a)
\(\left(1\right)FeCl_2+Ba\left(OH\right)_2\rightarrow BaCl_2+Fe\left(OH\right)_2\downarrow\)
\(\left(2\right)Fe\left(OH\right)_2\underrightarrow{t^o}FeO+H_2O\)
\(\left(3\right)FeO+H_2SO_4\rightarrow FeSO_4+H_2O\)
\(\left(4\right)FeSO_4+2KOH\rightarrow K_2SO_4+Fe\left(OH\right)_2\downarrow\)
b)
\(\left(1\right)MgO+H_2SO_4\rightarrow MgSO_4+H_2O\)
\(\left(2\right)MgSO_4+BaCl_2\rightarrow MgCl_2+BaSO_4\downarrow\)
\(\left(3\right)MgCl_2+2AgNO_3\rightarrow Mg\left(NO_3\right)_2+2AgCl\downarrow\)
\(\left(4\right)Mg\left(NO_3\right)_2+2NaOH\rightarrow Mg\left(OH\right)_2\downarrow+2NaNO_3\)
a) FeCl2+2NaOH--->2NaCl+Fe(OH)2
Fe(OH)2--->FeO+H2O
FeO+H2SO4--->FeSO4+H2O
FeSO4+2NaOH-->Fe(OH)2+Na2SO4
b) MgO+ H2SO4--->MgSO4+H2O
MgSO4+ BaCl2---->MgCl2+BaSO4
MgCl2+ 2AgNO3---->Mg(NO3)2+ 2AgCl
Mg(NO3)2+ 2NaOH---> Mg(OH)2+2NaNO3
a, \(1.\text{FeCl2 + 2NaOH → NaCl + Fe(OH)2}\)
\(2.\text{Fe(OH)2 → FeO + H2O}\)
\(3.\text{FeO + H2SO4 → H2O + FeSO4 }\)
\(4.\text{2NaOH + FeSO4 → Na2SO4 + Fe(OH)2}\)
b,\(1.\text{H2SO4 + MgO → H2O + MgSO4}\)
\(2.\text{BaCl2 + MgSO4 → MgCl2 + BaSO4}\)
\(3.\text{2AgNO3 + MgCl2 → 2AgCl + Mg(NO3)2}\)
\(4.\text{Mg(NO3)2 + 2NaOH → Mg(OH)2 + 2NaNO3}\)
