a, \(MgCO_3+2HCl\rightarrow MgCl_2+H_2O+CO_2\uparrow\)
\(2Al+6HCl\rightarrow2AlCl_3+2H_2\uparrow\)
\(n_{Khi}=\frac{1,288}{22,4}=0,0575\left(mol\right)\)
\(n_{HCl}=2n_{Khi}=0,115\left(mol\right)\)
\(\rightarrow V_{HCL}=\frac{0,115}{0,46}=0,25\left(l\right)\)