% Mgo Determination Free Essays

Vu Ngo % MgO Determination September 10, 2012 Procedure: Reference to lab manual Data: Mass of Na2EDTA†¢2H2O, g| . 9289| Standardization of EDTA Solution | Trial 1| Trial 2| Final buret perusing, EDTA (mL)| 18. 5| 36. We will compose a custom exposition test on % Mgo Determination or then again any comparable subject just for you Request Now 7| Initial buret perusing, EDTA(mL)| 0. 5| 18. 5| Determination of % MgO of Unknown Number | 4J| | Sample 1| Sample 2| Sample 3| Mass of test (g)| 0. 2135| 0. 2132| 0. 2139| Final buret perusing, EDTA (mL)| 73. 5| 74. 2| 74. 2| Initial buret perusing, EDTA(mL)| 0. 5| 0| Measurement of water clear Final buret perusing, EDTA(mL)| 14. 5| Initial buret perusing, EDTA(mL)| 14. 2| Sample Calculation: Given: Molar mass of Na2EDTA*2H2O, g/mol| 372. 25| Expected M of EDTA arrangement, mol/L (M)| 0. 01| Concentration of Zn2+, (M)| 0. 0125| 10mL*1L1000mL= 0. 01L C1V1=C2V2 .0125M. 010L)=C2(. 018L) C2=. 0125M*. 0100L. 0180L=. 00694M .00694M+. 0687M2=. 00691M C2=. 00691M. 073=5. 04*10-4mol %MgO=5. 04*10-4mol40. 05. 2135g*100=9. 51% Results: Standardization of EDTA Solution | Trial 1| Trial 2| Volume utilized, EDTA(mL)| 18. 0| 18. 2| Molarity of EDTA arrangement, (M)| 0. 00694| 0. 00687| Average Molarity of EDTA arrangement, (M)| 0. 00691| Determination of % MgO of Unknown | Sample 1| Sample 2| Sample 3| Volume utilized, EDTA (mL)| 73. | 74. 2| 74. 2| Mole of Mg2+in sample| 5. 04E-04| 5. 12E-04| 5. 12E-04| % of MgO in test, %| 9. 52| 9. 69| 9. 66| Average % of MgO in test, %| 9. 62| Error Analysis: The estimation of the example in gram, have +/ - . 0001g blunder. The estimation utilizing the buret have a +/ - . 1mL mistake. These kinds of estimation mistake depend on the affectability of the instrument, during the estimation. These mistakes could make the outcome go amiss from the genuine answer. During the analysis, utilizing titration to discover the end point. In light of the end point was obscure, a solitary drop could decide its end point. There may be an additional drop that made the information fluctuate as the two pieces of the trial have decided. The main preliminary of both the examination, the number is unique, in light of the uncertain number of drops. Utilizing the outcome from the primary preliminary, the aftereffect of the subsequent preliminary was increasingly precise. As demonstrated from the test of assurance of percent of MgO of the obscure. The example 2 and test 3 testing brings about comparability that contrast from the example one. The example utilized 73. 0 ml of the EDTA arrangement, while the two examples 2 and 3 utilized 74. 2 ml of EDTA arrangement. This will cause a tip in the outcome toward a lower number used to discover the end point. This mistake is certainly not a main consideration since it is just of my 1. 2 ml of the genuine outcome. The percent of each of the three aftereffect of MgO is diverse under 1 percent unique. In this manner, a truly sensible outcome in every one of the three of the test. Conversation: This analysis is to assist us with understanding the response between an anion and the metal cation. It exhibited the Lewis base comprehension of ethylenediaminetetraacetic corrosive (EDTA). The objective was accomplished through titration of the example in numerous preliminaries so as to discover its endpoint. The end point was discovered when the pink tinge, due to EBT was included, transform into a blue/violet shading. This connoted its endpoint of the example. The outcome is acceptable quality, due to the deviation from the principal preliminary and last preliminary that was done on a similar example. The outcome is off by . 2ml in the normalization of EDTA arrangement. In the second piece of the assurance of % MgO of the obscure; the principal, second, and third example the rate dislodges is well under 1% contrast. The outcome is worth 99% sure that the outcome is acceptable quality, as a result of the consistency of the information. The most effective method to refer to % Mgo Determination, Papers

How to Refinish Hardwood Floors Research Paper Example | Topics and Well Written Essays - 500 words

Step by step instructions to Refinish Hardwood Floors - Research Paper Example A few stories become meager when they have been restored a great deal of times in light of the fact that after various revamping, there is no layer left on it to be evacuated. Along these lines, before restoring, consider whether your floor is in acceptable condition to sand. 2. Mastermind the Equipment. Get a belt sander in the event that you can in light of the fact that it is simpler to deal with. Drum sander isn't just heavier to convey yet additionally it is well-suited to make grooves on the wood which are difficult to evacuate. An edge sander should likewise be promptly accessible to reach in alcoves and corners of the room where a belt sander doesn't reach without any problem. Other hardware that you need is a clay blade, scrubber, cushion, wellbeing veils, eye assurance, brush, and froth tools. 3. Set up the floor for sanding by evacuating all furnishings, heat meshes, rugs, and old nails. Mop the floor since it must be dust cleaned before sanding. Try not to go for wood clay on delicate floors since profound gouges and splits in delicate woods would require supplanting entire boards. 5. Begin sanding from the least observable region to get simple with the sander. Concentrate. Spot the sander forward and sand alongside the floor’s grain. Begin sanding near the dividers, sanding the two advances and in reverse. Beginning sanding will just expel the layer of old completion. Utilize the edge sander to arrive at the territories the belt sander had not reached. A drum sander will have a 20-36 coarseness paper in it now. 6. Sand once more, moving in reverse, forward, left and right movement. It will evacuate the scratches that the first sanding left on the floor. This time, a drum sander ought to have a 80 coarseness paper. Select a fitting bearing relying on the look and feel. The edge sander should likewise have a 80 coarseness paper in it. 8. Pick a completion. Polyurethane stain which is either water-based or oil-based, or Osmo Hard Wax Oil, is utilized typically. The completion can be gleaming or matte. Silk finish is favored on the grounds that it is known to shroud the imperfections

