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posted by  Nec on 7/22/2008 7:19:58 PM  |  status: Closed  

Calculate the percent...

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General Chemistry N/A N/A N/A
Question Details:
Calculate the percent C2O42- in each of the following:  H2C2O4, Na2C2O4, K2C2O4, and K3[Al(C2O4)3]*dot*3H2O.
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posted by CHEMNATION! on 7/22/2008 7:28:54 PM  |  status: Live
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Nec's comment:
"Thank you!"
Response Details:
I will do one for you:
 
H2C2O4
assume 1 mole, you have 2x1.00794 + 2x12.011 + 4x15.9994 g
 
The mass of 1 mole of oxalate ion is 2x12.011 + 4x15.9994 g
 
The percent oxalate is
((2x12.011 + 4x15.9994 g) / (2x1.00794 + 2x12.011 + 4x15.9994 g)) x 100% =
88/90 x 100% = 98 %
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