IIn order to develop the design of experiments we first developed fish bone diagram and based on that we developed a matrix of possible experiments using Taguchi design explained elsewhere [11].
The fish bone analysis turned out to be as follows:-
Following aspects have already been covered in research work done by earlier scientists:-
It had already been investigated activity followed the order; Co2(CO)8 > Co(NO3)2> Co(CH3COO)2 while chain growth probability followed the sequence Co(NO3)2 > Co2( CO)8 > Co(CH3COO)2 [6]. Based on these findings Co(NO3)2 was a preferred precursor salt. Salt concentration was based on the solubility in water (134 g/100ml) and ethanol (9g/100ml). Usually a base is used as the precipitation agent (by adjusting the pH of the system). Urea has been used earlier in different experiments because its hydrolysis is slow but rapidly precipitates [12].
Prior work has identified that surface properties of silica support, its interaction with the precursor solvent, and system pH have strong influence on the dispersion of catalyst. Ho et al [13] observed that when ethanol is used as the solvent instead of water for cobalt nitrate there is an increase of dispersion while retaining the high extent of reduction. They proposed that ethoxy (-OCH2CH3) group on the silica gel during the impregnation might hinder the aggregation of CO3O4 by physical interference during the thermal decomposition of cobalt nitrate as well as affects sintering process during reduction. It has also been reported that water as a solvent formed a glassy immobilized layer as a result of hydrogen bonding with silanol groups on the silica surface [14].
Drying rate was adjusted in order to ensure the stability ...
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...t even been added).
Experiment PrSl PrEv DrRt CalEv RdRt
1 -1 -1 -1 -1 -1
2 -1 -1 +1 -1 -1
3 -1 -1 -1 +1 -1
4 -1 -1 +1 -1 +1
5 -1 -1 +1 +1 -1
6 -1 +1 -1 -1 -1
7 -1 +1 -1 +1 -1
8 -1 +1 +1 -1 +1
9 -1 +1 +1 +1 +1
10 +1 +1 +1 -1 -1
11 +1 -1 -1 -1 +1
12 +1 -1 -1 +1 +1
13 +1 -1 +1 -1 -1
14 +1 -1 +1 +1 -1
15 +1 +1 -1 -1 +1
16 +1 +1 -1 +1 +1
17 +1 +1 +1 +1 -1
While selecting the final set of experiments we limited the scope of work to the effect of change in solvent and the change in precipitation/calcination environment (sample 2, 5, 10, 17). Our set of experiment reduced to four as shown in table 3. Such an arranged will step wise identify the impact of these factors on the final metal distribution.
The purpose for this experiment was to determine why it was not possible to obtain a high percent yield when Calcium Nitrate Ca(〖NO_3)〗_2 with a concentration of 0.101 M was mixed with Potassium Iodate KIO_3 with concentration of 0.100 M at varying volumes yielding Calcium Iodate precipitate and Potassium Nitrate. Filtration was used to filter the precipitates of the solutions. The percent yield for solution 1 was 87.7%, and the percent yield for solution 2 was 70.8%. It was not possible to obtain a high percent yield because Calcium Iodate is not completely soluble and some of the precipitates might have been rinsed back to the filtrates when ethanol was used to remove water molecules in the precipitate.
The purpose for this lab was to use aluminum from a soda can to form a chemical compound known as hydrated potassium aluminum sulfate. In the lab aluminum waste were dissolved in KOH or potassium sulfide to form a complex alum. The solution was then filtered through gravity filtration to remove any solid material. 25 mLs of sulfuric acid was then added while gently boiling the solution resulting in crystals forming after cooling in an ice bath. The product was then collected and filter through vacuum filtration. Lastly, crystals were collected and weighed on a scale.
The complete experimental procedure is available in the General Chemistry Laboratory Manual for CSU Bakersfield, CHEM 213, pages 20-22, 24-25. Experimental data are recorded on the attached data pages.
Imagine a teenage boy who is isolated on a faraway island, without food or water. The hot and sticky weather is intolerable, but the rampaging storms are worse. He quickly develops malaria and diarrhea, and on top of that, blood-sucking insects and menacing reptiles lurch beneath his feet. He has no idea what is coming, but he needs to survive. This is the story of a young boy who has to travel to the other side of the world to realize that everything can’t go his way.
Blackfish is a 2013 documentary directed and written by Gabriela Cowperthwaite. The film regards the effects that captivity has on killer whales, with a focus on a SeaWorld orca named Tilikum. Born in 1981, Tilikum was captured at the age of two off the coast of Iceland and taken to Sealand of the Pacific in British Columbia, Canada. 8 years later, Keltie Byrnes, a marine biology student and part time Sealand trainer, slipped into the pool containing Tilikum and two female whales. The three orcas submerged and dragged Byrnes around the pool, resulting in her death. Shortly thereafter, Tilikum was moved to SeaWorld in Orlando, Florida, where he killed two more people. Charles P. Dukes was found dead, draped over Tilikum’s back, in 1999 after evading security and entering the orca tank. Dawn Brancheau, a veteran trainer, was killed during a post-show routine when Tilikum pulled her into the
A precipitation reaction can occur when two ionic compounds react and produce an insoluble solid. A precipitate is the result of this reaction. This experiment demonstrates how different compounds, react with each other; specifically relating to the solubility of the compounds involved. The independent variable, will be the changing of the various chemical solutions that were mixed in order to produce different results. Conversely the dependent variable will be the result of the independent variable, these include the precipitates formed, and the changes that can be observed after the experiment has been conducted. The controlled variable will be the measurement of ten droplets per test tube.
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As the end of high school draws near for me, I wonder how much have I learned the past few years? How much have I grown and have I evolved into a better person than I was before? Many adolescents and preteens go through a phase where they realize a truth in their life, and that becomes the catalysts of their growth into adulthood. Rule of The Bone by Russell Banks included a main character called Bone, he was a disturbed child named Chappie whose early life consisted with alot of alcoholic and child abuse. While in The Absolutely True Diary of a Part-Time Indian by Sherman Alexie, a boy named Arnold Spirit is grown into a neighborhood of heavy alcoholic abuse and hopelessness. Both were heavily influenced by their childhood, but as each boy
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Predictions may be made about the suitability of possible catalysts by assuming that the mechanism of catalysis consists of two stages, either of which can be first: