Răspuns :
FeO +2 HCl----> FeCl2 + H2O
(1)
Fe2O3 +6 HCl---> 2FeCl3+ 3 H2O (2)
amestecul este echimolecular deci va contine cate x moli din fiecare oxid
MFeO=72g/mol
MFe2O3=160g/mol
masa amestecului de oxizi este: 72x + 160x= 46,4 ==> x=0,2 moli
mFeO= 0,2moli*72g/mol=14,4g
mFe2O3=0,2moli*160g/mol=32g
72gFeO........56gFe 160gFe2O3...........112gFe
100g................x1=......% 32gFe2O3............x2=......%
46,4g amestec......14,4g Feo..............32gFe2O3
100g amestec............z............................w ==> z=...% ; w=.....%
din ecuatia (1) ====> 72gFeO..........2*36,5gHCl
14,4g FeO........x=14,6 g HCl
din ec (2) ==> 160g Fe2O3............6*36,5g HCl
32g Fe2O3...............y=43,8 g HCl
masa de HCl consumata in cele doua reactii este:
mdHCl=14,6g + 43,8g=58,4g
c=md*100/ms ==> ms=58,4*100/21,9=266,66g sol . HCl
(1)
Fe2O3 +6 HCl---> 2FeCl3+ 3 H2O (2)
amestecul este echimolecular deci va contine cate x moli din fiecare oxid
MFeO=72g/mol
MFe2O3=160g/mol
masa amestecului de oxizi este: 72x + 160x= 46,4 ==> x=0,2 moli
mFeO= 0,2moli*72g/mol=14,4g
mFe2O3=0,2moli*160g/mol=32g
72gFeO........56gFe 160gFe2O3...........112gFe
100g................x1=......% 32gFe2O3............x2=......%
46,4g amestec......14,4g Feo..............32gFe2O3
100g amestec............z............................w ==> z=...% ; w=.....%
din ecuatia (1) ====> 72gFeO..........2*36,5gHCl
14,4g FeO........x=14,6 g HCl
din ec (2) ==> 160g Fe2O3............6*36,5g HCl
32g Fe2O3...............y=43,8 g HCl
masa de HCl consumata in cele doua reactii este:
mdHCl=14,6g + 43,8g=58,4g
c=md*100/ms ==> ms=58,4*100/21,9=266,66g sol . HCl