If two particles collide and they are under activation energy, why do they JUST “bounce apart”? Isn’t the activation energy steadily decreasing if those particles continuously collide? I always viewed the activation energy as a "barrier" that prevents collisions from producing a reaction, if...

I'm really unsure what the difference is. We're using these when calculating $K$ of combined reactions. In general, I am also confused what $K$ is in comparison to $K_\mathrm{a}$ and $K_\mathrm{b}$. For example here is a calculation where for the reaction involving $\ce{NO2-}$, the equilibrium co...

I posted a question under the "2019 Moderator Election Q&A - Question Collection" which was not that well received, apparently because it was not considered to address practical aspects of moderation. However, I posted the question because I believe I approach the topic of "question and answer qu...

This is a question from CAIE! I need to understand why the secondary amine in serotonin molecule doesnot undergo condensation reaction with $CH_3COCl$ ? because as far as I know, there should be an amide formation for this reaction. Here's a picture of Serotonin: I must be lacking some inf...

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