PhET Computer Simulation Activity: Acid-Base Solutions and pH Scale
PhET Investigation of Acids-Bases
Name:__________________________________________
Part A.
Introduction
1. Take a few minutes to play with the sim (http://phet.colorado.edu/en/simulation/acid-
base-solutions). Check out both the Introduction and Custom Solution tabs. Explore
what factors affect pH. List the factors you found that affect pH.
Investigating Concentration Changes
2. a. Create a strong acid solution in the “Custom Solution” tab.
b. Draw bar graphs for Initial and Equilibrium concentrations.
Hints: No calculator needed – try the ‘Equilibrium Concentration’ view.
Don’t forget to label your graphs!
Initial Concentrations Equilibrium Concentrations
c. What equilibrium concentrations are affected by changing the initial concentration?
3. a. Create a weak acid solution in the “Custom Solution” tab.
b. Draw bar graphs for Initial and Equilibrium concentrations.
Hints: No calculator needed – try the ‘Equilibrium Concentration’ view.
Don’t forget to label your graphs!
Initial Concentrations Equilibrium Concentrations
c. What equilibrium concentrations are affected by changing the initial concentration?
