What
can concentrations in water tell us? (Continued)
Answer: 3 g/L 
Now that wasn't so hard, was it?
(Show how you got your answer on a piece
of paper.)
Here's another way to look at concentration:
If we put the same amount of Cherry KoolAid in an unknown amount
of water (for example, a fish tank) and mixed the KoolAid
into solution, how could we know the volume of the water in
the fish tank? To find that out, you could take a small sample
of the solution and measure the concentration of the red dye.
Then you could use the formula
v = m / c to calculate the amount of water in the fish tank.
Since c = m / v,
then c * v = m
and v = m / c
Brain
Twister: 
If
you measure the concentration (c) of the Red Dye #40 to be 0.17
mg/L, what would the volume of the fish tank be? 
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Introduction
 Objectives  PreTest
 Presentation  Activity
 PostTest
PEER Curriculum
 Water
Quality Modules 
Teacher's
Pages  Standards
