.


:




:

































 

 

 

 





, tn, ()
Na2S2O3(-) 2
      1      
      2      
      3      

 

? :

 

 

 

? :

__________________________________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________


2.

( 2-3 ), .

, .

, . 3-4 . , . . , . , .

? , .

 

: :
___________________________________________ ______________________________________________ ____________________________________________ __________________ ___________________ ___________________

 

? . . 4.2.

4.2

 

tn, ()
       
     

 

? . .

__________________________________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________


3.

(III), , , .

.

1. 2-3 (III) 2-3 .

? , .

 

: :
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2. (III) . .

3. . (III), , . . , .

? . 4.3.

4.3





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