\(Na_2CO_3+2HCl\rightarrow2NaCl+H_2O+CO_2\)
\(K_2CO_3+2HCl\rightarrow2KCl+H_2O+CO_2\)
\(BaCO_3+2HCl\rightarrow BaCl_2+H_2O+CO_2\)
\(ZnCO_3+2HCl\rightarrow ZnCl_2+H_2O+CO_2\)
\(n_{CO_2}=\dfrac{V_{\left(\text{Đ}ktc\right)}}{22,4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
Từ các phương trình, ta tính được:
\(n_{HCl}=2n_{CO_2}=2.0,3=0,6\left(mol\right)\)
\(n_{H_2O}=n_{CO_2}=0,3\left(mol\right)\)
BTKL: \(m_{hh}+m_{HCl}=m_{mu\text{ố}i}+m_{H_2O}+m_{CO_2}\)
\(\Leftrightarrow43,45+0,6.36,5=m_{mu\text{ố}i}+0,3.18+0,3.44\)
\(\Leftrightarrow m_{mu\text{ố}i}=46,75\left(g\right)\)