Electrolysis of Potassium Iodide
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- čas přidán 10. 09. 2024
- Microscale reaction in bent glass tubing!
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Very good demonstration method and excellent presentation by Bob.
Very nice! This is the first video to give me somewhat of an intuition as to what reactions will happen instead of others. Basically, the only ones that will happen are the two half equations that are closest together. And only between the two water half equations.
But then that Nernst equation can come along and mess everything up if you have nonstandard concentrations. Chemistry can be really fun.
learning to make a u-tube on CZcams.
great learning moment for a chemistry teacher myself!!
Why has glass blowing been removed from chemistry courses.
Because like everything else, the bureaucrats and institutions manage to suck the 'soul' out of everything cool...that, and the attitude in modern synthetic chemistry is more focused on publishing quick and easy papers to boost reputation and fame, rather than a genuine interest in the science. A love of the apparatus used in chemistry, translates to a love of the 'old ways', and to most: those ways are dead...but, not to me, and a select few others.
Good teacher
Thank you! 😃
Must one add indicator to this? Am finding it difficult to write a half reaction for this. Is the result produced here going to be different when one use a beaker?
What would happen if you had Copper electrodes in a solution of potassium Iodide, so the ions present H+, Cu (metal), OH-, K+, I- ?
@I2play; The Copper electrode on the left would form CuI2 but it is unstable and would disproportionate into CuI(s) and sink to the bottom as a pale powder and also make I2 (2CuI2 -> 2CuI(s) + I2) so it would look similar but with a powder precipitating on the left side. The right side would produce Hydrogen and would also form a basic solution with the indicator so the right hand side would look much the same.
This was a great experiment and video. Thanks for posting this. We have reproduced this at home.
Great video
i thought iodine form crystals near the electrode but it dosen't , all forming iodine was dissolving in the solution right? in our exam paper they asked what is the observation near the anode and i wrote forming iodine crystals... i think am screwed!! :( shit!!!
You normally won't form a halogen from electrolysis of one of it's salts dissolved in water. However molten KI, NaCl, NaBr etc. that is melted down and electrolysis done to the molten ionic compound will yield the respective elements.
TheHotmud It does form some Cl2 when you use NaCl in water. It mostly stays dissolved in the water and reacts with the water to form Cl- and ClO-. I think it is the same for a bromide salt. For iodine, it is different. I2 can bind with a I- and form the triodide ion.
awesome
I was a little surprised when he said that cell potentials and E0 values would be introduced to the Honours students- that was year 12 for me. Anyone else had experience with this?
How is make a lead acetate solution
"Enough to last you a lifetime! ... Or, at least a school year."
👍
The reason nobody knows how to do any of this or what any of it is anymore is because gawd forbid anyone actually do something useful in school anymore... Nevermind possibly get hurt.
Today's kids will never know the fun we had. It's really sad. I'm pretty tired of dealing with the crap that the school system has been putting out for the past couple decades (at least).
13:26 *wow*