SOLUTION - LAB
OBJECTIVE:
Using what you know about solutions make a better bubble.
BACKGROUND:
When making solutions the amounts of the components can be varied. When
a solution is in equilibrium (in balance) no additional added solid
solute will dissolve, this is called a saturated solution. For example,
a cup of water at room temperature will dissolve a certain amount of
salt to a point that no more salt will dissolve. If this point of
"saturation" has not been met, the solution is said to be unsaturated.
Students will prepare "bubble" solutions
by combining various mixtures of ingredients and varying the saturation
levels of the solutions. The goal is to find the solution that results
in the best bubble.
This activity is best conducted outdoors
since it involves the use of water. If conducted indoors, be sure to
lay paper towels on the floor to prevent any falls.
PROCEDURE:
Have students predetermine the
ingredients and amounts to be used in the first trial solution of the
lab and have them record the data on the chart. Have students make the
first trial solution using the recorded data and test it. Using their
first solution as a basis, have them continue the process until they've
completed all four trials. Once students complete lab, ask a few
students what solution worked best for them and record data on
chalkboard. As a class, determine which key factors make for a good
bubble solution (the substances used, the amounts, whether the solution
was saturated or unsaturated, etc.) |