Halloween clock reaction

Halloween clock reaction is a modification of classic Landolt clock reaction.

Category:

Education

Tags:

• Landolt
• red
• iodine
• starch
• clock
• reaction
• chemical
• kinetic
• Halloween
• mercury
• HgCl2
• demonstration
• experiment
• chemistry
• concentration
• rate
• Marijeta
• Savic
• Filip
• Bihelovic

[Musiiqueful]

@michalchik Why does it turn amber, and then purple black? Am I right to think that its due to the iodine ions turning into trioiodide ions? so that shows the amber colour change, and then when reduced back to iodine ions it goes purple-black?

Please help :) Thank you

[halolamer]

Wadsworth Constant checking in at 00:15

[x8Charlotte8x]

this is lovely!!!!!!!!!!!!!!!! i'm doing the iodine clock as part of my a-level chem coursework, but i wish it was red like this!!!!!!

[marcosmourafera]

oke é iso ????? kakakakañão entendi pik4 nem uma

[WrathOfPookie]

@T3CHNOCIDE If you know your chemistry and haven't heard about clock reactions, it's not that hard to guess. I didn't know they were called clock reactions until recently, but I'd seen this sudden change in Iodine/thiosulphate/starch titrations where we were determining initial rate. Our teacher only thought to show us clock reactions when we'd finished the syllabus..

[T3CHNOCIDE]

@DarthPickley For someone who has never heard of them are a great guesser (cough cough), yes, clock reactions are a way of calculating the initial rate of reaction by tming a measurable change at different conditions (Concentration, Temperature, pH, etc.). We can then use Delta Change over Time to get the rate

[DarthPickley]

hmm, not having previously heard of these clock reactions, I am guessing that they started out with different concentrations, or at least ratios of concentrations, so that there is less resistance to pH change on the one on the left than for the one on the right. is this correct?

[djteac]

i don't know what stranger. The reaction OR THE MUSIC.

Who picked that tune dude? lol