00:01
So in this question, you need to calculate the molarity, molality, and mole fraction based off of the given data.
00:09
So let's do an example calculation for hydrochloric acid.
00:13
Malarity would be molds of the solute over volume of solution.
00:19
Let the total volume of solution equal one liter.
00:22
We're going to convert from the volume of solution to the mass of solution using the density.
00:27
So we'll convert from liters to milliliters.
00:29
And then from milliliters, two centimeters cubed, and then to the mass in grams.
00:35
That gives us the mass of the solution.
00:37
Now we're going to find the mass of the solute.
00:42
We know the mass percent of the solute, which is hcl.
00:46
So we can set up an algebraic expression, and we can solve for x, which is the mass of solute in grams.
00:54
So once we get the mass of a solute, we have to convert to moles by dividing by the molar mass.
00:59
Then we'll take the moles of the solute that we calculated and divide by the volume of solution, which was one liter to get the molarity...