July 2022 1 4 Report



В схеме превращений
H2SO4 - K2SO4 - CaSO4
веществами X1 и X2 являются
соответственно







  


 1) 


KOH 
и  CaCO3




  


 2) 


KCl 
и  Ca3(PO4)2




  


 3) 


KCl 
и  CaO




  


 4) 


KOH 
и  CaCl2






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