Goal: The goal of this chemistry scenario is to help students learn about acids, bases, and the processes of titration and neutralization. The scenario invites students and instructors to talk about a variety of molecular and system-wide behaviors in a closed particle system through an audiovisual and embodied experience.

Some of the learning objectives for the scenario include:

• Identifying the key properties of acids and bases
• Describing the processes of ionization and dissociation
• Predicting reactions between particles in solution
• Describing the process of neutralization and its relation to pH
• Describing the process of titration and the role of an indicator at a molecular level
• Observing how energy affects the overall activity of the system

The Scenario: The interactive scenario has three main interaction areas:

• the water volume - the main activity space where students can add particles and observe how particles react with one another.
• the molecules - A student can add a particle to the system by selecting a molecule from one of three selectable areas, one for Acids, one for the Indicator, and one for Base. Students use the glow balls to select and drop a molecule into the water. Particles can also be added at different velocities based on the speed and direction of the ball at time of placement
• the pH display - The pH panel is a numerical system status display of the pH based on the number of hydronium and hydroxide particles present in the water.

As the particles move around water, students can watch as well as listen to the different types of reactions between particles.

To facilitate transitions between action and discourse, the teacher has the ability to pause, play, and restart the scenario using a hand-held game-pad device.