ChemActivity 10: Exercises 1. Draw a complete mechanism including the intermediate and most likely product for the reaction of each alkene below with H-X.…
Lead is a naturally occurring element found in small amounts in the earth’s crust (EPA, 2014).…
Aluminum is a tin-white metal which melts at 640°C and boils at 2,327-2,450°C (N/A, 2012). It is very light and has a density of 2.68g. It is both ductile and malleable, making it stiff and strong, and with frequent annealing it can be rolled into thin foil (N/A, 1996-2012). It is a good conductor of heat and electricity, and it is a solid in its standard state. One of Aluminums chemical properties is that in moist air, it combines slowly with oxygen to form aluminum oxide. The aluminum oxide forms a very thin, whitish coating on the aluminum metal (N/A, n.d.). This element is also a fairly active metal. It reacts with many hot acids and with alkalis. Aluminum also reacts quickly with hot water, and in powdered form, it catches fire quickly when exposed to a flame (N/A, 1996-2012).…
| The EPA allows tap water to have 10 parts per billion (ppb) of arsenic in it, although scientists now know there is no safe level of arsenic.…
Introduction: Lycopene is the red pigment in ripe tomatoes and, as an antioxidant, helps to fight certain cancers. In this lab you will isolate lycopene from tomato paste. To do this you will first extract carotenoid pigments from the paste and then use column chromatography to isolate the lycopene from the other pigments. You will then use TLC to evaluate the column chromatography separation. Note: because lycopene is light-sensitive, prevent any unnecessary exposure to light.…
Typically, a play about two elderly woman poisoning lonely males would never have entertained my short attention span, but "Arsenic and Old Lace" was able to grasp and maintain my interest. The cleverly complex plot (the two woman murderers have a mobster nephew) proved to be both suspenseful and engaging, encouraging audience members to examine and predict the next twist. Each scene builds the anticipation of the climactic resolution, never failing to loose the viewers' attention. Flawlessly constructed with straightforward language, the involved story was not difficult for even the simplest audience member to understand.…
Arsenic damages any life forms it has contaminated. Most animals, fish, bacteria, and birds will die when they come into contact with arsenic. Plants cannot properly photosynthesize.…
The description is for dichloromethane-aqueous solution mixture, but you will use the same technique for your tert-butyl methyl ether-aqueous solution mixture. Note, however, that the ether is less dense than water, while dichloromethane is denser than water.…
Personal Protection-Solid lead is believed to present a relatively low hazard to health, but it is a cumulative poison, and can cause serious harm if inhaled as a powder, or ingested over a long period. Most lead salts are very poisonous, as are many organic compounds containing lead, such as lead tetraethyl.…
There are some legislation apply in any kind of organisation. Here we are going to describe legislation which are we need to follow in ABC Chemical company.…
Some other natural arsenic compounds appear as white, yellow or colorless powders. Metal alloys of arsenic are used in the manufacture of lead-acid batteries. Other compounds of arsenic are used as colors and dyes in the production of fireworks, paints and glass. Up to 90% of all arsenic is used as a wood preservative in pressure-treated lumber. Arsenic compounds are also used in some pesticides and military weapons, such as poison gas. Many high-tech devices such as light emitting diodes (LEDs), semiconductors and lasers contain arsenic compounds. ( NEED WHERE IT IS FOUND…
Arsenic exposure renders the brain tissue vulnerable to the free-radical attack resulting in apoptosis in the neural cells. Report suggests that arsenic exposure to mouse litters increased neuronal necrosis and mitotic impairment resulting in cerebellar immaturity [12]. However, arsenic induced neurotoxicity is not fully elucidated and its therapeutic outcome is out of…
Rogers and Leonard Lewisohn opened a smelting business, one of the first actually, in the city and added it to the American Smelting and Refining Company (ASARCO). Marianne Sullivan wrote a book in 2014 called Tainted Earth that examines the impact smelting has had on El Paso. In addition, she also observes the environmental and public health effects this process has had on the community. In the late 1800’s and early 1900’s people were looking for new industries to thrive and ways to make money. “When Rogers and Lewisohn came up with a faster and more efficient way to extract metal from ore their business quickly boomed (Sullivan, 2014, pg.14)” Little did the two men know that during this procedure, lead arsenic are released into the atmosphere. Over time production of releasing metal from ore increased and so did the toxins released into the…
Antimony is found in the environment, but found in very low levels. The majority of antimony comes from the resources humans use. The antimony used in human products increase the amount of antimony in the natural environment. There is some antimony in soil, but high concentrations of it are found in wastes sites. The most common ways antimony can enter the body is simply consuming it or breathing its dusts in. Also contact with soil with high amounts of antimony can increase unwanted exposure. Since antimony is used to produce some types of food packaging, such as plastic water bottles, consumption is much more likely than breathing it in and touching toxic…
Arsenic, a silver-gray metal-like element, can be found throughout the earth’s crust. It is assigned atomic number 33 in the periodic table, and has a relative atomic mass of 74.92.(1) Being found throughout the earth crust, it is the twentieth most abundant element and is found in our air, water, and soil. Arsenic is usually combined with other elements, forming compounds with oxygen, chlorine, and sulfur; and it is in both organic and inorganic forms. Organic arsenic is combined with carbon and hydrogen, where inorganic binds with elements such as oxygen, chlorine and sulfur. Common inorganic compounds of arsenic are trivalent arsenic and pentavalent arsenic; and two reocurring organic compounds are monomethyl arsonic acid and roxarsone.…