what is the reaction of red lead with conc.hcl...????

rn

why is conc.sulphuric acid used to prepare hcl in the lab...???

rn

 

(a). Pb3O4 + 8 HCl → 3 PbCl2 + Cl2 + 4 H2O

(b). HCl gas produced in the round bottom flask is moist ( as air containing water vapour is also present in the round bottom flask) and conc. sulphuric acid is used to dry and oxidize any other vapour that might be present along with HCl gas. 

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