2. :
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l Ѳ Ѳ
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2. : ) 2--2--2- ) - 2 -2 -2 -2 -
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3. , , ? .
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4. , , . , __________________
5. ?
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10
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4.1 .
dz 2 . . ?________________________________________ . i ?_____________________________
 ______________ : + NaOH... +...
4.2 .
npo6ipy . , ?
 + Zn... +...
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4.3 .
 1-2 2 - . , ' . . г :
  + 49... +...
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4.4 .
2-3 . :
 17 35 COONa + 1... +...
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4.5 ij .
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 2-3 (l2). ? : 17 35 COSO3 ONa + 12... +...
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4.6 .
2-3 , 2 , . ?_______________________________ ?______
6. ._______________________________________________________________
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6. :
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5. ?
6. :
 1) 3 2 + Mg...+...
 2) 94 - + NaOH... +...
 3) 17 35 + NaOH.... +...
7. :
 37
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3 37
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  2) __________________________________________________
3 3 3
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