How to Write the Tulane Supplement 2019-2020 TKG

How to Write the Tulane Supplement 2019-2020 Tulane is a private research university in New Orleans, Louisiana. Just over 8,500 undergraduates attend the school and the average class size is 21 students. Tulane is hugely involved with the community in New Orleans, and service work is an academic requirement. Tulane’s acceptance rate has been dropping rapidly over the past few years. Last year, it was 13%.  Before we begin, we have three bones to pick with Tulane’s supplement. The first prompt is not optional. That’s a trap. There is no such thing as an optional prompt for a school with a 13% acceptance rate. They just want some people to think that so they have a bigger applicant pool. And @Tulane, saying this prompt is “optional” is a pretty obvious and transparent way to juice your numbers. If we’re wrong, please send us the percentage of students accepted who did not write this supplement. The range of the first prompt is 50-800 words. We called the school to ask about the ridiculously wide range, and they said that they want to give students “as much or as little room as possible to express themselves.” It’s completely unfair to do this to teenagers. Our advice to Tulane is to cut the range and provide a word count. 800 words is longer than the common app essay, and suggesting that you can write that much is anxiety inducing for students. We suggest a response of around 500 words for our clients. It’s enough to get your point across (wrapped up in a story about yourself,) and should cut out all of the unnecessary findings you’re stretching to make relevant. Tulane has a hidden supplement. It’s in the activities section. Can schools please start putting all of the supplemental questions under the “Writing” section?  Anyway… the two prompts are broken down below: Please describe why you are interested in attending Tulane University (optional). 50-800 words.Again, not optional.This “Why Tulane” prompt is very straightforward. Your response should include: Your intended major Two upper level courses you want to takeA professor you’d like to work with An extracurricular activity you’d like to joinSOMETHING ABOUT NEW ORLEANS (More on this later) Start by looking at the list of majors available at Tulane. They have a lot. Pick a major that makes sense within the context of the rest of your application, so look at courses that you’ve done well in during high school and find something that aligns with that. You can’t say that you’re undecided because Tulane needs to balance their class, and they want to know that you have a plan. Let’s say that you pick Art History because you’ve done well in Art, worked at a gallery, and did an art focused summer program last year. Then look at the course catalogue and find two upper level courses (2000-3000) that you want to take. Skip over the introductory level courses because those are not Tulane specific. Don’t just name the courses, explain why you want to take them. Perhaps you read an interestin g book or can relate it to course work or job/internship experience. Next, find a professor whose work and/or research you find interesting. Pitch yourself as their next research assistant by telling them how you’re familiar with an area within their expertise. You now need to consider how you’ll be spending your time outside of the classroom. Tulane has over 200 student organizations, so look at their clubs and activities. You’re searching for something that is an extension of what you’ve done in high school. Once you get in, you can join any club you want. But for now, you need to find something that meshes well with the picture you’ve painted of yourself with the rest of your application.  You can’t submit a Tulane application without talking about New Orleans. The city and the school are deeply intertwined, and not mentioning the school’s setting in your supplement would look like a complete oversight on your end. Of course, this part is easier to write if you’v e visited the school. If not, Google is your best friend. Look into the ways in which Tulane is associated with New Orleans (there are a lot) and find something that speaks to you. You just did a lot of research. Congrats! Now look at your findings. Compare it to the list at the top of this document to make sure you have everything. Your next task is to tell a story about yourself with your Tulane facts weaved throughout. The goal is to prove that there is a strong link between your interests and Tulane’s offerings. This goes back to the original question: If you can study Art History anywhere, why Tulane? Think about your origin story, which is a story about how your academic interests came to fruition. Maybe there was a project or extracurricular activity you did that was the impetus for applying to Tulane. Whatever you choose, make sure that the story has a beginning, middle, and end. And remember, cap it around 500 words. Please briefly elaborate on one of your extracurricular activities or work experiences. (250 words)The second (and hidden) supplement requires no research. Tulane wants another glimpse into your life. The best way to go about this question is to think about meaningful work or extracurricular activity related experiences that you’ve had. The key word here is meaningful. Don’t write about what you think sounds most impressive. Again, both answers (work or extracurricular) should come in the form of a story with a beginning, middle, and end. If you’re writing about work, think about memorable days on the job. Why do they stick out in your mind? Tell them the story of that day. The job that you choose to write about can be literally anything. If you’ve never had a job or would prefer to write about an extracurricular, make sure that you’re writing about activity that you cared about for longer than a day. You should be really committed to it and passionate about it. Tell them a story that you think exemplifies what it’s like to be a member of X club. Researching can be overwhelming, but we can help. Contact us here if you’re lost in the sauce.