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2Na+ + CO₃²- + Ba ²+ + 2OH- ----> 2Na+ + 2OH - + BaCO₃
Ba²+ + CO₃²- ----> BaCO₃
b) Ca(OH)₂+ Na₂SO₃----> CaSO₃(strzałka w dół) + 2NaOH
Ca²+ + 2OH - + 2Na+ + SO₃²- ----> CaSO₃ + 2Na+ + 2OH -
Ca²+ + SO₃²- ---> CaSO₃
c) 3Sr(OH)₂+ 2K₃PO₄----> Sr₃(PO₄)₂+ 6KOH
3Sr²+ + 6OH- + 6K+ + 2PO₄³- ----> Sr₃(PO₄)₂ + 6K+ + 6OH-
3Sr+ + 2PO₄³- ----> Sr₃(PO₄)₂