Answer: 8 mol
Explanation of the solution to the problem: in order to solve this problem, you first need to draw up the equation for the dissociation of iron (III) chloride for one mole of the substance:
FeCl3 = Fe (3+) + 3Cl (-).
Now we consider how many moles of ions are formed during dissociation: 1 + 3 = 4 moles of ions (1 mole of Fe (3+) and 3 moles of Cl (-)).
Thus, if the amount of moles of the dissociating substance is doubled, then the number of moles of ions formed as a result of the reaction will increase by 2 times, that is, it will be equal to 8.
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