Chemistry Essay Examples

Discussion The lab was completed as instructed and the results obtained were used to plot a graph of pressure against strain for each of the three grids. The line produced by the ratio plotted was linear in nature which yields that pressure is proportional to strain. This was gave a direct relation to Hooke’s law…

Introduction In the words of Jones (1992:4), a “hazard is a physical situation with a potential for human injury, damage to property, damage to the environment or some combination of these”. These hazards have several consequences ranging from death, illness, injury, damage to a person, property or plant, production and product loss. Hazards could either…

Gravimetric analysis can be used to determine the quantities of both cations and anions, e. g. or chloride ions precipitated and weighed as silver chloride. Common anion concentrations measured Include chloride, sulfate, bicarbonate and fluoride Ions. Total dissolved solids (TDS): Total dissolved solids (TDS) are determined by evaporation to dryness of a known volume of…

Determination of the Waters of Crystallisation/ Water of Hydration, In Hydrated copper (II) Sulphate Introduction In nature there are some salts that will have water in their crystalline structure. These salts are commonly known as hydrated salts. Hydrated Copper (II) sulphate is one of these, as suggested by the use of the word hydrated in…

Introduction: Lycopene is a carotene because of its carbon and hydrogen composition. It is red in color and a member of the carotenoid family. Members of the carotenoid family play integral roles in plants. They use the absorption of light to aid in photosynthesis, and protect chlorophyll from damage. In humans, Lycopene acts as an…

Tuesdays lab group. As a source of error, during both of our crystallization, a lot of product was stuck on the filter paper and therefore it wasn’t included in our final product. Also, a lot of product went through the filter paper and down into the Erlenmeyer flask which we disposed of. Originally, the temperature…

The History of Cosmetics. When is comes to ‘Cosmetic chemistry’ I think about …. what it is made up of: colour, preservatives, natural ingredients and what is best for the consumer. The latest edition of the Cosmetics Toiletries and Fragrance Association (CTFA) Dictionary lists more than 10,000 raw materials. Every year, hundreds of new ingredients…

Urine is a typically sterile liquid by-product of the body secreted by the kidneys through a process called urination and excreted through the urethra. It is also an aqueous solution of greater than 95% water, with the remaining constituents, in order of decreasing concentration urea 9. 3 g/L, chloride 1. 87 g/L, sodium 1. 17…

Chemical machining ( CHM ) is a untraditional procedure in which stuff remotion occurs through contact with a strong chemical etchant. Applications as an industrial procedure began shortly after World War II in the aircraft industry. The usage of chemicals to take unwanted stuff from a workpart can be applied in several ways, and several…

My hypothesis is that dissolved Phosphate will change for the total phosphorus when left under a light. I believe that suspended phosphorus has the biggest impact on the eutrophication of lakes. When there is an increase of phosphorus in lakes, this leads to and increase in phytoplankton. This then leads to a decrease in water…