Gọi \(\left\{{}\begin{matrix}n_{NaClO}=a\left(mol\right)\\n_{CaOCl2}=b\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow74,5a+127b=25\left(1\right)\)
PTHH :
\(NaClO+2HCl\rightarrow NaCl+Cl_2+H_2O\)
a_________________________a _______
\(CaOCl_2+2HCl\rightarrow CaCl_2+Cl_2+H_2O\)
b _________________________ b__________
\(\Rightarrow n_{Cl2}=a+b=\frac{5,6}{22,4}=0,25\left(2\right)\)
\(\left(1\right)+\left(2\right)\Rightarrow\left\{{}\begin{matrix}a=\frac{9}{70}\\b=\frac{17}{140}\end{matrix}\right.\)
\(\Rightarrow m=m_{NaCl}+m_{CaCl2}=58,5.\frac{9}{70}+111.\frac{17}{140}=21\left(g\right)\)