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Cząsteczkowa
Na2SO4 + Ba(NO3)2 -> 2 NaNO3 + BaSO4(osad)
Jonowa:
2Na+ + SO4-2 + Ba+2 + 2 NO3- --> 2Na+ + NO3- + BaSO4
Skrócona jonowa
Ba+2 + SO4-2 -> BaSO4
2.
CuSO4 + 2 NaOH -> Na2SO4 + Cu(OH)2
Cu+2 + SO4-2 + 2Na+ + 2OH- --> 2Na+ + SO4-2 + Cu(OH)2
Cu+2 + 2OH- --> Cu(OH)2