What volume of carbon dioxide would evolve if....?

What volume of carbon dioxide would evolve if a #25*g# mass of zinc carbonate is treated with a #0.300*dm^3# volume of #2*mol*dm^-3# nitric acid?

1 Answer
Apr 15, 2017

Answer:

We interrogate the following reaction:

#ZnCO_3(s) + 2HNO_3(aq) rarr Zn(NO_3)_2(aq) + H_2O(l) + CO_2(g)uarr#

Explanation:

#"Moles of zinc carbonate"# #=# #(25.0*g)/(125.42*g*mol^-1)=0.199*mol.#

#"Moles of nitric acid"# #=# #0.300*dm^3xx2*mol*dm^-3=0.60*mol.#

clearly there is excess acid, and the reaction is stoichiometric in zinc carbonate. We should get #0.199*mol# of #CO_2(g)# evolved. Under standard conditions (and you should check which standard conditions pertain - they vary across each syllabus), the molar volume is #22.7*L*mol^-1#. And thus.........

#22.7*L*mol^-1xx0.60*mol=13-14*L#.