I don’t know but my guess is 80
Its a form of anaesthesia used by dentists
hope that helsp
The solution of Ba(OH)2 will have the lowest freezing point. This is because it dissociates into 3 ions, one Ba and 2 OH, which is more than any of the others. Freezing point depression is a colligitive property of water that depends, in part, on the number of ions.
hope it helps
