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pH < 7
odczyn kwasowy
2.
Zapis cząsteczkowy:Ca(OH)₂ + 2HCl = CaCl₂ + 2H₂O
Zapis jonowy:Ca²⁺+ 2OH⁻+ 2H⁺+ 2Cl⁻=Ca²⁺+ 2Cl⁻ + 2H₂O
3.
HCOOC₂H₅ + H₂O=HCOOH + C₂H₅OH