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Na(+) + OH(-) + H(+) + Cl(-) ->Na(+) + Cl(-) + H2O
OH(-) + H(+)->H2O
Fe(OH)₂+ 2HCl->FeCl2+2H2O
Fe(2+) + 2OH(-) + 2H(+) + 2Cl(-) ->Fe(2+) + 2Cl(-) + 2H2O
2OH(-) + 2H(+) ->2H2O
OH(-) + H(+)->H2O
2NaOH + H₂CO₃ --> Na2CO3+2H2O
2Na(+) + 2OH(-) + 2H(+) + CO3(2-) ->2Na(+) + CO3(2-) + 2H2O
2OH(-) + 2H(+) ->2H2O
OH(-) + H(+)->H2O
tak na marginesie to Fe(OH)₂jest nierozpuszczalne