NaOH+H2SO4 ->
Ba(OH)2+HNO2->
Zn(OH)2+HMnOu->
All(OH)3+HCl->
Fe(OH)3+HNO3->
KOH+HCNS->
Ca(OH)3+H2S->

Na (OH) 2+HNO2-gt; NaNO2 + H2O
Ba(OH)2+HNO2-gt; Ba( NO3)2 + H2O
Zn(OH)2+HMnOu-gt; ZnMnOu + H2O
All(OH)3+HCl-gt; AlCl3 + 3H2O
Fe(OH)3+HNO3-gt; FeNO3+ H2O
KOH+HCNS-gt; KCl + H2O
Ca(OH)3+H2S-gt; Ca(HS)2 + 3H2O