Question

what solid would form when phosphoric acid (h₃po₄) is added to milk of magnesia (mg(oh)₂)? answer: a mgo b mg₃(po₄)₂ c mg(oh)₂ d mgpo₄

Explanation:

Step1: Write the chemical reaction

Phosphoric acid ($H_3PO_4$) reacts with milk - of - magnesia ($Mg(OH)_2$) in an acid - base reaction. The general form of an acid - base reaction is acid + base → salt + water. The chemical reaction is $2H_3PO_4+3Mg(OH)_2
ightarrow Mg_3(PO_4)_2 + 6H_2O$.

Step2: Identify the solid product

In the above reaction, water ($H_2O$) is in the liquid state and $Mg_3(PO_4)_2$ is an insoluble solid (a precipitate).

Answer:

B. $Mg_3(PO_4)_2$