preparative. A technique experiment is one in which you are performing a technique for the first time and studying its details‚ for example‚ distillation and extraction. A preparative experiment is one in which a compound is synthesized from other reagents. Physical Data List the molecular weight‚ melting point‚ boiling point‚ density‚ solubility‚ and hazards of all pertinent chemicals used in the experiment. You can find this information in the CRC Handbook of Chemistry and Physics. (We
Premium Chemistry
Mapua Institute of Technology School of Chemical Engineering and Chemistry Muralla St.‚ Intramuros‚ Manila Melting Point and Boiling Point of Organic Compounds Group No. 5 Manacup‚ Cris Vincent L. Oblena‚ Adrian D. Ong‚ Joshua Jyro B.* *Leader ABSTRACT In compounds‚ two of the physical properties affected by the varying structures are melting point and boiling point. Through the use of the Thomas-Hoover Melting Point Apparatus or the micro method‚ the melting and boiling point of
Premium Hydrogen bond Carboxylic acid Melting point
The purpose of the unknown bacteria lab assignment was to select an unknown bacteria culture and‚ through a series of metabolic tests‚ identify which bacteria genus resided in the pure culture received. A nutrient broth inoculated with bacterial culture (numbered 45‚ henceforth referenced as U45) was selected and a streak plate was made to isolate a pure culture for use throughout the assignment. From the streak plate‚ several slides were made to determine the morphology of unknown 45. A Gram stain
Premium Bacteria Metabolism Cellular respiration
(Rideal- Stewart method) and other classical methods of analysis are the common means of determining the amount of dissolved oxygen. But they suffer from a number of drawbacks. They are rather slow in most of the steps‚ from sampling via addition of reagent to end point determination. They are often subject to interference
Premium Water Oxygen Sewage treatment
Moles Stoichiometry/Comments acetaminophen 0.354 g 151.16 2.34 x 10-3 limiting reagent ethyl iodide 0.3mL 155.97 3.75 x 10-3 1.6 equiv ’s sodium ethoxide 2.6mL 68.05 3.3 x 10-2 catalyst‚ reaction solvent crude product obtained: phenacetin 0.32g 179.22 1.78 x 10-3 yield = 76.06% Recrystallized product: phenacetin 0.16g 179.22 8.92 x 10-4 yield = 38.12% Table 1-Reagent and yield Data for the synthesis of Phenacetin Calculations Crude phenacetin: Mass of
Free Chemical reaction Base Alcohol
Sodium borohydride Reduction of Benzil Introduction: The Purpose of this experiment is for the students to learn how to use sodium borohydride to reduce benzil to its secondary alcohol product via reduction reaction. This two-step reaction reduces aldehydes by hydrides to primary alcohols‚ and ketones to secondary alcohols. In order for the reaction to occur and to better control the stereochemistry and yield of the product‚ the metal hydride nucleophile of the reducing agents such as LiH‚ LiAlH4
Premium Alcohol
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
Premium Acid Oxygen Solvent
Q 1. In this practical exercise you will be using biuret reagent. Why is biuret reagent used in this practical? The biuret reagent is used to assess the concentration of the protein because peptide bonds occur with the same frequency per amino acid in the peptide. The intensity of the colour‚ and therefore the absorption‚ is directly proportional to the protein concentration. Q 2. What is the experimental reason for constructing a standard curve? Multiple samples with known properties
Premium Experiment Amino acid Sun
In layman’s terms in this experiment it was used to differ reagents to create a precipitate. Changing the reaction through addition of HCl we can see that it created a precipitate‚ when filtering it‚ it can be see that the common ion effect is dependent on the solubility for each ion tested in the lab. First step
Premium Solubility Chemistry
purify our products‚ we will have to add water to our crystals so that the acetylsalicylic acid can be dissociated from impurities. Using a technique called vacuum filtration‚ crystals will be held on a filtration paper while the liquid portion of reagents will drained into an Erlenmeyer flask. To purify our crystals even more‚ we will have to perform a procedure called re-crystallization‚ using ethyl acetate as our solvent instead of water in order to prevent decomposition of our products‚ and
Premium Aspirin Acetic acid Acetic anhydride