Limiting Reactants Post- Module

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Hannah Padilla 1H
Posts: 29
Joined: Fri Sep 28, 2018 12:19 am

Limiting Reactants Post- Module

Postby Hannah Padilla 1H » Mon Oct 01, 2018 4:19 pm

I was working on the limiting reactants post-module assessment and I got confused about this problem:
20. How many moles of CO2(g) are produced when 1 kg of CaCO3(s) is used to neutralize an acid spill? The equation for the reaction at 1 atm and 25 degrees C is:

CaCO3(s) + H2SO4(aq) ---> CaSO4(s) + CO2(g) + H2O(l)
What do we need the information about 25 degrees or the 1 ATM for?
Thank you!

Kelsey Warren 1I
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: Limiting Reactants Post- Module

Postby Kelsey Warren 1I » Mon Oct 01, 2018 4:27 pm

Hi Hannah,

I'm under the impression that the given pressure and temperature are not needed for calculating the amount of moles of carbon dioxide produced. I think that those come in handy when dealing with Ideal Gas Law problems, etc.

Hopefully it's true that we didn't need to use that information!

Posts: 29
Joined: Fri Sep 28, 2018 12:17 am

Re: Limiting Reactants Post- Module

Postby Michael_Navarro_1H » Mon Oct 01, 2018 5:52 pm

Typically, chemistry questions throw in extraneous information such as the temperature and pressure as a means to distract students from focusing on only the necessary information. In a question such as this, you should know that only the stoichiometric co-efficients as well as the mass of CaCO3 used are the only variables you should be concerned with.

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