report 4 acid base - Ricke, Matthew UNIVERSITY OF KANSAS -...

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Ricke, Matthew UNIVERSITY OF KANSAS - 2010 Organic Chemistry I Lab Lab 4: “Acid-Base Extraction” Ricke, Matthew 9/28/2010 1
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Signature ______________________ Grade : __________ / __________ (TA Use only) (s) (s) p-nitroaniline (s) (s) Dry,evaporate (aq) (aq) (s) 10mL of 6M NaOH 10mL of 6M HCl 10mL of H 2 O, 5mL of 6M NaOH p-nitroaniline (aq) p-nitroaniline (s) 10mL H 2 0, 5mL of 6M HCl [Comments] TA: Joseph Barlan | CHEM625 – Section 13749 | AM | Date Submitted: 10/07/2010
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Ricke, Matthew Introduction The objective of this lab is to separate a mixture of benzoic acid, p-nitroaniline, and napthalene by performing a base extraction and an acid extraction to neutralize each which also will isolate the compounds. Then, obtain the melting point range and percent yield of each. To isolate these compounds extraction, filtration, evaporation and recrystalization techniques will be used. Extraction is a separation technique based on adifference in solubilities of a compound A it’s between two immiscible phases (liquid-liquid or a liquid-solid(Hanson). Solubility allows the separation of the insoluble organic compounds and this is shown with a water soluble aqueous layer. A compound is water soluble if its function group has less than 5 carbon atoms surrounding it. Sometimes this separation causes an Emulsion to form. An emulsion is a suspension of insoluble droplets of liquid in another liquid (Mohrig). Filtration will be used to separate a product solution from a drying agent and also it will be used to separate a solid product from a recrystalization solution. Evaporation process is also used to separate a solid from
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report 4 acid base - Ricke, Matthew UNIVERSITY OF KANSAS -...

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