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dang' love that!
VideoGameCoupons 1 week ago
@kaglioster
Thanks again.
How long does it keep oscillating ? Does the frequency keep decreasing due to some reaction reaching equilibrium ?
aamrun 1 year ago
la raja
ulisespereira 2 years ago
Comment removed
GulfLanderNoside 2 years ago
hmm
GulfLanderNoside 2 years ago
What is in the flask ?
aamrun 2 years ago
@aamrun
Potassium bromate, Cerium (IV) sulfate, propanedioc acid and citric acid in a solution of sulfuric acid
kaglioster 1 year ago
@kaglioster
Thanks for the info ! ( Although it was late by a year :) )
Why do we need the two organic acids ? Do the conjugate bases play some role in the mechanism ?
aamrun 1 year ago
@aamrun
Smart question!
I know for sure that the propanedioic acid is indispensable for the reaction, because the cerium(IV) ions is reduced by propanedioic acid to cerium(III) ions, which are then oxidized back to cerium(IV) ions by bromate(V) ions.
I think (but i'm not sure about that) that citric acid form a complex with cerium(III) ions, so they are oxidized back to cerium(IV) slowly enough to observe a slow oscillation. Bu that's just a hypothesis.
kaglioster 1 year ago