Question

Un acid anorganic A contine in procente de masa : 1%H; 35%Cl; 64%O.Acest acid reactioneaza cu acidul sulfuros si produce acid clorhidric si acid sulfuric.Se cere compozitia in procente de masa a amestecului de acizi rezultati, daca in reactie intra 0,1 moli acid A.Cu cati moli de hidroxid de sodiu se neutralizeaza amestecul de acizi?

Answer 1

H: 1/1=1
Cl: 35/35,5≈1
O: 64/16=4
f.m: HClO4 - acidul percloric (un acid foarte tare)
HClO4 + 4H2SO3 -> HCl + 4H2SO4
1mol..........................35,5g...4*98g
0,1moli......................3,55g...39,2g
mamestec=42,75g
%HCl=3,55*100/42,75=8,305
%H2SO4=91,695
HCl + NaOH -> NaCl + H2O
35,5g.............1mol
3,55g.........0,1moli
H2SO4 + 2NaOH -> Na2SO4 + 2H2O
98g.............2moli
39,2g.......0,8moli
TNaOH=0,9moli