Kevin's Experiment
Kevin's Experiment
Kevin sets up a simple science experiment. He fills a test tube with sodium hydroxide solution. Then, he ties a string around the test tube and pulls it tight under the stopper of a flask containing a copper sulfate solution. When Kevin releases the string, the test tube falls into the copper sulfate solution and the two solutions combine. A diagram of the setup is shown.

Multiple Choice Question
Which statement BEST describes Kevin's science experiment?
A.
The experiment shows an example of a physical change because the products have the same properties as the reactants.
B.
The experiment shows an example of a chemical change because the products have different properties than the reactants.
C.
The experiment shows an example of a chemical change because the products have the same properties as the reactants.
D.
The experiment shows an example of a physical change because the products have different properties than the reactants.
1 answer
The correct answer is:
B. The experiment shows an example of a chemical change because the products have different properties than the reactants.
This is because combining sodium hydroxide (a strong base) with copper sulfate (a salt) typically results in a chemical reaction that produces new substances (like copper hydroxide), which have different properties than the original reactants.
