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Completeaza si egaleaza ecuatiile reactiilor de obtinere a bazelor:
...+H₂O=NaOH
...+H₂O=Ca(OH)₂
CuSO₄+...=Cu(OH)₂+...
FeCl₃+...=Fe(OH)₃+...


Răspuns :

Na2O+H2O=2NaOH
CaO+H2O=Ca(OH)2
CuSO4+Mg(OH)2=Ca(OH)2+MgSO4
FeCl3+Al(OH)3=Fe(OH)3+AlCl3