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Topic: Solution stoichiometry... mass in grams?  (Read 5145 times)

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Offline FLgirl

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Solution stoichiometry... mass in grams?
« on: October 16, 2012, 06:47:36 PM »
"What volume (in mL) of a 0.150 M HNO3 solution will completely react with 35.7 mL of a 0.108 M Na2CO3 solution according to the following balanced equation:

Na2CO3 + 2 HNO3 ---> 2 NaNO3 + CO2 + H2O

In the reaction above, what mass (in grams) of carbon dioxide forms?"

The first part I solved, but how do I calculate the mass(g) of carbon dioxide?

Offline BetaAmyloid

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Re: Solution stoichiometry... mass in grams?
« Reply #1 on: October 16, 2012, 07:03:41 PM »
If you know the volume of HNO3 that completely reacts with Na2CO3, then you know that both react completely and there really is "no" limiting reactant. That being so, you can take either the volume of HNO3 or Na2CO3, and given there molarities:

1) calculate the moles of either HNO3 or Na2CO3
2) use a molar ratio between either HNO3 or Na2CO3 and CO2
3) multiply by the molar mass of CO2 to get to grams of CO2

Note: Make sure your units are correct, is molarity mol/mL or mol/L? Are your volumes in mL or L? Make sure the units match up.
Discovery consists of seeing what everybody has seen and thinking what nobody has thought - Albert Szent-Györgyi

Offline FLgirl

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Re: Solution stoichiometry... mass in grams?
« Reply #2 on: October 16, 2012, 07:30:17 PM »
Thank you so very much.

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