Question: how many moles of ions are present when they are dissolved in water?
Answer: First, NaCl is very soluble in water. There are two moles of ions (one sodium and one chloride) on the product side. A mole is Avagadro's number. 2 moles x 6.02 x 10^23 ions/mole = 1.2 x 10^24 ions.