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1. metal + kwas -> sol + wodor
2. kwas +zasada -> sól +woda
3. tlenek metalu + kwas-> sól + woda
CaS
1. Ca + H₂S -> CaS + H₂
2. H₂S + CAOH -> CaS + H₂O
3. CaO + H₂S -> CaS + H₂O
K₃PO₄
1. 6K + 2H₃PO₄ -> 2K₃PO₄ + H₂
2. H₃PO₄ + KOH -> K₃PO₄ + H₂O
3. K₂O + H₃PO₄ -> K₃PO₄ + H₂O
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