$Na_2S + 2HCl \to H_2S + 2NaCl$
$2KOH + H_2SO_4 \to K_2SO_4 + 2H_2O$
$Ba(NO_3)_2 + H_2SO_4 \to BaSO_4 + 2HNO_3$
$NaOH + HCl \to NaCl + H_2O$
$MgSO_4 + Ba(NO_3)_2 \to BaSO_4 + Mg(NO_3)_2$
$AgNO_3 + HCl \to AgCl + HNO_3$
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Na2S+2HCl→H2S+2NaClNa2S+2HCl→H2S+2NaCl
2KOH+H2SO4→K2SO4+2H2O2KOH+H2SO4→K2SO4+2H2O
Ba(NO3)2+H2SO4→BaSO4+2HNO3Ba(NO3)2+H2SO4→BaSO4+2HNO3
NaOH+HCl→NaCl+H2ONaOH+HCl→NaCl+H2O
MgSO4+Ba(NO3)2→BaSO4+Mg(NO3)2MgSO4+Ba(NO3)2→BaSO4+Mg(NO3)2
AgNO3+HCl→AgCl+HNO3
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