Question

What is the van’t Hoff factor for NaCl if it completely dissociates in water?

Answer 1

2 is the van’t Hoff factor for NaCl if it completely dissociates in water.

Explanation:

Formula used :

`\alpha =(i-1)/(n-1)`

`\alpha` = Degree of dissocation.

n = number of ions produced by dissociation of ionic compound

i = van't Hoff factor

We have:

`NaCl(aq)\rightarrow Na^+(aq)+Cl^-(aq)`

n = 2.
`\alpha = 100\%=1`

`1=(i-1)/(2-1)`

i = 2

2 is the van’t Hoff factor for NaCl if it completely dissociates in water.

Answer 2

NaCl is a compound that will dissociate into one Na- and one Cl+ ion in water. Because the Van't Hoff factor of an ionic compound is equivalent to the number of ions in the ionic formula, the Van't Hoff Factor is two.