Question

pb + h_{3}po_{4} → pb_{3}(po_{4})_{2}
decomposition
combustion
synthesis
double replacement
single replacement

Explanation:

Step1: Analyze the reaction type

A single - replacement reaction has the general form \(A + BC
ightarrow AC + B\). A double - replacement reaction has the general form \(AB+CD
ightarrow AD + CB\). A synthesis reaction has the general form \(A + B
ightarrow AB\). A decomposition reaction has the general form \(AB
ightarrow A + B\). A combustion reaction is a reaction with oxygen, usually producing carbon dioxide and water (for hydrocarbon combustion).
For the reaction \(Pb + H_{3}PO_{4}
ightarrow Pb_{3}(PO_{4})_{2}\), we need to balance it first. The balanced equation is \(3Pb + 2H_{3}PO_{4}=Pb_{3}(PO_{4})_{2}+3H_{2}\).
In this reaction, lead (\(Pb\)) replaces hydrogen (\(H\)) in phosphoric acid (\(H_{3}PO_{4}\)).

Answer:

single replacement