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Alege ecuatiile reactiilor de schimb in urma carora se obtin baze.Completeaza si egaleaza aceste ecuatii:
a)Na + H₂O --->?+H₂
b)Na₂SO₄ +Ba(OH)₂---> ?+?
c)CuCl₂ + Ca(OH)₂--->? + ?
d)BaO + H₂O--->?


Răspuns :

a) 2Na+2H₂O=2NaOH+H₂
b) Na₂SO₄+Ba(OH)₂=BaSO₄+2NaOH
c) CuCl₂+Ca(OH)₂=Cu(OH)₂+CaCl₂
d) BaO+H₂O=Ba(OH)₂