1. Understand the Formula:
* K₃PO₄ represents potassium phosphate.
* The subscript "3" in K₃PO₄ indicates that there are 3 potassium (K) ions for every 1 formula unit of potassium phosphate.
2. Use Avogadro's Number:
* Avogadro's number tells us there are 6.022 x 10²³ particles (atoms, molecules, ions, etc.) in one mole of a substance.
3. Calculate the Number of K Ions:
* Step 1: Find the moles of K ions: Since there are 3 moles of K ions for every 1 mole of K₃PO₄, we have 6.76 mol K₃PO₄ * (3 mol K / 1 mol K₃PO₄) = 20.28 mol K
* Step 2: Convert moles of K ions to number of K ions: 20.28 mol K * (6.022 x 10²³ K ions/mol K) = 1.22 x 10²⁵ K ions
Therefore, there are approximately 1.22 x 10²⁵ potassium ions in 6.76 mol of K₃PO₄.
