The second method involves determining the osmolarity from the molarity. Now we're going to say if the molarity of a compound is known, then the osmolarity for each of its ions can be determined by osmolarity=number of ions that are within that compound × the molarity of the compound overall.
So this is yet another way that we can isolate osmolarity. Now that we've seen this second method, click on to the next video and let's take a look at a question where we're asked to calculate the osmolarity of a particular aisle.