\({n_{KMn{O_4}}} = \dfrac{{15,8}}{{158}} = 0,1\left( {mol} \right)\)
\(2KMn{O_4} + 16HCl\xrightarrow{{}}2MnC{l_2} + 2KCl + 5C{l_2} + 8{H_2}O\)
Theo PTHH: \({n_{C{l_2}}} = \dfrac{5}{2}{n_{KMn{O_4}}} = \dfrac{5}{2}.0,1 = 0,25\left( {mol} \right)\)
\( \Rightarrow {V_{C{l_2}}} = 0,25.22,4 = 5,6\left( l \right)\)
=> Chọn C