photocatalytic degradation of phenol has been tested primarily with titanium dioxide (TiO2) either alone or in combination with other materials. In this work‚ Mg/Al hydrotalcites prepared by two methods using inorganic (HC) or organic (HS) chemical reagents‚ along with mixed oxides produced by calcination of these products (HCC and HSC) were mixed with titanium isopropoxide to obtain hydroxide-TiO2 compounds (HCC-TiO2 and HSC-TiO2) to test their photocatalytic activity compared with solutions of 10
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cooling the solutions in an ice bath. Pure acetanilide was the product after the second crystrallization which was obtained by finally removing the impurities through filtration. The computations performed in this experiment are determining the limiting reagent‚ theoretical yield and percent yield. INTRODUCTION Impurities are common in compounds most especially organic ones that came from natural origin. There can be combinations of soluble‚ insoluble and colored impurities. Recrystallization
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Abstract: The purpose of this lab was to synthesize triphenylmethanol from benzophenone and bromobenzene by the formation of a Grignard compound with the reagents bromobenzene and magnesium metal. The bromobenzene was first transformed into the Grignard compound and was then reacted with the benzophenone to make the final product. The mixture was then mixed with sulfuric acid and the organic layer was extracted via a separatory funnel. The mixture was then recrystallized from methanol and was allowed
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138.6 g KClO3 X ( 1 mol / 122.55 g ) = 1.131 mol KClO3 3. Determine the limiting reagent [if necessary] (Use mole ratios to figure out.) * Not necessary to determine because there is only 1 reactant in this decomposition reaction. 4. Use ratios to find the moles of the reactant or product you need to find. Since KClO3 is the only reactant‚ it is the limiting reagent. You use the moles of KClO3 if you have to calculate how many moles of oxygen gas
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Hong Kong Diploma of Secondary Education Examination Chemistry School-based Assessment Sample Tasks Teachers may use the sample tasks for non-profit making educational and research purposes with proper acknowledgement. © 留 2010 Hong Kong Examinations and Assessment Authority All Rights Reserved 2010 Chemistry School-based Assessment Practical Related Tasks Volumetric analysis Teacher Notes NSS Chemistry Curriculum Link: Time Required: 40 minutes Topic IV Acids and Bases Students
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Part III: Stoichiometry A) All conversions using the mole‚ including GFM. -Mole (Avogadro’s #) = 6.02 x 10^23 QUANTITY MOLE MASS GFM: Number on periodic table. B) Conversions using 1 mole = 22.4L (self explanatory) C) Conversions i.e. 2Bread + 3PeanutButter --> 1Sandwich How many pieces of bread are required to make 6 sandwiches if I have an excess of peanut butter? 6 sandwiches x 2 bread = 12 Breads. 1 sandwich More examples? Ask. D) Limiting and Excess Reactants
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visually identify the production in the previous reaction‚ since it changes color from purple to yellow-brown if reacted with alkene under aqueous conditions. Balanced equation: C10H14O2 + KMnO4 + 2H2O --> C10H16O4 Mechanism: 2 - Table of reagents . |Compound |Mol Mass (g/mol) | |Dissolution of MCPBA in CH2Cl2 |solution was clear‚ MCPBA dissolved
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Lab 3: Grignard Synthesis Objective: The goal of this lab is to synthesize a Grignard reagent from bromobenzene and magnesium metal in diethyl ether. This same Grignard reagent would then be used to prepare a tertiary alcohol and then purify and characterize the product. Table of Reagents: Name Chemical formula Melting Point Boiling Point Density Safety Hazards Diethyl ether C4H10O -116.3°C 34.6°C 0.7134 g/ml Flammable Bromobenzene C6H5Br -30.6°C 156°C 1.5 g/ml
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reaction and write the expression to calculate the half-life period of the reaction. Give two consequences of lanthanoids contraction. Complete the following reaction; 0 Cu/300 C CH3CH 2 OH ¾¾¾¾ ®? i) ii) 16. 17. 18. R - COOH ¾¾ ® RCH 2 OH . Name the reagent used in the conversion? How does ketone react with ethylene glycol. Write chemical equation for the reaction. What are analgesics? Give an example for non-narcotic
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Test 2 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Find the combination that will give a gas as a product A. AgNO3(aq) + NaI(aq) B. HCl(aq) + Na2CO3 (aq) C. MgCl2(aq) + K2CO 3 (aq) D. CaSO4 (aq) + (NH4)3 PO4(aq) 1) A) A B) C C) B D) D 2) 2) The balanced molecular equation for complete neutralization of H2 SO4 by KOH in aqueous solution is __________. A) 2H+ (aq) + 2OH- (aq)
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