The Total solution for NCERT class 6-12
Chlorine is prepared in the laboratory bytreating manganese dioxide (MnO2) with aqueous hydrochloric acidaccording to the reaction
4HCl(aq) +MnO2(s) → 2H2O(l) +MnCl2(aq) + Cl2(g)
How many grams of HCl react with 5.0 g of manganesedioxide?
1 mol [55 + 2 × 16 = 87 g] MnO2 reactscompletely with 4 mol [4 × 36.5 = 146 g] of HCl.
5.0 g of MnO2 will reactwith
of HCl
= 8.4 g of HCl
Hence, 8.4 g of HCl will react completely with 5.0 g ofmanganese dioxide.