Na-->nacl-->nahso4-->na2so4-->nacl

Question

Na-->nacl-->nahso4-->na2so4-->nacl

Answer 1

CL+NaOH+HCL=NaCL+H20

NaCL+H2SO4=NaHSO4+HCl
NaCL+NaHSO4=Na2SO4
Na2SO4+HCL=NaCl+H2SO4