Đặt \(\left\{{}\begin{matrix}n_{Na_2CO_3}=x\\n_{CaCO_3}=y\end{matrix}\right.\) ( mol )
\(\Rightarrow m_{hh}=106x+100y=30,6\left(g\right)\) \(\left(1\right)\)
\(n_{CO_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
\(Na_2CO_3+H_2SO_4\rightarrow Na_2SO_4+CO_2\uparrow+H_2O\)
x x x ( mol )
\(CaCO_3+H_2SO_4\rightarrow CaSO_4+CO_2\uparrow+H_2O\)
y y y ( mol )
\(n_{CO_2}=x+y=0,3\left(mol\right)\) \(\left(2\right)\)
\(\left(1\right);\left(2\right)\Rightarrow\left\{{}\begin{matrix}x=0,1\\y=0,2\end{matrix}\right.\)
\(\left\{{}\begin{matrix}\%m_{Na_2CO_3}=\dfrac{0,1.106}{30,6}.100=34,64\%\\\%m_{CaCO_3}=100\%-34,64\%=65,36\%\end{matrix}\right.\)
\(C\%_{H_2SO_4}=\dfrac{0,3.98}{225}.100=13,06\%\)
