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Topic: Ap CHem Hep #2  (Read 17486 times)

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Offline Padfoot

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Re: Ap CHem Hep #2
« Reply #15 on: November 25, 2007, 07:06:46 PM »
alright so i have all part a done right. How do i do part b
Use definition of Percent yield.
http://www.chem.purdue.edu/gchelp/gloss/percentyield.html

Offline LQ43

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Re: Ap CHem Hep #2
« Reply #16 on: November 25, 2007, 07:15:35 PM »
B. What would be the percent yield of lead II sulfate if 15.2 G are recovered?

pls check that this is the value of PbSO4 recovered, compare with the theoretical yield that you just calculated, follow Padfoot's link for calculation help

Offline importfan878

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Re: Ap CHem Hep #2
« Reply #17 on: November 25, 2007, 07:40:49 PM »
link didnt work but if its the same as theoretical yield i got 217.609 g. And yeah im in honers chem who r u

Offline Padfoot

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Re: Ap CHem Hep #2
« Reply #18 on: November 25, 2007, 07:50:40 PM »
link didnt work but if its the same as theoretical yield i got 217.609 g.
Percent yield is the actual yield/thoeretical yield * 100

Also:
pls check that this is the value of PbSO4 recovered
I havn't read the whole question, but it seems wrong

And yeah im in honers chem who r u
Padfoot, not wcfl  ;)



Offline importfan878

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Re: Ap CHem Hep #2
« Reply #19 on: November 25, 2007, 08:42:17 PM »
uhh what? and yeha that wrong its 9.31g

Offline Padfoot

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Re: Ap CHem Hep #2
« Reply #20 on: November 25, 2007, 08:59:10 PM »
No.
« Last Edit: May 04, 2008, 07:57:33 PM by Brett »

Offline wcfl

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Re: Ap CHem Hep #2
« Reply #21 on: November 25, 2007, 09:33:45 PM »
do two  seperate 3 step equations then take your calculated results and divide by 15.2 then multiply by 100.  do this for both calculated results

Offline Padfoot

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Re: Ap CHem Hep #2
« Reply #22 on: November 25, 2007, 11:00:39 PM »
Quote
divide by 15.2 then multiply by 100. 
15.2 is the ACTUAL yield, not the theoretical yield.  So you've got in slightly around the wrong way here.
I doubt 15.2g is right in any case as the actual yield should'nt be greater that theoretical yield (from the posts above, the theoretical yield is 9.32g).

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