Chemistry Essays, Research Papers & Term Papers (1,259) essays
Chemistry essays:
Polymerization of Composite Resins: Dental Chemistry
... aromatic methacrylate is considered to be a rigid polymer because of the benzene rings near its center, and also provide specific sites for free radical polymerization from its terminal methacrylate groups. Since this structure has hydroxyl groups near the benzene ring, this polymer ...
The aim of the experiment is to determine the percentage of aspirin in different commercial preparations (Aspirin & Magnyl) and to find out which is the best value for money.
... reaction go faster and to get that light purple colour in a short period of time with less solution of sodium hydroxide than expected. But still we could have used Bunsen burner to make the reaction go faster, since heat speeds up the reaction ...
New Derivatives Of Antimalarial Drug Artemisinin
... Chinese government campaign, to search for new active drugs against malaria, in Chinese medicinal plants. In the general mechanism accepted for the action of artemisin, the free haem group, obtained during the haemoglobin digestion is proposed to catalyse the formation of oxyl radicals, by oxidation ...
Enzyme Concentration
... Enzyme Catalysis Concentration On the Substrate Reaction Rates Name here Biology October 21, 2001 Enzyme Concentration 2 Abstract Hydrogen Peroxide 1.5% was germinated with different levels of enzyme catalase concentrations from 100% enzyme to 0% enzyme, adding water to dilute the concentrations ...
The Density Of An Unknown Liquid
... needed in this lab, but if you would like to use it, go ahead. (2) Get all of your materials together at your lab station, there isn't really a lab setup per-say, but just have them around for easy ...
Cell Phones
... 911, E911. Carriers want to provide E911 to the government and industry, but it has not been accepted yet ... which cell you are and when it wants to ring your cell phone. 4. The MTSO gets the call, ... and cellular phones have progressed at a fast rate in the last 60 years (Telecom, 2000). More than ...
Organic Synthesis: Preparation & Analysis of Aspirin
... compound acetylsalicylic acid or aspirin from acetic anhydride and salicylic acid. H2SO4 was used as a catalyst to speed up the reaction. Theory Aspirin is a one of a least expensive and most useful drugs ...
Enthalpy Of Solution Lab Report Assessed on: * Data Collection and Processing (DCP) * Conclusion and Evaluation (CE)
... Aim The aim of this investigation was to determine the enthalpy of the solution created when dissolving Sodium Hydroxide (NaOH) in water (H2O). Theory When a solid ionic compound ...
Acid Rain and how to Scientifically Prevent it
... is precipitation that has reacted with harmful compounds of mostly Nitrogen, Sulfur and Carbon. These compound emissions are emitted from factories, ... reduce the emissions of harmful gasses from factories, power plants and everyday cars. Works Cited"Acid rain -." Wikipedia, the free encyclopedia. Web ...
Preparation and Recrystallisation of Aspirin
... group (-COO). In this experiment, the hydroxyl group (-OH) on the benzene ring in salicylic acid reacts with carbonyl group in acetic anhydride to form an ester functional group. Thus, the formation of acetylsalicylic acid (aspirin) is referred to as an esterification reaction ...