standard concentration curve for bromophenol blue. 3. To determine the concentration of the unknown bromophenol blue solutions. 4. To determine the concentration of two different solutes‚ bromophenol blue and methyl orange‚ in a mixture. Material and method: Refer to practical manual page 7 Results: Part 1: Determination of Amax of bromophemol blue Table 1.1 Wavelength(nm) Absorbance 470 0.064 500 0.116
Premium Solution Curve Concentration
Procedure Taylor Levin 5.28.14 Chemistry 352- Organic Chemistry Lab Summer 2014 Purpose: To prepare isopentyl acetate (banana oil)‚ an ester‚ from isopentyl alcohol and acetic acid through the Fischer Esterification reaction. Reactions: acetic acid + isopentyl alcohol isopentyl acetate + water C2H4O2 + C5H120 CH3COOCH2CH2CH(CH3)2 + H20 Procedure: A reflux condenser was assembled using a 25-mL round-bottom flask‚ hot plate‚ and aluminum block
Premium Acetic acid Ester Distillation
] ( ) Time allowed: 55 minutes Introduction: The reaction can be represented by 5Br—(aq) + BrO3—(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(l) The progress of the reaction may be followed by adding a fixed amount of phenol together with some methyl red indicator. The bromine produced during the reaction reacts very rapidly with phenol. Once all the phenol is consumed‚ any further bromine bleaches the indicator immediately. So‚ the time for the reaction to proceed to a given point may be determined
Free Chemical reaction Chemical kinetics Chemistry
purpose was to determine whether Salicylic Acid made from methyl salicylate is the same as Salicylic Acid made from benzene. This information can be found by comparing the difference in melting points of the two samples of Salicylic Acid. Here are the physical properties of Salicylic Acid and the mechanism of reactions that occurred in this lab. How Salicylic Acid is derived: Procedure/Results First‚ .26mL of 2.0mmol methyl Salicylate was measured and put into a reaction vial along
Premium Temperature Salicylic acid Boiling
Jeana Greaves Chem3301-112 June 19‚ 2013 Synthesis of Aspirin from Methyl Salicylate Introduction The synthesis of Aspirin (Acetyl Salicyclic Acid) began with methyl salicylate and sodium hydroxide as the reagent. The polar oxygen accepts the electrons from now positively charged hydrogen. The positively charged sodium disassociates leaving the hydroxide ion with a negative Scheme 1 shows the mechanisms that were demonstrated during the synthesis of Aspirin. charge that attracts to the positively
Premium Aspirin Salicylic acid Water
Keghan Chapter 8 MULTIPLE CHOICE QUESTIONS Topic: Structure Elucidation 1. An alkene adds hydrogen in the presence of a catalyst to give 3‚4-dimethylhexane. Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product. The structure of the alkene is: CH3 A) CH3CH=C-CHCH2CH3 (cis or trans) CH3 CH3 B) CH3CH2C=CCH3 (cis or trans) CH2CH3 C) CH3 CH2=CCH2CHCH2CH3 CH3 CH2 D) CH3CH2CCHCH2CH3 CH3 CH3 E) CH3CH2CHCHCH=CH2
Premium Chlorine Hydrogen Hydrochloric acid
There should be 5 columns for the Chemical Indicators in the tables. ○ Phenolphthalein ○ Methyl orange ○ Blue litmus ○ Red litmus ○ Red cabbage juice ● Change: There are only 5 unknown solutions (A-E). Part I and II ● Change: You do not need to collect each chemical in test tubes. For Steps 2-8: ○ “Set up a grid on your ceramic spot plate. Add 1 or 2 drops of phenolphthalein into 1 well. Add 1 or 2 drops of methyl orange to a new well. Add 1 or 2 drops of red cabbage juice to a new well. Tear a small
Premium PH indicator Acid Base
Objective: To understand the importance of choosing suitable indicators for detecting the end points of acid-base titrations. To obtain titration curves some acid-base titrations. Materials and method: As shown in page 2 and 3 in General Chemistry practical manual 2011. Result: Part 1: Suitability of Indicators Strong acid-weak base titration Table I: Volume Titration Rough Accurate 1 Accurate 2 Final volume 0.00 14.65 0.00 Initial volume 35.20 48.00 33.50 Volume of
Premium PH indicator PH
reactions: a. Grignard reaction including identification of the nucleophile. b. Conversion of nitriles into carboxylic acids and acid derivatives c. Diels-Alder reactions d. Reduction of aldehydes and reagents used for that reaction. e. Fischer esterification including identification of nucleophile‚ catalyst‚ and leaving group. f. Reaction of acid chlorides to produce alcohols. g. Reaction of carbonyl compounds with amines to produce amides including identification of nucleophile‚ catalyst‚ and leaving
Premium Carboxylic acid Alcohol Amine
Aims: 1. To use methyl orange and phenolphthalein as indicators to determine accurately the end of an acid-base titration. 2. To present titration data correctly. Observations: Table of Results Showing The Amount Of 0.12 Mol/dm3 Hydrochloric Acid Required to Neutralise 25cm3 Of Sodium Carbonate of an unknown Concentration Using Methyl Orange Indicator. Pipette Solution | Sodium Carbonate | Mol/dm3 | Burette Solution | Hydrochloric Acid | 0.12Mol/dm3 | Indicator | Methyl Orange | | | |
Premium Hydrochloric acid Chlorine PH indicator