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3K₂O + 2H₃Po₄ => 2K₃Po₄ + 3 H₂O
Metal(aktywny) + Kwas => sól + wodór
2Na + H₂SO₄ => Na₂SO₄ + H₂
H₂SO₃ + K₂O --> K₂SO₃ + H₂O
metal + niemetal --> sól
Cu + S --> CuS
metal + kwas --> sól + wodór
2Mg + 2H₂SO₃ --> Mg₂(SO₃)₂ + 2H₂
proszę;)
pozdrawiam:)