Question

Aluminum sulfate is added to tripotassium phosphate. What kind of chemical reaction is this?

Al2(SO4)3 + K3PO4 > AlPO4 + K2SO4


Single Replacement

Synthesis

Decomposition

Double Replacement

Combustion

Answer 1

Double Replacement

Step-by-step explanation:

Let's consider the following balanced reaction that occurs between aluminum sulfate and tripotassium phosphate.

Al₂(SO₄)₃ + 2 K₃PO₄ ⇒ 2 AlPO₄ + 3 K₂SO₄

This is a double replacement reaction because both salts exchange their cations and anions. So, PO₄³⁻ takes the place of SO₄²⁻ in Al₂(SO₄)₃ and SO₄²⁻ takes the place of PO₄³⁻ in K₃PO₄.