Page 31 - Practical-organic-3

8. Calculate the needed amounts to do the reaction (in gram for solid & ml for

liquid) of 0.04 mole of hydrazine hydrate and 0.04 mole of ethyl acetoacetate, then
calculate the theoretical yield.
(M.Wt. of hydrazine hydrate = 50 g & = 1.032 g/ml)

(M.Wt. of ethyl acetoacetate = 132.14 g & = 1.02 g/ml)
(M.Wt. of 3-methyl-pyrazolinone = 98.11 g)

Hydrazine hydrate Ethyl acetoacetate Theoretical yield
amount (ml) amount (ml)

……………………….… ………………………... ……………………….……….
…………………….…… ……………………….…. ..…………..……………….…
………………….……… .…………………….….. ….………………….…………

…………………………… …………………….……. …...…………………………
…………………………… ………………….……… ………………………………
…………………………… …….…………………… ………………………………

…………………………… ……...……….………… …..….…….…………………
………………….……… ……….…….…………… ………………………………
…………………………… ……..…….…………… ………………………………

…………………………… ……….….……………… ………………………………
………………………..… …………......................... ………………………………

9. In the previous example, if the weight of the pure dry powder 3-methyl-
pyrazolinone was 1.95 gram, calculate the %yield.
……………………………………………………………………………………………

……………………………………………………………………………………………
……………………………………………………………………………………………

…………………………………………………..……………………………………..…
…………………………………………………………………………………………...

31