DDT, an insecticide harmful to fish, birds, and humans, is produced by the follo

ID: 896502 • Letter: D

Question

DDT, an insecticide harmful to fish, birds, and humans, is produced by the following reaction:

2C6H5Cl+C2HOCl3----->C14H9Cl5+H2O

In a government lab, 1154 g of chlorobenzene is reacted with 476 g of chloral.

What mass of DDT is formed, assuming 100% yield? Mass=________g

Which reactant is limiting? Which is in excess?

________is limiting

_________ is an excess

What mass of the excess reactant is left over?

mass= ________g excess

If the actual yield of DDT is 200.0 g, what is the percent yield?

percent yeild=_________%

2C6H5Cl + C2HOCl3---------------------------------->C14H9Cl5+H2O

225.18 g 147.39g 354.48 g

1154g 476g ???

for 476 g Chloral --------------> 225.18 x 476 / 147.39 = 727.22 g chlorobenzene is needed . but we have excess chloro benzene .

so limiting reagent is chloral .product based on limiting reagent

147.39 g chloral ---------------------> 354.48 g DDT

476 g chloral -----------------------> x g DDT

x = 354 .48 x 476 / 147.39

x = 1144.8 g

(a) mass of DDT formed = 1144.8 g

(b) limiting reagent is chloral

excess is chlorobenzene

= 1154 -727.22

= 426.78 g of chlorobenzene

excess = 426.78 g of chlorobenzene

(d)

percent yield = (actual / theorical ) x 100

= (200 /1144.8 ) x 100

= 1.75%

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