1. The diene and the dienophile react in a 1:1 ratio in this experiment. However, in the procedure, you add one of the reagents in excess. Which one is in excess and why is this necessary? 2. The product of your experiment is an anhydride, which is easily hydrolyzed by water. Draw the structure of the hydrolyzed product. 3. Predict the NMR of the intended product of your Diels-Alder reaction. 4. State the differences you would see in both the IR and the NMR of the anhydride product compared to the hydrolyzed product.

h

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

the correct answer is:

a. formation of precipitation

it is b that is the answer.