Chem Lab II midterm unit 7

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8 Terms

1

to hydrolyze the salt formed in the reaction of the Grignard reagent, you added

3M HCL soln

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2

difference between % recovery and % yield

physical change, chemical change

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3

difference between % crude yeild and % pure yeild

yield of rxn products before purification, yield of rxn products after purification

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4

if you wanted to was a water soluble by product from a reaction mixture, you would

extract with 10% sodium bicarbonate solution

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5

what was the purpose of dispensing the initial reagents with syringes

prevent moisture in reactants mixutre

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6

purpose of cold water on outside of reaction vessel, why is it needed?

to cool grignard reagent before addition, the addition is exothermic?

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7

if benzaldehyde was added too quickly

solvent would boil, mixture would sputter, product would be lost

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8

organic by product

biphenyl

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