\(BaCl2+H2SO4-->BaSO4+2HCl\)
\(n_{BaSO4}=\frac{46,6}{233}=0,2\left(mol\right)\)
\(nH2SO4=n_{BaSO4}=0,2\left(mol\right)\)
\(m_{H2SO4}=0,2.98=19,6\left(g\right)\)
\(C\%_{H2SO4}=\frac{19,6}{200}.100\%=9,8\%\)
\(n_{HCl}=2n_{BaSO4}=0,4\left(mol\right)\)
\(HCl+NaOH-->NaCl+H2O\)
\(n_{NaOH}=1,8.0,5=0,9\left(mol\right)\)
\(n_{HCl}=n_{NaOH}=0,9\left(mol\right)\)
\(n_{HCl\left(X\right)}=0,9-0,4=0,5\left(mol\right)\)
\(m_{HCl\left(X\right)}=0,5.36,5=18,25\left(g\right)\)
\(C\%_{HCl}=\frac{18,25}{200}.100\%=9,125\%\)