Wed. Nov 13, 2013
Chemistry 1 – We continued our analysis of variables that affect gas pressure. Today we analyzed the inverse Pressure vs. Volume data collected yesterday. I walked the class through creating a Calculated Column in LoggerPro and how to use that to linearize the graph by plotting Pressure vs. Inverse Volume.
Physics 1 – Inspired by Frank Noschese I set up the above multi-tension interaction situation. If you can’t tell, two spring scales are supported on either side, my classes easily agreed that these two scales would read equal amounts of force. I added the 3rd scale in the middle but covered up where it can be read. Groups whiteboarded a solution to predict the reading of the middle scale.
Chemistry 2 – Groups continue to titrate household items. Above you can see this group is analyzing mouthwash which has an acid listed in the ingredients list. We are using Vernier pH sensors to collect pH data, but we are NOT using the Drop Counter they have available. I feel using the drop counter would be cheating, there is still value in reading a buret correctly and stopping and stirring the solution. Yes it takes longer, but I feel it gives the students good practice at a variety of lab techniques used in college and industrial chemistry labs.