The purpose of the lab is to acquire the percent composition of zinc and copper. The procedure included obtaining a post 1983 penny and washing it with soap and water. Using a triangular file, we made an X on the penny. Then, we cleaned the top and bottom of the penny with steel wool until it was shiny. We rinsed the penny in acetone and dried it with paper towel.
Diluents do not react in alkylation chemistry, but they take up space and decrease the effective area for isobutane and olefin to contact. With less contact, side reactions like polymerization are more likely to occur; polymerization reactions are a direct acid consumer. Comparing the FCCU and Coker BB, Coker BB contains far more contaminants and diluents than FCCU BB (see Table 2, pg.4). By lowering the amount of contaminants and diluents, acid consumption reduced 0.2
Have you ever gone to a cooler and inside it was cold? Have you ever wondered why? Well, Mrs. Houghton, my 6th grade teacher asked us the same questions and wanted us to figure it out. So, she gave us an assignment that would help us learn why this happens. The assignment was that we had to build a container to keep an ice cube cold for as long as possible.
It is more important to give a special kind of attention to the corrosion behavior differences of the coatings, to ensure that the new coating is an acceptable as alternative. For instance, recently many zinc-nickel alloys have been utilized for replacing cadmium layers but due to their difference in corrosion behavior, various issues arise. Zinc-nickel alloys exhibit confined corrosion and cracking, whereas cadmium layers are susceptible to uniform corrosion. Anyhow the dissimilarities in corrosion behavior will play a vital role when providing the necessary corrosion protection
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We then slowly added 25ml of chilled deionised water to the filtrate to initiate crystallization by using a measuring cylinder and a dropping pipette, once we had done this we left it for about 10 minutes to allow crystallization at room temperature. We then weighed a filter paper which we will use later in the experiment. We then collected the crystallized acetylsalicylic acid by vacuum filtration in a Buchner funnel and washed the product with a little ice-cold water. We then pre-weighed a clean, empty watch glass and labelled it with our initials and the date, we did this do we could easily identify that it was ours when we go to weigh it with the crystals on. We
In this lab, genes for a fluorescent green protein (GFP) and antibacterial resistance (ARG) were inserted into E. coli bacteria. E. coli bacteria was resuspended in an ice-cold CaCl2 solution. DNA containing GFP and ARG was added to half of the cells before they were “heat shocked” in an ice bath and hot water. The heat shocking made the bacteria’s cell membrane more porous, so the DNA could enter. Recovery broth was added to the cell suspension, and the bacteria was placed in warm water for about thirty minutes (see Results and Discussion, paragraph 2).
Water was removed from the dish, and the Cu was then washed thrice with 5 mL deionized water, and decanted between washings. It was then similarly washed thrice with 5 mL of ethanol. The evaporating dish was then placed on the steam bath to dry until the Cu had a sand-like texture. The bottom of the dish was dried, it was cooled to room temperature, and then its mass was measured and recorded. All the solutions were disposed of in the liquid waste container, the Cu and Al were disposed of in the solid waste container, and the apparatus was cleaned and put
The kid 's dental practitioner can show the best possible approach to clean a youngster 's teeth, a technique that as a rule takes under two minutes with a little tyke 's toothbrush or by basically wiping the teeth off with a wet fabric. Even these dental discount plans were not limited upto adults they also covers infants which were use to protect the loss of tooth decay in