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Lecture 10 unknowns 04092010

Lecture 10 unknowns 04092010 - Lecture#10 Qualitative...

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Lecture #10 – Qualitative Organic Analysis of Unknown Solids and Liquids Alcohols Carboxylic Acids Ketones Aldehydes Amines Phenols
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Unknowns ?????????????? ?????????????? ?????????????
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Catch Phrases of the Lab “Be Observant!!” “Be Careful” And “Be Flexible!!”
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Welcome to the Unknowns Lab!!!!   Now is the time that you are going  to put ALL of your new-found lab  skills to good use! Welcome to the  world of scientific investigation!
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Responsibility and Independence    Since you will all have different  compounds and you will all be  performing different tests and getting  different results. Therefore, the assigned  reading is very valuable!!!
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SAFETY Despite the fact that the compounds are  known to me, THEY ARE UNKNOWN  TO YOU! YOU NEED TO TREAT EVERYTHING  AS IF IT WERE THE WORST THING  YOU HAVE EVER WORKED WITH! Proper gloves, goggles (and NO  contacts), labcoats, clothing and shoes!
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Honor Code You are all expected to do your OWN work You will work at your OWN pace You are to write up your OWN report You are working on your OWN unknown
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How do I prepare? READ!!!! You should do the reading for each test as  well as the background reading in Mohrig Go over the recrystallization, boiling point,  NMR and IR sections in Mohrig It gives a very helpful overview guide to the  identification of unknowns
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What should I expect? 5 mL of a liquid and 3 g of a solid Some are more dense and more compact Vials will be labeled with a code Expect to work hard Expect that you will be VERY  successful!! Who knows…you may even enjoy it    (a  little) 
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What functional groups are going to be present in my unknowns? Amines Aldehydes Ketones Phenols Alcohols Carboxy groups (acids, amides, esters) Some compounds may have two!
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What do the TAs do??? They make sure that you:  do not hurt yourself do not set fire to the lab, yourself or your  peers have the equipment and chemicals that you  need are wearing your safety glasses and that you  are  not  wearing open-toed shoes or shorts Be sure that you are there on the right day  and only the right day  
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What do the TAs NOT do??? They have been instructed NOT to  answer questions for which you should  have the answers. “What do I do first?” “I added this and it turned blue. Is that  ok?” “Is this the right answer?” Remember…they have NO idea what  compounds you have!
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Your job….
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