scrie ecuatiile reactiilor cu ajutorul carora se pot realiza transformarile
Na->NaOH->NaCl
BaO->Ba(OH)2 ->BaSO4
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Răspuns:
a) 2Na + 2H2O → 2NaOH + H2
NaOH + HCl → NaCl + H2O
b) BaO + H2O → Ba(OH)2
Ba(OH)2 + H2SO4 → BaSO4 + 2H2O
Răspuns:
2Na + 2H2O → 2NaOH + H2↑
NaOH + HCl → NaCl + H2O
BaO + H2O → Ba(OH)2
Ba(OH)2 + H2SO4 → BaSO4 + 2H2O
Explicație: