product (which must be removed Some MgBr PROCEDURE dried Clean the following ite
ID: 496427 • Letter: P
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product (which must be removed Some MgBr PROCEDURE dried Clean the following items, place them It essential that glassware used be clean and scrupulously experiment two 5-mL period before this caps or intoa beaker and give them to your rod (REMOVE all plastic oven reaction vials, 50-mL flask, Claisen head, drying tube, and a glass 120°C drying our laboratory staff will be responsible for drying your glassware in the when previously dried 25-mL round-bottom flasks, spin bars, and Pasteur pipets will be available you do the experiment. Go to the drying oven, and obtain all the necessary materials (CAREFUL They will be at 120 C, which is As soon as the glassware is cool enough to handle, charge the drying tube with anhydrous calcium chloride (held in place by cotton plugs), and then assemble remainder of the apparatus as pictured, the pellets except for the (see Figure l). obtain 0.15gof magnesium turnings, and place them (along with bar into the round-bottom flask. Place the rubber septum over the open port of the Claisen head. Figure 1 Grignard setup RAT MountExplanation / Answer
Yield = moles product / moles of reactant x 100
moles of reactant = moles of limited ragent. ( reactant that is in lowest mole)
reactant in g to moles :
mass of the reactant / molecular mass = moles
reactant in ml to moles :
density = mass / volume
mass = volume x density
mass / molecular mass = moles
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