Homework Help: chemistry(check my work)

Posted by eng on Friday, April 2, 2010 at 11:50pm.

When a reaction mixture with a total volume of 1720 mL that contains 0.605 L of gaseous CO2 measured at STP dissolved in 940 mL of water was stoichiometrically produced as per the balanced equation, how many mol of solid CaCO3 were required?

H2SO4(aq) + CaCO3(s) → CO2(g) + CaSO4(s) + H2O(l)
.605L/22.4L=moles CO2
mol CaCO3=molCO2

chemistry(check my work) - DrBob222, Saturday, April 3, 2010 at 12:02am
I'm not quite sure how to interpret the problem. If it is 0.605 L CO2 (and you are taking the entire amount of CO2) then your set up is correct. However, if you have CO2 dissolved in 940 mL and you are taking 605 mL of that solution, .....I don't know. Perhaps that scenario doesn't make sense.
chemistry(check my work) - eng, Saturday, April 3, 2010 at 12:25am
how would you do it differently then
chemistry(check my work) - DrBob222, Saturday, April 3, 2010 at 12:31am
I don't know that I can offer another solution. It may be that all of those different mL and L are thre just to confuse you. And they succeeded for me. The method you have is ok, I think, if they interpret it the same way we did.

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