Concentration by mass is defined as the mass of the solute divided by the total mass of the solution and multiplied by 100.
Parts per million (or ppm) is defined as miligrams of solute per liter of solution. The first think that stands out is that you must go from mass of solution, which is used in concentration by mass, to volume of solution, or vice versa.
This is done by using the solution's density, which is usually given to you or assumed to be equal to the density of water,
Here's an example of how you'd calculate concentration by mass using ppm. Let's assume you have
you know that you have a
This will get you to determine how many grams of
Now, the density of a
Thus, the concentration by mass of the
For ppm, you must go from grams to miligrams for the solute
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