Question

Scrieti ecuatiile reactiilor chimice (EM,EIC,EIR)
1)NaOH si H2SO4
2)Na2SO4 si BaCl2
3)Na2CO3 si HCl
4)Na2SO4 si HCl



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Answer 1

Răspuns:

a)(EM) 2NaOH+ H2SO4=2H2O +Na2so4

(EIC)2Na++OH-+2H++SO42-=2H2O+2Na++SO42-

(EIR)OH-+2H+=2H2O

b)(EM) BaCl2+Na2so4=BaSo4+ 2NaCl

(EIC) Ba2++2Cl-+ 2Na++So42-= BaSo4+2Na++2Cl-

(EIR) Ba 2+SO42-=BaSo4

C)(EM) 2HCl+ Na2co3= Co2+H20+2NaCl

(EIC) 2H++2Cl-+2Na++CO32-=Co2+H2o+2Na++2Cl-

(EIR)2H++CO32-=CO2+H20

D)(EM) Na2So4 +2HCl= 2NaCl+H2SO4

(EIC) 2Na++So42-+2H++2Cl-=2Na++2Cl-+2H++So42-

(EIR) —