Question

KOH+H2O= KOH+HNO3= KOH+CO2= KOH+H3PO4= KOH+Mg=

Answer 1

KOH+H2O= \\\
KOH+HNO3=KNO3 + H2O
2KOH+CO2=K2CO3 + H2O
3KOH+H3PO4=K3PO4 + 3H2O
KOH+Mg=\\\
\\\- не идут реакции

Answer 2

KOH + H2O = KOH(aq) + H2O(l)

KOH + HNO3 = KNO3(aq) + H2O(l)

KOH + CO2 = K2CO3(aq) + H2O(l)

KOH + H3PO4 = KH2PO4(aq) + H2O(l)

KOH + Mg = Mg(OH)2(s) + H2(g)