can concentrations in water tell us?
is a measure of how much matter is in a given volume.
If we know
the volume of a liquid, and the mass of something added to it, we
can calculate the concentration. Let's take a look at
how this works:
A packet of
sweetened Cherry Kool-Aid contains 3.6 g of a mixture of substances.
The amount of Red Dye #40 is 3.4 mg, and the amount of sugar
is 3 g.
If we put a packet of Cherry Kool-Aid in a pitcher and added enough
water to make 1 liter of solution, the concentration of Red Dye
#40 in the solution would be:
= mass / volume
c = m / v
= 3.4 mg/ 1L = 3.4 mg/L
would be the concentration of sugar in the 1 liter of Cherry