00:01
The concept involved here is molarity.
00:02
That is the method to determine the concentration of solution.
00:06
That is the number of moles of solute dissolved in one letter of solution.
00:12
So now, first of all, molarity, that's equal to number of moles of solute divided by volume of solute and according to definition this should be in letter if it is not a letter then we have to convert that so further we can write that number of moles of n acl so that's equal to molarity multiplied by volume so that's equal to molarity we have 0 .250 molar multiplied by volume we have.
01:18
This will be 2 ,500 .0 milliliter, okay? so convert into liter, so we will divide it by 1 ,000 liter, okay? 1000 milliliter, because one letter consists of 1 ,000 milliliter.
01:34
So this will be equal to this will be 0 .0.
01:38
6 to 5 moles.
01:41
So that are the number of moles.
01:43
Now b part.
01:45
So the moles of ions, so that can be given by nacl.
01:50
So this nacl dissociate to form solution to na positive and cl negative ions...