Final Lab Report Essay example

The purpose of the lab was to determine the ratio of air to acetylene results in complete combustion of acetylene gas. The balanced chemical equation for this experiment was C2H2(g) + O2(g) --> CO2(g)+ H2O(l). Complete combustion is the reaction of an element or compound with oxygen to produce the most common oxides and energy. Complete combustion occurs when the fuel and oxygen combine in exact proportions to completely burn the fuel, which leaves a clean test tube. Incomplete combustion is the reaction of an element or compound with oxygen to produce some oxides with less oxygen than the most common oxides. Incomplete combustion occurs when there is not enough oxygen to react

For the second part of the experiment I cut the cheesecloth into four pieces and folded them so that it was four layers thick. I placed one piece of cheesecloth into the funnel and measured 60mL of soil using the 100mL to help measure the soil and poured that into the funnel. Taking beaker number one I poured the contents into the funnel and let that filter into beaker number five. I used the same technique as above and I repeated the same thing to beakers number two through four and poured them into beakers number six through eight. Once this was done I observed beakers five through eight and wrote down my observations in Table 1.

The number of electrons forming a charge cloud around the nucleus is (pick one of the following) greater than; equal to; smaller than the number of protons in the nucleus of the atom.

Paragraph 1 - How the Law of Conservation of Matter is supported by the experimental demonstrations: In the law of conservation particles and materials are neither created nor destroyed . It was similar towards the experimental demonstrations because nothing changed or destroyed in the processes .Kinetic and potential energy was used in the experiments.

There are three main mechanisms by which the chemical composition of groundwater, which is our natural source of drinking water, may be changed: by natural processes, by man's waste-disposal practices such as those for sanitary wastes, liquid industrial wastes, solid wastes, and radioactive wastes, and by spills, leaks, and agricultural activities and other sources unrelated to disposal. The degree of risk posed by contaminants varies according to many factors. These include the volume and toxicity of the contaminant, its concentration in the aquifer, its persistence in the environment, and the degree of human and environmental exposure to the contaminant. In addition, the number of persons affected, or likely to be affected, over time and the percentage of available groundwater both locally and regionally should be taken into consideration. If the contaminants in the groundwater exceed the standards set for drinking water by the federal government, for example, then the water is hazardous for the use for which it was designated under the standards. These standards include, however, only a limited number of chemicals, and thus they do not necessarily protect humans or the environment against either the short-term or the long-term effects of every contaminant that might be found in

groups. It was conducted to further the research in choice overload and paralysis of the mind.

The next step in this lab is to rinse the Erlenmeyer flask with distilled water down the drain and then repeat the experiment, this time adding 10 ml of 0.10M KI and 10 ml of distilled water to the flask instead. The flask should again be swirling to allow the solution to succumb to the same temperature as the water bath and once it has reached the same temperature, 10 ml of 3% H2O2 must then be added and a stopper must be immediately placed on the flask and recording should then begin for experiment two. After recording the times, the Erlenmeyer flask must then be rinsed again with distilled water down the drain. After rinsing the flask, the last part of the lab can now be performed. Experiment three is performed the same way, but instead, 20 ml of 0.10 ml M KI and 5 ml of distilled water will be added and after the swirling of the flask, 5 ml of 3% H2O2 will be added. After the times have been recorded, data collection should now be complete.

We placed 50 mL of vinegar, tap water, seawater into three respective beakers. 50 mL of seltzer water was placed into a jar with a lid

Table 1 Concentration of protein, DNA, and ratio of the two in heart, kidney and liver of bos taurus. Average standard deviation of protein concentration is also shown.

Preparation is a key to success in this lab. For this reason, you are required to thoroughly read through the experiment information presented in the lab manual, and complete a pre-lab for each experiment you do. The prelab must be completed prior to the day of the experiment. Each Friday I will ask to see your completed prelab before I allow you to enter the lab. If you have not finished the pre-lab, I will not allow you to enter the lab and you will receive a zero.

When Kate and I showed up to set up our new classroom before the new school year, and we discover the people before left a group of chemicals unlabelled. So to not waste supplies, we as experienced chemists must determine their identities so we can use them. My partner, Kate and I must identify a set of unknown chemicals with the knowledge we acquire by testing a set of known solutions and seeing if they form precipitation reactions, if yes what color do they turn. We will known if combining the solutions creates a reaction if one of the products is in a solid state. To determine the identities, we must conduct an experiment.

Everyday pesticides are dumped into our environment. Over time most of the pesticides make thier way to a source of water, whether it's groundwater or a body of water. According to Lewis Regenstein author of "America the Poisoned" two thirds of the nation's lakes have serious pollution problems. 80% of 3,700 urban lakes in the United States are destroyed. More than 94 million residents could use these lakes for recreational use or for a source of water (169). Cincinnati's drinking water contains about 700 chemicals. 90% of them did not exist 20 years ago. The main sources of most of these chemical pollutants are municipal sewage, industrial discharges, and runoffs from farming areas. There are also several other chemicals in America's drinking water. Although hazardous, there are approximately 60 chemicals that are mixed into water in the process of treating it. Unlike rivers or lakes, underground supplies are not processed at treatment plants before being used by humans. "More than one hundred million of our citizens depend in a whole or in part on underground as sources of drinking water (Beck qtd. in Regenstein 172). Once groundwater becomes contaminated, there is usually no way to clean it.

Experiment Two In experiment two, the materials needed were 100 milliliters of potting soil, two 250 milliliter beakers, two 100 milliliter beakers, forty milliliters of sand, twenty milliliters of activated charcoal, sixty milliliters of gravel, ten grams of alum, a funnel, the remaining piece of cheesecloth from the previous experiment, bleach, a stopwatch, and water. After adding 100 milliliters of soil into the first 250 milliliter beaker, the beaker was filled with water until there was 200 milliliters of material in it. The soil solution was then passed between the two 250 milliliter beakers for fifteen minutes.

The purpose of this report is to confirm the lithology and porosity of the reservoir for my company, which is considering a water flood on a reservoir overlain by a shale seal. Also to investigate the mechanical properties of the shale seal. ∅=(∆t-∆t_ma)/(∆t_f-∆t_ma ) ………………..……......……………(1) Firstly, the saltwater neutron-density cross plot from the Schlumberger chart book was used to find the porosity and lithology of the reservoir. Figure 1 shows the usage of the neutron-density cross plot and by that the porosity was found to be 17% and the lithology was read to be quartz sandstone.

Interactions between groundwater and surface water are complex. Consequently, groundwater pollution, sometimes referred to as groundwater contamination, is not as easily classified as surface water pollution.[7] By its very nature, groundwater aquifers are susceptible to contamination from sources that may not directly affect surface water bodies, and the distinction of point vs. non-point source may be irrelevant. A spill or ongoing releases of chemical or radionuclide contaminants into soil (located away from a surface water body) may not create point source or non-point source pollution, but can contaminate the aquifer below, defined as a toxin plume. The movement of the plume, a plume front, can be part of a Hydrological transport model or Groundwater model. Analysis of groundwater contamination may focus on the soil characteristics and site geology, hydrogeology, hydrology, and the nature of the contaminants.