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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Determining Total Phenolic Content of Grape Juice using Visible Spectrophotometry Formal Food Analysis Laboratory Report February 7‚ 2013 By Carla Reed Lab partner: Nina Jung Total Phenolic Content of Grape Juice using Visible Spectrophotometry Abstract The health benefits of red wine are well known and consumption has been encouraged more over the years because of the populations increasing obesity rates and the inherent complications thereof; including coronary heart disease and
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Bio 6 (Mon. Lab) 5/6/13 The Effects of Pepsin VS. Trypsin in The Digestion of Protein Introduction As food is mechanically and chemically digested through our oral cavity then passes through our pharynx and down our esophagus‚ our food then enters the stomach. The stomach‚ being the main organ for storage‚ also helps with breaking down our food‚ but in order to accomplish that our pancreas helps by excreting an inactive digestive enzyme called pepsinogen. Pepsinogen is the inactive form
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acetic acid and isopentyl alcohol. This was an acid catalyzed Fischer esterification. Both extraction and distillation were employed to obtain a pure product. IR spectroscopy and gas chromatography were used to determine purity of the final product. Reagents: * Compound: | * MW (g/mol): | * MP (°C): | * BP (°C): | * Density (g/mL): | * Properties/ Safety: | * Isopentyl AlcoholC5H12O | * 88.15 | * -117.0 | * 132.0 | * 0.81 | * Clear‚ colorless liquid‚ disagreeable
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0.225 g Moles of Ferrocene 1.21 * 10 ^ -3 mol Initial volume of acetic anhydride 1.00 mL Moles of acetic anhydride 0.0110 mol Initial volume of phosphoric acid 0.300 mL Initial moles of phosphoric acid 5.15*10^-3 mol Limiting reagent Ferrocene Moles of limiting reagent 1.21*10^-3 mol Final weight of product 0.288g Theoretical yield 29.49 Moles of product 3.73*10^-4 mol % yield 97% melting point (°C) of product 128°C -131°C Calculations: Moles of Ferrocene 0.225g * mol of ferrocene/186
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68.6 %‚ 54.6 %‚ and 55.9 %. Introduction In the chemical process of bromination‚ an alkene is halogenated with bromine. Solvents that are typically used include methylene chloride and carbon tetrachloride along with iodine‚ the traditional reagent. However‚ because of the carcinogenic properties of the solvents and the corrosiveness of iodine‚ other alternatives are utilized : bromination with pyridinium tribromide‚ bromination with hydrogen peroxide and hydrobromic acid‚ and ethanol replaces
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salicylic acid) from salicylic acid and acetic anhydride. CO2H OH salicylic acid 2g 0.014 mole O O O CH3 H2SO4 ethyl acetate CO2H O O acetyl salicylic acid acetic acid CH3 O + H3C + H3C OH acetic anhydride 5 mL 0.05 mole The limiting reagent is salicylic acid. The theoretical yield of acetyl salicylic acid is 2.52 g. Physical Data:* mp MW salicylic acid 157-9˚ 138 acetyl salicylic acid 135-6˚ 180 acetic anhydride — 102 acetic acid — 60 sulfuric acid — 98 ethyl acetate — 88
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balanced equation will be looked at and then the theoretical yield will be calculated. In order to calculate the theoretical yield‚ two equations will be used: Will be used for both reactants to determine which reactant is the limiting reagent. After the limiting reagent is used‚ then the theoretical yield will be calculated using: This will give the mass of the Acetaminophen. The actual yield will be available in the experimental data‚ and using this knowledge‚ this equation will be used to calculate
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with aqueous sodium bicarbonate. The ester is purified by distillation 4.APPARATUS AND REAGENTS: 1. Isopenthyl alcohol(also called isoamyl alcohol or 3-methyl-1- buthanol) 2. Glacial acetic acid 3. Concentrated sulphuric acid 4. Round bottom flask 5. Reflux apparatus 6. Heating mantle 7. Cold water 8. Conical flask 9. Aqueous sodium bicarbonate 10. Red litmus paper 4.APPARATUS AND REAGENTS: 11. Saturated aqueous sodium chloride 12. Anhydrous
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Calculation on the molar enthalpy change of a neutralization reaction Principle H2SO4(aq)+2NaOH(aq)=Na2SO4(aq)+2H2O(l) The reaction is a exothermic reaction‚ when the heat released by it is absorbed by water‚ the temperature of the water increases. The heat produced by the reaction can be calculated if it is assumed that all the heat is absorbed by the water. Heat change of reaction=-heat change of water =-mH2O×cH2O×△TH2O As the water has gained the heat produced by the reaction‚ the heat change
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