In laboratory preparation of chlorine, manganese dioxide (MnO2) reacts 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?

In laboratory preparation of chlorine, manganese dioxide (MnO2) reacts

1.	In laboratory preparation of chlorine, manganese dioxide (MnO2) reacts 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= (Atomic mass of Mn + 2 x atomic mass of oxygen) = 55 + 32 g = 87 g 87g of MnO₂ react with 4 moles of HCl i.e. 4 x 36.5 g = 146 g of HCl. (Molar mass of HCl is 36.5) 5.0 g of MnO₂ will react with HCl = 146/87 x 5.0 g =8.40 g.