EX-15 Proposal.docx - Analyzing the Composition and Purity...

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Analyzing the Composition and Purity of Baking Soda Loreta Grazhees Savannah  Lab Section 007 Sept 16, 2016
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Introduction  The Atheneum Baking soda company is seeking to hire quality control sci- entists to analyze the baking soda that they produce. The interview includes a  process for the candidates to analyze their products for purity of a sample of bak- ing soda, the purity of which is only known by the company. After analyzing the  baking soda, if it is found to have any impurities, the applicant must determine  what impurities have been found in the sample and which ones exist. At Atheneum Baking Soda, baking soda is produced by reacting ammo- nium hydrogen carbonate with brine, as shown below. NH4HCO3 + NaCl —> NaHCO3 + NH4Cl The ending product is made by drying out the brine water and ammonium hydro- gen solution and then filtering out the solid that is left. Therefore, the contaminants that  may be present in the final product is KCl, LiCl, and CaCl2. It’s important to do so, and  analyze the purity of a substance and any contaminant to determine the identity of each.  Knowing the purity of a substance such as baking soda, and the identity of the contami- nants is important to ensure that the product being sold is advertised correctly, and that  it will work for the purpose it is intended for. This experiment will determine if the baking  soda that is produced, is safe enough to distribute to the public.  Many techniques will be performed in this experiment starting off. Titration (also  known as titrimetry) is a common laboratory method of quantitive chemical analysis that  will be used to determine how pure the baking soda really is. This method analysis will 
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allow you determine the precise endpoint of a reaction and therefore a precise quantity  of a reaction in the flask. Two solutions will be compared and added together. A known  and an unknown. This will determine the final pH being measured. When the reaction is  complete the final solutions being added is recorded using the following equation  (M1) (V1)=(M2)(V2).  We can then use the mole ratio found by analyzing the chemical equa- tion. After finding the number of moles of the unknown solution the percent by mass can  be determined using the following equation,  Percent solute = grams of solute/grams of  solution x 100%.  A known concentration of HCl will be suspended over a breaker con- taining the baking soda solution, with a known amount of baking soda dissolved in dis- tilled water. A pH probe will then be placed and drop counter will be connected to the  MeasureNet station prior to beginning the titration process. When the pH level increases 
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