August 2022 1 4 Report

 

 K₂Cr₂O₇ +                  + H₂SO₄ =  I₂ + Cr₂ (SO₄)₃ +         +H₂O

 

 

 задание из ЕГЭ

 

  нужно вставить в пропуск и расписать по электронному балансу (  I₂ -  это йод )

 

 

 

 

 

 

 

 

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