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a) CaO + H₂O ------> Ca(OH)₂
b) FeO + H₂O ------> Fe(OH)₂
c) 2 K + 2 H₂O --------> 2 KOH + H₂
d) Al₂O₃ + 3 H₂O ------> 2 Al(OH)₃
Zad 2
1) Ca(OH)₂ ------> Ca²⁺ + 2 OH⁻
2) KOH ------> K⁺ + OH⁻
3) Fe(OH)₂ -------> Fe²⁺ + 2 OH⁻