take 10ml of the given NaOH
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SYLLABUS CHEMISTRY (043) CLASS-XII – (2012-13) Annexure - ‘ I ’ S.No. 1. 2. 3. 4. Type of Question Long Answers (LA) Short Answers-II (SA II) Short Answers-I (SA-I) Very Short Answer (VSA) Total Marks for No. of Total Marks each Question Questions 5 3 2 1 3 9 10 08 30 15 27 20 08 70 Weightage 4 5 5 5 4 3 8 5 3 4 4 6 4 4 3 3 70 Total: S.No. UNIT 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Solid State Solutions Electrochemistry Chemical Kinetics Surface Chemistry General Principles
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The University of Lethbridge Department of Chemistry & Biochemistry Chemistry 2740 Laboratory Experiment 2 A KINETIC STUDY OF THE BASE CATALYZED CLEAVAGE OF DIACETONE ALCOHOL USING A DILATOMETER The decomposition of diacetone alcohol into two molecules of acetone is catalyzed by hydroxide ions and is an example of an aldol condensation in reverse. O OH OHO 2CH3-C-CH3 CH3-C-CH2-C(CH3)2 The rate of decomposition is first-order with respect to the concentrations of both diacetone alcohol
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EXPERIMENT SIX - ANALYSIS OF STOMACH ANTACID TABLETS Purpose In this experiment you will measure the amount of stomach acid consumed (or neutralized) by various antacid tablets (Maalox‚ Tums‚ Rolaids: no Pepcid or Tagamet!). If you have a favorite one‚ bring a package to the lab (one color only). Inside your stomach‚ excess hydrochloric acid is neutralized by the antacid. Different antacids use different metal hydroxides‚ such as Al(OH)3 or Mg(OH)2. The general formula for this reaction
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Designation: D2972 – 08 Standard Test Methods for Arsenic in Water1 This standard is issued under the fixed designation D2972; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 These test methods2 cover the photometric and atomic
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An Investigation into the Factors Affecting the Rate of the Reaction between Calcium Carbonate and Hydrochloric Acid A chemical reaction is the process by which atoms or groups of atoms are redistributed‚ resulting in a change in the molecular composition of substances. The reaction rate is how quickly a reaction occurs and this can be affected by four different factors: ¡¤ changing the surface area of any solids involved ¡¤ changing the concentration of reactants in solution ¡¤ changing the temperature
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Chem 1252‚ General Chemistry I Lab Johnson Acid-Base Titrations Introduction Titration is a convenient quantitative method for accurately determining unknown concentrations of solutions. A necessary requirement for its use is that a standard solution (a solution of known concentration) reacts chemically with the solution whose concentration is being determined. The standard solution is added to a solution of unknown concentration until all of the unknown solution has reacted. From the known quantity
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English Proficiency This test is designed to assess the test takers’ general proficiency in the use of English language as a means of self-expression in real life situations and specifically to test the test takers’ knowledge of basic grammar‚ their vocabulary‚ their ability to read fast and comprehend‚ and also their ability to apply the elements of effective writing. 1. Grammar 1. Agreement‚ Time and Tense‚ Parallel construction‚ Relative pronouns 2. Determiners‚ Prepositions‚ Modals
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