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\(BaCl2+H2SO4-->BaSO4+2HCl\)
\(n_{BaSO4}=\frac{46,6}{233}=0,2\left(mol\right)\)
\(nH2SO4=n_{BaSO4}=0,2\left(mol\right)\)
\(m_{H2SO4}=0,2.98=19,6\left(g\right)\)
\(C\%_{H2SO4}=\frac{19,6}{200}.100\%=9,8\%\)
\(n_{HCl}=2n_{BaSO4}=0,4\left(mol\right)\)
\(HCl+NaOH-->NaCl+H2O\)
\(n_{NaOH}=1,8.0,5=0,9\left(mol\right)\)
\(n_{HCl}=n_{NaOH}=0,9\left(mol\right)\)
\(n_{HCl\left(X\right)}=0,9-0,4=0,5\left(mol\right)\)
\(m_{HCl\left(X\right)}=0,5.36,5=18,25\left(g\right)\)
\(C\%_{HCl}=\frac{18,25}{200}.100\%=9,125\%\)
\(n_{BaSO_4}=0,2\left(mol\right)\\ BTNT.S\Rightarrow n_{H_2SO_4}=n_{BaSO_4}=0,2\left(mol\right)\)
\(OH^-+H^+\rightarrow H_2O\)
0,8_____0,8
\(\Rightarrow n_{H^+}=2n_{H_2SO_4}+n_{HCl}\Rightarrow n_{HCl}=0,4\left(mol\right)\)
\(H_2SO_4+BaCl_2\rightarrow BaSO_4+2HCl\left(1\right)\)
\(HCl+NaOH\rightarrow NaCl+H_2O\left(2\right)\)
Ta có:
\(n_{H2SO4}=n_{BaSO4}=\frac{46,6}{233}=0,2\left(mol\right)\)
\(\Rightarrow n_{HCl\left(1\right)}=0,4\left(mol\right)\)
\(n_{HCl\left(2\right)}=0,5.1,6=0,8\left(mol\right)\)
\(\Rightarrow n_{HCl}=0,8-0,4=0,4\left(mol\right)\)
\(C\%_{HCl}=\frac{0,4.36,5}{200}.100\%=7,3\%\)
\(C\%_{H2SO4}=\frac{0,2.98}{200}.100\%=9,8\%\)
