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Baza alcalina+acid( +oxid acid)+(undele saruri)+(unele nematale)


Răspuns :

2NaOH+H2SO4=Na2SO4+H2O
2NaOH+SO2=Na2SO3+H2O
2NaOH+ZnCl2=Zn(OH)2+2NaCl
2NaOH+2Cl=NaCl+NaClO+H2O