theo đề bài:
a)n\(_{SO_2}\)=3,36/22,4=0,15mol
PTPU
\(Na_2SO_3+2HCl->2NaCl+SO_2+H_2O\)
0,15...............0,3.............0,3................0,15.....0,15(mol)
\(n_{Na_2SO_3}=0,15mol=>m_{Na_2SO_3}=0,15.126=18,9g\)
%m\(_{Na_2SO_3}=\)18,9.100/28=67,5%
%m\(_{NaCl}\)=100-67,5=32,5%
b)nHCl=0,3mol
\(C_{M_{HCl}}=\dfrac{0,3}{0,5}=0,6M\)
m\(_{NaCl_{ }}\)=0,3.58,5+(m\(_{hh}-m_{Na_2SO_3}\))
=17,55+9,1=26,65g