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URGENT! HELP ASAP! Stoichiometry problem!
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Author Topic: URGENT! HELP ASAP! Stoichiometry problem!  (Read 469 times)
beanie
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« on: November 21, 2009, 10:10:06 AM »
Consider the following reaction: 
                  2 HNO3(aq) + Na2CO3(aq) >  H2O(l) + CO2(g) + 2NaNO3(aq)

A 0.025 L sample of HNO3 solution requires 0.0357 L of  0.108 M Na2CO3 to completely react with all of the HNO3 in the solution.  What is the concentration of the HNO3?


PLASE HELP ASAP!  Thank you. 
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kingchemist
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« Reply #1 on: November 21, 2009, 11:05:36 AM »
Find moles Na2CO3 by multiplying volume in litres x molarity = w moles

From the balanced equation, 1 mole of Na2CO3 reacts with 2 mole HNO3, so
                                         w mol   ..     ..          ..       ..  (2/1) x w moles of HNO3

So now you know the number of moles of HNO3 and the volume. You can find molarity
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