On a molecular level, why are some substances acidic, some basic, and some neutral? Be specific. Write an equation showing the dissociation of an acid, and write an equation showing the dissociation of a base. (These equations were shown in your lessons.)

Using your observations from the PhET simulation, explain the difference between strong and weak acids. Make a simple sketch to support your explanation.

How are strong acids and strong bases similar? Use observations from the simulation as evidence in your explanation.

Read through the "Conducting the Experiment" section, and then identify the independent (i. e., manipulated), dependent, and controlled variables in this experiment. (List at least 5 controlled variables.)