2. Complete the Teaching Idea "Concept Questions for Chemistry using PhET" posted by Trish Loeblein on the pH Scale simulation at PHET.
1. The color of a solution identifies if it is an acid, base, or neutral solution. True or False
Answer: False: The pH determines where it is a base or acid. If the pH is above 7 is a base and below 7 is a acid. If solution was 7 it would be neutral solution.
2. Which is a solution is basic?
Answer: D. More than one Solution B and C are both above 7.0. This makes them basic.
3. Which solution is acidic?
Answer: C. The high level of H30+ in C shows that C is acidic.
4. Which solution is basic?
Answer: B. This is because B is basic with OH- at -2.
5. Which solution is more acidic?
Answer: D. More than one.
6. How will adding water effect the pH?
Answer: A: Increase the pH. Water deludes it, the pH goes up and the acidity goes down.
7. How will equal amount of water effect the pH?
Answer: Decrease the pH.
8. What is the order from most acidic to most basic?
Answer: A. ABC. The lower the pH the higher the acidity. The higher the pH the more basic it is. So the order would be from smallest to largest is A,B,C.
9. What is the order from the most acidic to most basic?
Answer: E. C,A,B. The higher the bar on the graph for the H30+ the more acidic the solution is. The order from largest to smallest is C,A,B.
10. If spit has a pH= 7.4, what does that tell you about the water equilibrium?
Answer: 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-Bases Solutions simulation.
Here are my results from the simulation.
This is a great and organized post Kelsey. Questions like #8 and #9 in the first activity are great ways for students to demonstrate what they have learned about acids and bases, but they also are activities that require critical thinking. Instead of just saying this solution has a pH of 8, this solution has a pH of 4, etc. having students rank them in order takes it a step further to really think about ordering them in terms of their pH.
ReplyDeleteI really like your explanations to all of your questions. It is clear that you have a good understanding of pH levels as you state the correct answers and explanations to these questions. Our answers seem to match up, giving me greater confidence that I too know what I am doing. Thanks!
ReplyDeleteSome of these questions were a bit confusing to me but im glad our answers are similar so that I know im doing this right. Your explanations show how good of an understanding you have. Great job.
ReplyDeleteI got a majority of the same answers as you did, this is reassuring. I liked this simulation and I think it would be a great tool for students to learn about acids and bases. This would probably be for older children but something along these lines with lemon juice and soap water it would be great for younger children's understanding of the topic.
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