Fri. Nov 8, 2013
Chemistry 1 – After looking at the PhET “Gas Properties” simulation yesterday we were able to discuss, How can you measure a gas you can’t see. Having exposure to the computer model allowed the class to come up with the list above. I was able to use the list to discuss what gas pressure actually measures, as well as to be able to discuss controlled, independent, and dependent variables. We used this as an introduction to the gas labs we will conduct the next few class days. We decided that the amount or number of gas particles will have the largest affect on pressure.
Physics 1 – We set up two force sensors to “duel it out.” Using the two sensors we were able to easily test a variety of the situations we’ve been working to analyze. Now we are doing so quantitatively, looking at the difference between object A’s push on B and object B’s push on A. The results are shocking (at least in high school physics student’s minds!)
Chemistry 2 – As I was looking for information on titrating household items I came across a really neat neutralization demonstration. In the Flinn ChemTopics Acids and Bases book the demonstration called MOM to the Rescue was a really neat way to visualize neutralization of a weak base with a strong acid. I also used it to stress the importance of stirring a neutralization reaction solution, since we will be titrating next week.