Preparation of Aspirin (show all calculations with units and sig. figs.) write t

Question

Preparation of Aspirin (show all calculations with units and sig. figs.) write the equation for the formation of aspirin from salicylic acid and acetic anhydride. Show the structures of all reactants and products. Calculate the molecular masses for salicylic acid and aspirin. Show calculations. Salicylic acid: Aspirin: Data from the synthesis of aspirin. Record the mass of salicylic acid used and mass of aspirin obtained. Use the molecular masses to calculate the moles of each: Record the theoretical yield of aspirin in your reaction here: moles (must be same as starting material) Record the actual yield of aspirin in your reaction here:

Explanation / Answer

1) The reaction is given by

C7H6O3 (Salicylic acid) + C4H6O3 (Ethanoic anhydride) -------> C9H8O4 (Aspirin) + C2H4O2 (Acetic acid)

2) molecular mass of Salicylic acid = 12 * 7 + 6*1 + 3*16 = 84+ 6+ 48 = 138 g/mole

molecular mass of Aspirin = 12*9 + 8*1 + 16*4 = 108 + 8 + 64 = 180 g /mole

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