Question

H3PO4 + NaOH -----> ???
H3PO4 + Al(OH)3 -----> ???
H3PO4 + NH4(OH)----->???
H3PO4 + Ca(OH)2----->???
H3PO4 + Mg(OH)2------>???

Answer 1

H3PO4 + Al(OH)3 → AlPO4 + 3 H2O

3 NH4OH + H3PO4 → (NH4)3PO4 + 3 H2O

2 H3PO4 + 3 Ca(OH)2 → Ca3(PO4)2 + 6 H2O

2 H3PO4 + 3 Mg(OH)2 → Mg3(PO4)2 + 6 H2O