I’ve been watching you for years and I’ve learnt a lot from your videos and demos and I’ve done a fair few of your demos with my students and they love it. If possible, I was wondering if you could do more demos for lower secondary; I teach lower secondary and I need more inspiration :) Thank you for doing these videos. I want to let you know they make a difference and my students over the years have fallen in love with chemistry enough to take it at a higher secondary level, which is what teaching is all about!
I think an easier demo of Avogadro’s law is electrolysis of water because you can clearly see that you get twice the volume of hydrogen to oxygen. I would love to see more videos explaining class practicals for KS4 if possible.
I've tried the electrolysis of water and I never got the 2:1 ratio as perfectly as I wanted. I think it's a combination of gases partially dissolving in the electrolyte instead of bubbling out, as well as secondary reactions as the pH changes near the electrodes. Reactions with the electrodes were also a concern until I changed to platinum. In the end I have never managed to get the expected 2:1 ratio reliably. I'd love to see a setup like that, though.
haha the people have spoken ... I *was* going to do the gallium beating heart next but maybe I'll pt that on the back burner. I suppose most advanced demos can of course be used lower down the school with simpler explanations/objectives (e.g. beyond the blue bottle can go from "chemical change: colour change" to "redox potentials" .. likewise hydrogenation and saturation/unsaturation is suitable at KS4, and the rainbow fizz demo can be used from the youngest ages for evidence of chemical changes, right up to a full-on study of pH curves and indicators.. but I'll see what I can think of that's even simpler for next time! :)
I’ve been watching you for years and I’ve learnt a lot from your videos and demos and I’ve done a fair few of your demos with my students and they love it. If possible, I was wondering if you could do more demos for lower secondary; I teach lower secondary and I need more inspiration :) Thank you for doing these videos. I want to let you know they make a difference and my students over the years have fallen in love with chemistry enough to take it at a higher secondary level, which is what teaching is all about!
I think an easier demo of Avogadro’s law is electrolysis of water because you can clearly see that you get twice the volume of hydrogen to oxygen. I would love to see more videos explaining class practicals for KS4 if possible.
I've tried the electrolysis of water and I never got the 2:1 ratio as perfectly as I wanted. I think it's a combination of gases partially dissolving in the electrolyte instead of bubbling out, as well as secondary reactions as the pH changes near the electrodes. Reactions with the electrodes were also a concern until I changed to platinum.
In the end I have never managed to get the expected 2:1 ratio reliably. I'd love to see a setup like that, though.
haha the people have spoken ... I *was* going to do the gallium beating heart next but maybe I'll pt that on the back burner. I suppose most advanced demos can of course be used lower down the school with simpler explanations/objectives (e.g. beyond the blue bottle can go from "chemical change: colour change" to "redox potentials" .. likewise hydrogenation and saturation/unsaturation is suitable at KS4, and the rainbow fizz demo can be used from the youngest ages for evidence of chemical changes, right up to a full-on study of pH curves and indicators.. but I'll see what I can think of that's even simpler for next time! :)