Final answer:
The reaction Na3PO4 + 3 KOH → 3 NaOH + K3PO4 is a double displacement reaction, where the ions from two compounds exchange partners to form two new compounds.
Step-by-step explanation:
The chemical equation Na3PO4 + 3 KOH → 3 NaOH + K3PO4 represents a double displacement reaction. In this type of reaction the cations and anions of two different compounds switch places, forming two new compounds. the Na+ ions from the sodium phosphate (Na3PO4) swap places with the K+ ions from the potassium hydroxide (KOH) resulting in the formation of sodium hydroxide (NaOH) and potassium phosphate (K3PO4).