V = 3.4 mg Red Dye / 0.17 mg/L
= 20 Liters of water in the fish tank.
Congratulations! You've made it to the end
of the first lesson!
Now you can explore some real-life examples of how these experiments
do environmental scientists use these kinds of experiments in real
Scientists can add a harmless tracer
dye to a body of polluted water, and see where the dye goes.
This can help them trace the paths that other pollutants have taken
in the water.
If the dye reaches an equal concentration
everywhere, they can measure what the final concentration of the
dye is. From the concentration and the mass of dye added,
they can calculate the volume of the body of water.
If there are other pollutants in
the water, the scientists can calculate how much of them were dumped
into the water. Here's how: they would know the volume
of the water from their tracer dye experiment. Then they could
estimate the amount of the pollutant dumped, using the same equation
m = c x v .
an actual project using tracer dye!
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