Chemistry : The Chemical Equilibrium State

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Introduction Analytical chemistry was used for this project to determine the level of the reaction Fe3+ + SCN- ↔ FeSCN2+. According to ACS Chemistry for Life, “analytical chemistry is the science of obtaining, processing, and communicating information about the composition and structure of matter” (Analytical Chemistry). In this experiment the interaction of iron(III) (Fe3+) and thiocyanate (SCN-) formed, which was processed and now being communicated through the quantitative data collected. Chemical reactions are constantly moving forward towards the products side as well as in reverse towards the reactants side and at times when both are done shifting the reaction is said to have come close to “completion or equilibrium” (“Determining…show more content…
Methods Week 1 To create solutions, 4.837 grams of Fe(NO3)3 was measured out along with, 0.0194 grams KSCN and 50 mL of HNO3. [Note: According to Sigma-Aldrich MSDS, “iron(III) nitrate (Fe(NO3)3) hazardous warnings are; may intensify fire keep away from heat and avoid mixing with combustibles, may cause skin, eye, and respiratory irritation,” “potassium thiocyanate (KSCN) hazardous warnings are; harmful if swallowed, in contact with skin, or inhaled,” “nitric acid (HNO3) hazardous warnings are; may intensify fire keep away from heat and avoid mixing with combustibles, causes severe skin burns and eye damage.” (Sigma-Aldrich, 2014)]. A 100mL volumetric flask was used to create diluted solutions. The first dilution was composed of 4.837g of Fe(NO3)3 and the rest deionized water. After the first sample was created, it was poured in a beaker and set aside while the flask was being rinsed out to make sure none of the solutions were contaminated. The second dilution was composed of 0.0194g of KSCN and the rest of the volumetric flask was filled to the line with deionized water. After the second sample was created it was poured in a beaker and set aside while the flask was being rinsed out. Lastly, 50mL of HNO3, was added to the 100mL volumetric flask and the rest of the flask was filled to the line with deionized water. After the last solution was
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