How many PO43? ions are in a mole of K3PO4?

K₃PO₄ → 3K⁺ (aq) + PO₄³⁻ (aq)

One mole of PO₄³⁻ ion gets dissociated from one mole of K₃PO₄

As per the definition of Avogadro's number, 1 mole = 6.022 x 10²³ ions

One mole of PO₄³⁻ ions x (6.022 x 10²³ ions / 1 mole of PO₄³⁻ ions)

= 6.022 x 10²³ ions

Therefore, there are 6.022 x 10²³ PO₄³⁻ ions in a mole of K₃PO₄.