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extraction - E XPE RI M E N T E XTRACTION 1 pt 1/2 pt 1 pt...

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E XPERIM ENT : E X TRA C TION Name _______________________________________ Instructor ____________________________________ Chem ____________ Section/Color _____________ _ Date ________________________________________ Laboratory Questions Page 1 These questions are to be completed and turned in at the beginning of the pre-lab period. PRE-L AB QUESTIONS Before any laboratory period, you should be able to write the structures of the organic chemicals you are going to be using and reactions that will be occurring. 1. Write the following reactions showing structures for starting materials and products: a) Benzoic acid + sodium hydroxide solution b) Benzocaine + hydrochloric acid solution 2. Define density as applied to organic molecules. a) Find and record the molecular weights and density of the following compounds: Dichloromethane: Hexane: Water: b) Is density directly related to the molecular weight of a substance? (That is, does density always increase when molecular weight increases?) Use the examples above to explain. 3. Which substance would be in top layer when each of the following pairs of solvents are added to the same container?
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