“The solution was stirred overnight.” — Why?
If you have a reaction going at a fixed temperature (especially room temperature), nothing remains to be added and all reagents and products are either dissolved or soluble, then what is the point of stirring?
This is not a rhetorical question. I really want to know the answer! Dispersions,1 suspensions,2 emulsions,3 partly dissolved starting materials, precipitating products and heterogeneous catalysts – I can understand why these need stirring. But true solutions?
Does not the Brownian motion of particles ensure a perfect mixture, especially in the absence of a temperature gradient, regardless?
I do stir all room temperature reactions, even if everything appears dissolved. Bad habit? Enlighten me, please. (By the way, did you know that Albert Einstein solved the tea leaf paradox in 1926?)
1,2,3 I will probably never learn the difference between these.