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Cake day: July 1st, 2025

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  • pH is the negative of the (base 10) logarithm of the activity of H+: pH = -log10(aH+)

    If you mean “what’s the difference between concentration and activity,” activity is the “effective concentration” of a species. For ideal solutions, activity is equal to concentration. For real solutions, interactions between the components in the solution may cause a species to “act” like it is more or less concentrated.

    Dilute solutions at standard conditions are close to ideal: activity is about equal to concentration. But consider a concentrated solution of a salt: the activity will tend to be lower than the concentration because the cations and anions are not completely independent as in an ideal solution, but tend to “shield” each other due to electrostatic forces.



  • antler@feddit.onlinetoLemmy Shitpost@lemmy.worldOP cleans his fridge
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    5 days ago

    Please put an NSFW tag on this. I was on the train and when I saw this I had to start furiously masturbating vomiting. Everyone else gave me strange looks and were saying things like “what the fuck” and “call the police an ambulance”. I dropped my phone and everyone around me saw this image. Now there is a whole train of men masturbating vomiting together at this one image. This is all your fault, you could have prevented this if you had just tagged this post NSFW.