\(\text{Fe+H2SO4=FeSO4+H2}\)
Ta có :
\(\text{nH2=1,792/22,4=0,08mol}\)
\(\text{=>nFe=0,08mol}\)
Khi cho 0,08mol Fe td với HNO3:
Quá trình nhường e: Fe=Fe+3 +3e
=> n e nhường=0,24mol
Theo ĐLBTe, ta có n e cho=n e nhận.
Quá trình nhận e: \(\text{N+5 +3e=>N+2}\)
\(\text{=> nN+2=0,24/3=0,08mol}\)
\(\text{=>nNO=0,08mol =>V NO=0,08.22,4=1,792l}\)
Fe+H2SO4--->FeSO4+H2
Fe+4HNO3---->Fe(NO3)3+NO+2H2O
n H2=0,08(mol)
Theo pthh1
n Fe =n H2 =0,08(mol)
m Fe=0,08.56=4,48(g)=m
Theo pthh2
n NO=n Fe=0,08(mol)
V NO= V=0,08.22,4=1,792(l)
PTHH:Fe+H2SO4->FeSO4+H2
mol:....1......1..............1..........1
mol:...0,08.....0,08.....0,08......0,08
nH2=1,792:22,4=0,08(mol)
m=0,08.56=4,48(g)
PTHH:Fe+4HNO3->2H2O+NO+Fe(NO3)3
mol:1...........4.............2........1..........1
mol:0,08......0,32......0,16.....0,08.....0,08
V\(_{NO}\)=0,08.22,4=1,792(l)