Understanding the Formula

* KCl is the chemical formula for potassium chloride.

* The formula tells us that each KCl molecule contains one potassium ion (K+) and one chloride ion (Cl-).

Moles and Avogadro's Number

* One mole of any substance contains 6.022 x 10^23 particles (Avogadro's number).

Calculations

1. Moles of Cl- ions: Since there's one Cl- ion per KCl molecule, 2.00 mol of KCl contains 2.00 mol of Cl- ions.

2. Number of Cl- ions:

* Multiply the moles of Cl- ions by Avogadro's number:

2.00 mol Cl- * (6.022 x 10^23 Cl- ions/mol Cl-) = 1.20 x 10^24 Cl- ions

Answer: There are 1.20 x 10^24 Cl- ions present in 2.00 mol of KCl.