4FeS2+11O2\(\rightarrow\)2Fe2O3+8SO2
2SO2+O2\(\rightarrow\)2SO3
SO3+H2O\(\rightarrow\)H2SO4
\(m_{FeS_2}=120.\dfrac{80}{100}=96gam\)
\(n_{FeS_2}=\dfrac{96}{120}=0,8mol\)
Theo PTHH ta có: \(n_{H_2SO_4}=2n_{FeS_2}=1,6mol\)
\(m_{ddH_2SO_4}=\dfrac{1,6.98.100}{98}=160g\)