Ca(NO₃)₂+K₂CO₃⇒CaCO₃+2KNO₃Ca⁻²+2NO₃⁻+2K⁺+CO₃⇒CaCO₃+2K⁺+2NO₃Ca+CO₃⇒СaCO₃========================Ba(OH)₂+2HNO₃⇒Ba(NO₃)₂+2H₂OBa+2OH+2H+2NO₃⇒Ba+2NO₃+2H₂O2OH+2H⇒H₂O========================FeCl₃+3NaOH⇒Fe(OH)₃+3NaClFe+3Cl+3Na+3OH⇒Fe(OH)₃+3Na+3ClFe+3OH⇒Fe(OH)₃========================KCl+AgNO₃⇔KNO₃+AgClK+Cl+Ag+NO₃⇒K+NO₃+Ag+Cl========================CuSO₄+Na₂S⇒CuS+Na₂SO₄Cu+SO₄+2Na+S⇒CuS+2Na+SO₄Cu+S⇒CuS========================Na₂CO₃+2HCl⇒2NaCl+CO₂+H₂O2Na+CO₃+2H+2Cl⇒2Na+2Cl+CO₂+H₂OCO₃+2H⇒CO₂+H₂O========================NH₄+OH⇒NH₃+H₂ONH₄Cl+NaOH⇒NaCl+NH₃+H₂O------------------------------------------Ca+CO₃⇒CaCO₃CaCl₂+K₂CO₃⇒CaCO₃+2KCl------------------------------------------Pb+S⇒PbSPb(NO₃)₂+Na₂S⇒PbS+2NaNO₃