Stoichiometry

6.3 Experimental - schematic representation and procedure for the synthesis of compounds V1-17 6.3.1 Synthesis of 6-nitro-1H-benzo[d]imidazole-2-thiol II (step 1) Ethanol (40 ml) and potassium hydroxide (0.01 mol, 56.11 gm/mol, 0.56 gm in 2 ml H2O) were taken in a dry round bottom flask. 4-nitrobenzene-1,2- diamine I (0.01 mol, 153.14 gm/mol, 1.53 gm) was added to it and stirred well to get a clear solution. Carbon disulfide (0.02 mol, 76.14 gm/mol, 1.2 mL) was added to the clear solution obtained

within this experiment we explored both parts of data and collected both for each reaction we made in lab and thanks to gravimetric stoichiometry we are able to determine percent mass changes that occur in each reaction due to the simple fact that in a chemical reaction the mass is never lost its only transformed, therefore we are able to make assumptions on stoichiometry as a whole and

Stoichiometry is the numerical relationship between products and reactants;from its calculations, one can predict the products when only the reactants are known or vice versa. Most calculations in chemistry use this in some way (Graves, 2013). Along with stoichiometry, dimensional analysis can also be used, and through the use of both one can calculate the moles of a substance, limiting reagents of a reaction- the substances that limit a reaction’s potential yield, substances that are in excess

Introduction Friedel-Crafts acylation of anisole with acetic anhydride was used in this experiement to synthesize 4-methoxyacetophenone with the use of a reflux apparatus. Friedel-Crafts reactions can be done by alkylation, which involves mixing an alkyl or acyl halide with a Lewis acid, or acylation, which is done with acid chlorides or anhydrides(Lefevre). Acylation was used because it does not have as many disadvantages aklyations reactions have such as polyalkylation, second electrophilic attacks

Old Dominion University ORGANIC 214 Alkene Addition Submitted by: Alkene addition: Bromination of (E) Stilbene Introduction: In this lab we used the greener approach, which involves the addition of bromine across a double bond. When bromine reacts with E-stilbene (trans-1,2-diphenylethene), two new chiral carbons are created from the sp2 carbons, therefore 3 different dibrominated stereoisomers are possible: meso-(1R,2S), or the raceminc mixture-(1R,2R) or (1S,2S)-dibromo-1,2-diphenylethane

Synthesis of Isopently Acetate (Banana Oil) Deborah Nyabando CHEM 2311 TA: Nicholas Serratore February 20, 2014 Purpose: The purpose of doing this experiment was to prepare isopently acetate, an ester that has a pleasant smell like that of bananas from isopently alcohol and acetic acid by the Fischer esterification reaction. Sulfuric acid was used as a catalyst. Water, sodium bicarbonate, and sodium chloride were used to extract any impurities from the product. Simple distillation was then used

Synthesis of Alum from Aluminum Can Pieces *Marita John, Crystal Chacko, and Natalie Luera CHEM 111-553 Introduction: There is a great demand in industries to recycle aluminum for a salt such as dyeing of textiles, manufacturing of pickles, baking powder, leather tanning, and as a flocculant in water purification, etc. The negative ionic charge of alum of potassium and its molecular structure makes this compound unable to be absorbed by the skin, therefore, it is sometimes used as antiperspirants

Horseradish peroxidase Type 1 was used in this laboratory experiment, it was an enzyme that helped catalyze the oxidative coupling of vanillin to produce divanillin. The role of the enzyme is to increase the rate of the overall chemical reaction to reduce reaction time, therefore making the reaction process faster. The Horseradish peroxidase Type 1 achieved this by decreasing the activation energy required for a chemical to react, thus allowing the reaction to process through a lower activation energy

Results/Discussion: Procedure Explanation: In this experimental procedure, the solution had to be heated in order for the molecules to overcome activation barriers by colliding with one another and for the reaction to take place; the energy at room temperature is not enough to overcome the activation barriers and eventually form a product. This is due to the initial material being less thermodynamically stable than the product; in this case, methyl salicylate was less stable than the salicylic

Abstract: The main purpose of this experiment was to purify the steroid hormone, Cholesterol, by Bromination. This process was achieved by the electrophilic addition reaction to a natural product (Cholesterol dibromide). After adding the designated amount of the white powdered cholesterol and the reddish brown solution of bromine to the Erlenmeyer flask, the mixture turned to a bright yellow color then it was chilled in an ice-water bath, allowing crystals to form. Finally, the vacuum filtration