Thomas B. Greenslade is (was?) an important and influential science educator.
As a much younger man (1933), he wrote this article explaining (for first year college students), the action of a solute in lowering the freezing point of a mixture.
https://pubs.acs.org/doi/abs/10.1021/ed010p353
What do you think? Is it an ok explanation?
Well, the last time I did any chemistry was first year uni, so I guess I’m pretty close to his target audience.
I think it needs a good deal more expansion around the words “the salt dissolves in the water and we have a solution in contact with the ice”. After looking at that sentence for a looong time I finally figured out what he meant (essentially, whenever an ice-bond is broken a solute molecule can slip in the gap, making it harder for the ice-bond to re-form, and the whole thing goes slushy). But at first sight it seems to be assuming what it’s trying to prove (“dissolves in the water”? What water? Isn’t it ice?)
For a modern audience I’d say “more pics please”