Video Transcript
In the diagram, one beaker contains
a dilute acid, one beaker contains water, and one beaker contains a concentrated
acid. Which beaker contains the
concentrated acid?
We have been given three beakers
labeled one to three. We know that one contains water and
two contain acid. As only two of the beakers contain
the green and white molecules, the green and white molecules must represent the
acid. Beaker two must therefore contain
water. The blue circles represent water
molecules. These molecules can also be found
in the beakers containing acid. Thus, the acidic substances are
dissolved in water.
Now that we know which beakers
contain acid, we need to determine which acid is dilute and which is
concentrated. If a large amount of a substance is
dissolved in a given volume, the solution is concentrated, whereas if a small amount
of a substance is dissolved in a given volume, the solution is dilute. Beaker one depicts a small number
of acid molecules, whereas beaker three depicts a large number of acid
molecules. Both beakers contain the same
volume of liquid. Therefore, beaker one contains a
dilute acid, and beaker three contains a concentrated acid.
The beaker which contains the
concentrated acid is beaker three.
