Prelab In you lab notebook, write a purpose/overview for this experiment. Includ

Question

Prelab In you lab notebook, write a purpose/overview for this experiment. Include the chemical reaction. Make a table of reagents showing the structure, MM, mp, and bp for the following reagents: benzhydrol, ethyl acetate, glacial acetic acid, sodium hypochlorite, and benzophenone. 1. What is the purpose of the KI-starch paper in this experiment? How does this paper work? (You may need to search online to find this answer.) 2. Look up the "Twelve Principles of Green Chemistry" on Wikipedia. Which one of these twelve principles is demonstrated by this experiment? (Write out the entire principle.) 3. A student is monitoring a reaction between reactants A and B. She prepares and develops the TLC plate shown below, in which spots A and B are the pure compounds A and B, and spots 15, 30, and 45 are the reaction mixture after 15, 30, and 45 minutes. Interpret these results. What does this TLC tell you? Be as specific as possible. A B 15 30 45

Explanation / Answer

3. In the question mentioned above, A and B are pure compounds, after fifteen minutes the reaction mixture contains only the starting compunds as indicated in TLC, and after 30 minutes, product formatio takes place along with the starting compounds, but after 45 minutes, the intensity of product formation increases and stil the compound B slightly present along with the product.

2. thin layer chromatography follows three R philosophy, reduce, recycle and reuse and it also follows twelve principles of green chemistry.

1. KI starch paper allows easy detection of strong oxidizers such as nitite and free chlorine and also used to control diazotisation reactions. nitrite or free chlorine oxidises KI to form elemental iodine which react with starch to a blue violet complex.

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