pthh: \(CaCO_3+2HNO_3\rightarrow Ca\left(NO_3\right)_2+H_2O+CO_2\)
bđ___0,15______0,2
pư___0,1_______0,2_______0,1
kt___0,05_______0________0,1
\(V_{CO_2}=2,24l\)
\(n_{CaCO_3}=5g\)
\(C\%ddCa\left(NO_3\right)_2=\dfrac{16,4}{136,6}.100\%\approx12\%\)