involves two oxidation-reduction reactions to calculate the oxidizing capacity of a sample of unknown bleach. In order to determine the volume of Na2S2O3 added‚ students will conduct a titration of bleach with thiosulfate with addition of a starch indicator to find the end point of the titration. Moreover‚ the oxidizing capacity of bleach is calculated with the percentage by mass of NaOCl in the unknown bleach sample. The overall chemical reaction throughout the experiment will be balanced with the
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many class lab days‚ I concluded my unknown was Calcium Carbonate due to results from the Flame Test and Anion I Test. Throughout our lab days‚ my friends would help me determine various odors and colors of the substances which allowed me to confirm my answer. Also‚ I looked select test results up on the internet to see if they matched my observations. On our first lab day‚ I received my bottle and noticed a white precipitate in the bottom therefore‚ my unknown was insoluble. I started my testing
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Pollution problems that are serious but that are relatively unknown Many kinds of pollution exist worldwide. Many familiar pollution problems are known to many people such as pollution from the garbage‚ air pollution from cars and industry‚ pollution released into water from the factories and so on. There are many occurring spots worldwide that serious pollution problems have taken place‚ but do you wonder where those places are? Some of the significant scenes are worth knowing. Here are some scenes
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Identifying an Unknown Aldehyde or Ketone Introduction The purpose of this lab is to identify an unknown aldehyde or ketone substance using chemical tests. The chemical tests used in this experiment are solubility‚ Schiff‚ Bisulfite‚ and Iodoform tests. Also‚ a 2‚4-dinitrophenylhydrazone derivative synthesis reaction will be completed from which a melting point will be obtained. The chemical test results and the melting point analysis will be compared to the table of compounds given to find the
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performed this test‚ the initially slant for unknown microorganism #17 is important. For this lab‚ two identical slants are used for two reasons. Firstly‚ the slant can be used to make sure that there is no contamination from the Nutrient Agar plate. Secondly‚ the second slant will become a stock culture to prevent the shortage of slants during performing the series of tests. Kliger’s Iron Agar tests can be used to determine multiple characteristics of unknown microorganism #17. Kliger’s Iron Agar slants
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My first source for evaluation is a secondary source that is an online article‚ “The Unknown Clara Bow”. This article was written by William Cramer on February 24‚ 1998. Cramer’s purpose of this article was to educate and inform those who are interested in learning about flapper culture and‚ more specifically‚ Clara Bow. Cramer contains detailed knowledge of Bow through many sources‚ which he has cited on his website‚ from authors and historians who have focused on the 1920s with credible references
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Experimental Part 1: Reaction First the glassware apparatus for the reaction was set up. 3.861-grams of isoborneol‚ 2.21-mL of glacial acetic acid‚ and 4.39-mL of 6% NaOCl solution were mixed in a 125-mL Erlenmeyer flask. Another 35-mL of 6% NaOCl solution was added to a separatory funnel and supported over the flask. The NaOCl in the sep funnel was slowly added into the Erlenmeyer flask with vigorous swirling‚ approximately 2-mL every 30 seconds until all the NaOCl from the sep funnel had been
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EIGHTH GRADE SUGGESTED SUMMER READING BRAGG MIDDLE SCHOOL Gardendale‚ Alabama 2011-2012 FICTION Austen‚ Jane. Pride and Prejudice. In early 19th-century England‚ a spirited young woman copes with the courtship of a snobbish gentleman as well as the romantic entanglements of her four sisters. AR 27.0/Level 12.0. Classic Fiction. Avi. Crispin: the Cross of Lead. Falsely accused of theft and murder‚ an orphaned peasant boy in 14th-century England flees his village and meets a larger-than-life
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Case Study Report for Unknown #49 A new school for girls was opened in a larger village in Northern Pakistan‚ and the teachers were proud to have convinced many families in the surrounding villages to allow their daughters a basic education. The school was a success‚ and the 6-10 year olds girls quickly learned how to read and write and were even instructed in the sciences. However‚ 2 weeks before summer break‚ many of the girls and the teacher developed breathing problems that included severe coughing
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After reading “Naema-Whereabouts Unknown” I chose to select study question number four. It asks us if we felt the diary form is an effective way of documenting the psychological impact of historical events that we may experience. My answer to this is yes. I do believe it does. Let me expand. We can never truly have the full experience someone feels emotionally during an event. Even if you and I were right there next to the narrator we wouldn’t. We all experience and feel things differently. The
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