Homework Help: chemistry-check over work

Posted by kelly on Friday, March 7, 2008 at 12:48pm.

2C6H5Cl(chlorobenzene)+C2HOCl3(chloral)=C14H9Cl5(DDT)+H2O
in a gov. lab 1142 g of chlorobenzene is reacted with 485 g of chloral.
a). what mass of DDT is formed? 1166.179 g of C14H9Cl5
b). which reactant is limiting?C2HOCl3 which reactant is in excess?C6H5Cl
c). what mass of the excess reactant is left over? 397.56g C6H5Cl
d). if the actual yield is 200.0 g, what is the percent yield? 50.30%

chemistry-check over work - DrBob222, Friday, March 7, 2008 at 2:59pm
a)I obtained 1166.5 which would round to 1166 g (but the 485 limits us to 3 sig figures).
b)right on both.
c)I obtained 740.77 g chlorobenzene used which gives 401.22 remaining. The difference may be in rounding. I left all the numbers in my calculator as I went from one step to the other. I think your number is close enough that you probably worked the problem correctly. Of course we would get slightly different numbers for percent yield; I used your numbers and 50.306%
which will round to 50.31 but we aren't allowed that many significant figures anyway. Good work.

Answer this Question

Related Questions

chemistry - 2C6H5CL + C2HOCL3 / C14H9CL5 + H2O 114G CHLOROBENZENE IS REACTED ...
Chemistry - DDT, an insecticide harmful to fish, birds, and humans, is produced ...
Chemistry - Consider the following reaction: C6H5CL+C2HOCL3=>C14H9CL5+H20...
chemistry - Consider the following reaction: C6H5CL+C2HOCL3=>C14H9CL5+H20...
Chloral Hydrate - What is the molar mass of chloral hydrate and how many moles ...
Ecology - Use an example to explain how an animal living hundreds of kilometers ...
CHEMISTRY- vapour pressure - Bromobenzene, C6H5Br, and chlorobenzene, C6H5Cl, ...
Environmental Science - Describe how DDT moves through an aquatic food chain. ...
chemistry - 5. DDT is an insecticide banned by the U.S Government because it is ...
Chemistry - What mass of chloral hydrate (C2H3Cl3O2) would contain 1.0 grams of ...

For Further Reading

First Name:
School Subject:
Answer: