Activity Seven!

Activity Tasks:

1. Review the Content Slides Acids and Bases on the D2L site.

2. Complete the Teaching Idea “Concept Questions for Chemistry using PhET”  posted by Trish Loeblein on the pH Scale simulation at PHET (http://phet.colorado.edu/en/simulation/ph-scale). On your blog post the answers with your scientific explanations from the “Clicker Questions pH Scale” posted by Trish.

 1. The color of a solution identifies if it is an acid, base, or neutral solution.
            Answer: B-false.  The color doesn’t always determine if the solution is an acid, base, or neutral.
2. Which solution is basic?
            Answer: D-more than one.  If the pH is greater than 7 than the solution is a basic.
3. Which solution is acidic?
            Answer C.  This has a higher concentration of H.
4. Which solution is basic?
            Answer: B.  This has a lower concentration of H.
5. Which solution is acidic?
            Answer: D.  A and B have higher levels of H.
6. How will adding water effect the pH?
            Answer: A.  Water dilutes the acid which increases the pH.
7. How will equal amount of water effect the pH?
            Answer: B.  The pH decreases when water is added.
8. What is the order from most acidic to most basic?
            Answer: A. A,B,C.
9. What is the order from most acidic to most basic?
            Answer: C. B,A,C.
10. If spit has a pH = 7.4, what does that tell you about the water equilibrium?
            Answer: A-Something was added that made the equilibrium shift left.

3. Complete the Teaching Idea “Intro to Strong and Weak Acids and Bases” posted by Chris Bires on the Acid-Base Solutions simulation (http://phet.colorado.edu/en/simulation/acid-base-solutions) and post on your blog your data and answers to the questions posed.