• 2 Posts
  • 502 Comments
Joined 2 年前
cake
Cake day: 2023年7月4日

help-circle


  • Autoionization and the reverse reaction are constantly happening in water, and when the reaction is happening at the same rate forward and backward the system is said to be “at dynamic equilibrium” (aka, stuff is happening, but there’s no net change)

    In pure water, the equilibrium concentration of hydronium and hydroxide are equal, so it’s said to be neutral. At room temperature, that equilibrium concentration is approximately 1*10^-7 moles per liter, which gives a pH of 7 (since pH is defined as the negative log _10 of hydronium concentration)



  • That’s why the meme works. It’s not because water autoionizes; it’s because water is amphoteric, meaning it can act as either a Brønsted-Lowry acid or BL base depending on what what it’s reacting with. Put water with ammonia, and water acts as an acid. Put water with acetic acid, and it acts as a base

    Source: I teach college chemistry







  • Mörk Borg? Other Fria Liga? Other Borg-likes? Other Kickstarter games? Is that just me?

    Don’t get me wrong, I love PF2 and I mostly actually play 5E with my friends on zoom (that bunch of Philistines), but I can’t be the only one obsessively finding niche games online like Into the Odd and Forbidden Lands and Frontier Scum and Inevitable and porting them into system-agnostic hex-flowers that could support Dark-Tower-esque realm crawling and West March-ish living worlds that I can never find anyone that wants to play and…

    Do I have a problem? Am I out of touch? No, it’s the D&D players that are wrong


  • I don’t even ever get the physical withdrawals or any noticeable effects, regardless of how often I do or don’t drink it. So, since my partner really does need the coffee first thing in the morning and I’m making it anyway, I usually have a cup because I like the taste and ritual. But when she’s out of town or getting coffee elsewhere, I hardly ever have any caffeine.

    The exception is when I was taking Adderall every day, I really did feel some effects from the caffeine, mostly potentiating the amphetamine. I do miss that aspect of being medicated