2 FES2 + 14 H2SO4  FE2(SO4)3 + 15 SO2 + 14 H2O (1) 2 FES + 10 H2SO...

1. - DE DAP AN HSG HOA 12 MTCT TINH THAI NGUYEN 2012 1. - DE DAP AN HSG HOA 12 MTCT TINH THAI NGUYEN 2012
Lớp 12 DE DAP AN HSG HOA 12 MTCT TINH THAI NGUYEN 2012

1.

2 FeS

2

+ 14 H

2

SO

4

 Fe

2

(SO

4

)

3

+ 15 SO

2

+ 14 H

2

O (1)

2 FeS + 10 H

2

SO

4

 Fe

2

(SO

4

)

3

+ 9 SO

2

+ 10 H

2

O (2)

5 SO

2

+ 2 KMnO

4

+ H

2

O  2KHSO

4

+ 2 MnSO

2

+ H

2

SO

4

(3)

VIn

FeS

(10,0)

2

= 0,002 (mol) tửứ (1) vaứ (2)

n

FeS

= 0,003 (mol)

n

SO

2

=152 n

FeS

2

+92n

FeS

= 0,0285 (mol)

Tửứ (3)

n

KHSO

4

=25n

SO

2

= 0,0114 (mol)

n

H

2

SO

4

=15n

SO

2

= 0,0057 (mol)

H

+¿

(ddD)=n

KHSO

4

+2n

H

2

SO

4

n

¿

= 0,0228 (mol)

V

ddD

=

100,

−2

0228

= 2,28 (lớt)