00:03
Hey there.
00:04
In this question, we are trying to calculate the molarity of a solution.
00:08
So molarity is calculated by taking the moles of solute and dividing by liters of solution.
00:22
All right, so we're putting the solute in the solution.
00:25
So let's go ahead and do that.
00:27
Our solute is the sodium chloride here, and we have 5 .85 grams of the nacl.
00:36
For the solution, we are told that we have 500 milliliters.
00:46
All right, so we have solute in solution here, but neither of our units are correct for molarity.
00:52
Notice the numerator needs to be in moles, and the denominator needs to be in liters.
00:57
So we need to do some dimensional analysis to allow us to convert.
01:02
So first i'm going to work with the numerator.
01:04
I need to convert from grams to moles, and whenever we're converting from grams to moles, we use the molar mass.
01:10
We get the molar mass by adding together the individual masses of each element from the periodic table.
01:15
So adding one sodium and one chlorine together, adding those masses together, we get 58 .44 grams...