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Ag+ + J- ----> AgJ (strzałka w dół)
CaCl2 + Na2CO3 ----> CaCo3 + 2NaCl
Ca 2+ + CO3 2- ----> CaCO3(strzałka w dół)
3Na2SO4 + 2Pb(No3)3 ----> 6NaNO3 + Pb2(SO4)3
3SO4 2- + 2Pb 3+ ----> Pb2(SO4)3 (strzałka w dół)
FeCl3 + 3NaOH ---> Fe(OH)3 + 3NaCl
Fe 3+ + 3OH- ---> Fe(OH)3 (strzałka w dół)