Thanks Gwynfor!
¡Gracias Julio!
I get a closer value to the thoretical value with the @CLEAPSS
microscale version. (Lower vol of air in the way.) See https://youtu.be/XV8LojqCz-A. I can even do it in a Petri dish with 2M ammonia,, not conc. . See https://youtu.be/BQoZ4vY66Jo. There's a black printed circle on the paper.
In order to achieve these effects, there have been in the the order 1,000,000,000 collisions per second with particles moving at over 1 million miles per hour. These are mind boggleing figures to appreciate, but more imporantly to imagine and use in medelling.
I love the idea of using cotton buds in the bungs to make the whole set up easier.
Another added extra that I use is to have a long strip of UI paper running along the bottom of the tube. This shows the progress of each gas through to where they meet. I also use a visualiser to project the tube up on to the white board so that the students aren't all huddled around the fume cupboard (which is most definitely not covid compliant!).
Unsuitable or offensive? Report comment