Methanol Exposure And Its Effect On The Fertility Of Biota And Affect Their Appearance

Chemicals harm the growth of plants and animals, chemicals can lead animals to death. Many of the water animals

The purpose of this course is to provide the fundamental knowledge of the effects of environmental chemicals on living systems, and the toxic responses of the human and plant systems. Students will discuss risk, ethics, and social responsibility with regard to environmental toxicology.

In this lab, the molar mass of a volatile liquid is determined based on its physical properties in the vapor state. In order to calculate the molar mass, the mass, temperature, pressure, and volume is measured independently and then converted to the correct units. Sample C was obtained at the beginning of the experiment, which was later informed to be ethanol. Based on the calculations made, the molar mass of the volatile liquid was 95.9 g/mol. However, compared to the known value of 46.1 g of ethanol, the value measured had a 108% error. Unfortunately, this was a very big percent error and may have been caused by incorrectly measuring the volume of the gas. Using the ideal gas law, the molar mass of a volatile compound was calculated in order

According to research, once the chemicals are released into the air, water, or the soil, it can cause a decline in health, which can possibly result in death. About three quarters of the chemicals that comes out

If the IR spectra showed that it was an alcohol, Jones Test and Lucas Test can be used. If the IR spectra showed that it was either an aldehyde or ketone, we can use the DNP Test, Jones Test, and Tollens test, to determine which functional group is in the unknown. The IR Spectra can distinctively show the unknown as an alcohol, but cannot distinctively distinguish between aldehyde and ketone, because aldehyde and ketones have similar characteristic absorbances. Therefore, to distinguish between aldehyde and ketone, further chemical tests are needed. In the IR Spectra of unknown #305, it indicated that it was most likely an alcohol, due to the O-H peak at

to compare the results, and neither solution was expected to produce an observable chemical reaction. The procedure was the same as used for the test with 6M HNO3 and 0.1M AgNO3 solution and the test with 6M HCl and 0.1M BaCl2 solution. A third experiment used was the flame test. First, a scoopula was used to place 0.1 grams of the unknown compound in a test tube, and a wash bottle was used to add approximately 2 mL of deionized water to create a solution.

4. Remelt the contents of the tube and add the counterpart component based on the given schedule. Ask the demonstrator to adjust the cooling water between mixtures. During the experiment, record and plot the data obtained for all mixtures listed. The experiments are stopped as follows:

Due to its dense presence, the plant is capable of changing the water quality. It has the potential to alter the natural ecosystem and reduce the oxygen levels.

There are a lot of organic pollutants such as pesticides, pharmaceuticals and personal products that affect aquatic ecosystem. Some of things that can happen is, it can increase fish mortality, decrease plankton diversity and decrease growth of aquatic plants. Different chemicals were removed such as ibuprofen and fluoxetine and was observed with active and inactive duckweed. The results showed that the duckweed was impacted by the removal of chemicals. This experiment provided oversight of what chemicals do to the environment as well as how to screen for these different

First, Potassium Permanganate/ Baeyer test was performed to test for any unsaturation of double bond, triple bond, alcohol, and aldehyde. For this test, 2ml of 95% ethanol, 4 drops of unknown, and 2 drops of 1% KMnO4 solution were added in a small test tube. Color of solution was observed and recorded. Second, Chromic acid test was performed to find any presence of alcohol in the unknown solution. For which 1.0ml of acetone, 1 drop of unknown, and 1 drop of

In the preparation of Ethanoic acid with Ethanol, 1mL of Ethanol was first placed into a 50mL empty beaker and the odour and properties were observed. The Ethanol was a clear colourless liquid that smelt similar to a permanent marker. In daily life, Ethanol is used in alcohol drinks such as different types of liquors, it’s a solvent for paint, and is one of the important tools to get rid of air pollution from automobiles due to the fact that there is 35% oxygen in Ethanol, and the addition of oxygen to fuels accomplishes complete combustion, thus, minimizing harmful emissions. (Mueller). Nonetheless, Ethanol is miscible in water and could be biodegraded.

Addition reactions allow the reaction of two or more reactions to form into the adduct (the larger molecule formed). However, this only applies to compounds that have multiple bonds, for instance a double or triple bond. In this experiment, the reaction will be an addition of HBr to 1-hexene (an alkene). Both reactants are in reflux, which allows one to determine whether 1-bromohexane or 2-bromohexane is formed. In the reflux setup, 0.5 mL of 1-hexene, 2 mL of 48% HBr (aq), and 150 mg (0.15g) tetrabutylammonium bromide is added and then heated for two hours, along with stirring (using a spin vane).

Arson Detection : The Discovery of Flammable Liquids . In this practice , we analyzed flammable liquids by the method of gas chromatograph . First of all , we tried to find the retention time of standard flammable liquids to be able to identify our unknown sample comparing with their retention times . The standards samples were : charcoal lighter , gasoline , kerosene , light fluid , shellac thinner , and paint thinner . The retention time is calculated by the formula : We injected 5 (1)�L of paint thinner using the syringe needle into the gas chromatograph and we used the speed of 1cm/min to test which volume could be used . However , the pick was too high and we changed the volume (2)to 1 �L , which was better . With the parameters defined

During use, new oil picks up toxic chemicals, carcinogenic hydrocarbons, and heavy metals which harm the environment and public health when used oil is disposed of improperly. One pint of oil can produce a slick covering approximately one acre of water. Used oil in waterways threatens fish, waterfowl, insects and aquatic life. In salt water, oil kills the microscopic plankton and algae that form the base of the marine food web. Very small amounts of oil spilled in the habitat of fish and shellfish can contaminate their flavor. Used oil seeps through landfills and soils to contaminate groundwater supplies. One quart of oil can foul the taste and purity of 250,000 gallons of water. Used oil applied to roads as a dust suppressant causes water

According to the USDA the toxicity of the water hemlock is derived from an unsaturated aliphatic alcohol. It is most prevalent in the roots and stem of the plant and