CHEM 245 Lecture Notes - Lecture 7: Sodium Nitrite, Nylon, Hydrochloric Acid
8 Mar 2016
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Document Summary
Spring 2015: experiment 7-synthesis of methyl orange. (90 points) Lab day and time wednesday and friday 11am 2pm. Abstract-including weight (g) of product obtained, % yield and melting point of material. Overall reaction scheme showing formula weights and molecular formulae of organic substrates. Experimental procedure- it is ok to say that the experiment was carried out according to the procedure in the lab manual and list any changes to this procedure. In this experiment, methyl orange was prepared by diazotization of sulfanilic acid and couple reaction with n,n- dimethylaniline. A small yield of 15% was obtained with 0. 3 grams methyl orange. A fabric strip was used to show methyl orange as a fabric dye. Lastly, methyl orange was used as a ph indicator while the solution went from acidic to basic gradually. Methyl orange is a useful indicator for determining ph in the 3-5 ranges. Azo compounds are popular in what gives color to clothing.
