Chlorine is prepared in the laboratory by treating manganese dioxide (

1.	Chlorine is prepared in the laboratory by treating manganese dioxide (MnO2) with aqueous hydrochloric acid according to the reaction 4HCl (aq) + MnO2(s) → 2H2O(l) + MnCl2(aq) + Cl2(g) How many grams of HCl react with 5.0 g of manganese dioxide?
Answer» 1 mol of MnO₂ = 55+32 g = 87 g 87 g of MnO₂ react with 4 moles of HCl i.e. 4×36.5 g = 146 g of HCl. ∴ 5.0 g of MnO₂will react with HCl = 146/87×5.0 g = 8.40 g.

Chlorine is prepared in the laboratory by treating manganese dioxide (MnO2) with aqueous hydrochloric acid according to the reaction 4HCl (aq) + MnO2(s) → 2H2O(l) + MnCl2(aq) + Cl2(g) How many grams of HCl react with 5.0 g of manganese dioxide?

Answer»

1 mol of MnO₂ = 55+32 g = 87 g

87 g of MnO₂ react with 4 moles of HCl i.e. 4×36.5 g = 146 g of HCl.

∴ 5.0 g of MnO₂will react with HCl = 146/87×5.0 g = 8.40 g.