FeSO4 +2NaOH =>Fe(OH)2 +Na2SO4
Fe2+ +2OH- =>Fe(OH))2
NaNO3 + CuSO4 khong phan ung
HClO+KOH =>KClO+H2O
HClO+OH-=>ClO- +H2O
FeS +2HCl =>FeCl2 +H2S
FeS +2H+ =>Fe2+ +H2S
a) FeSO4 + 2 NaOH\(\rightarrow\)Fe(OH)2+Na2SO4
Fe2++2OH-\(\rightarrow\)Fe(OH)2
b) NaNO3 + CuSO4(không phản ứng)
c)HClO + KOH \(\rightarrow\) KClO+H2O
HClO + OH-\(\rightarrow\) ClO-+H2O
d) FeS ( r ) + HCl \(\rightarrow\) H2S +FeCl2
FeS ( r ) + H+\(\rightarrow\) H2S +Fe2+