"I'm whatever you aren't, you fucker" - water, to the substance you mixed with it.
this post was submitted on 28 Apr 2025
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What is the PH of the water? π€
About 7. Fun fact i did not know before research, at 100 C waters pH can go as low as 6.14.
Oh! So that's why hot water burns you!
I know it's a joke and all, but it's not just the pH that makes something burn. A regular coke has a pH of around 2.5, for example.
Oh yeah? Then explain the sensation my sphincter feels upon butt-chugging three cans of coke, smart guy?
Little bits of it oscillate between hydronium and hydroxide so a little of both but not enough to make a difference.
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 BrΓΈnsted-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
Water is so cool. I like how the hydrophobic effects drives protein folding
Considering that water autoionizes, yes - it is both an acid and a base.
Inclusive or
Do you mean dihydrogen monoxide?
Pretty sure the OP meant hydrogen hydroxide.
also known as hydric acid
Close, the standard IUPAC acid nomenclature would be "hydrohydroxic acid"
Yes
Ah yes amphoteric compounds
It is the final frontier for either, your meme could have been so much more interesting. SAD.
Is this about the anomaly of water? I vaguely remember it from school
No, this is about water being amphoteric compound meaning it behaves like a acid or base in different circumstances.
The water molecule is amphoteric in aqueous solution
A water molecule in aqueous solution. How can you tell it's being dissolved, or doing the dissolving?
In high school I was told that one in avagadros number of water molecules splits into ions.
Is that right? It seems like a very small amount.
The dissociation constant of pure water at RT is 1x10^-14. This is many magnitudes more than just one per avogadros number. The "trick" is that any given molecule of water basically has that 1x10^-14 chance of being split or otherwise whole at any given time.
Isn't water itself the pretty literal definition of 0 and it doesn't become one or the other until it's a solution with something else?
Water is the definition of 7.
Right, whatever the midpoint was. It's been a minute since my last chemistry class.
Also Iβm pretty sure itβs only coincidentally 7. The calculation for pH isnβt based on any property of water.
Well, yes and no. The pH scale follows the hydrogen ion concentration, but specifically in aqueous media. The reason 7 is in the "middle" of the scale is because the natural dissociation of water sits at equilibrium at 10^-7 M H+ at 298K, IIRC. So perturbations naturally just displace that specific equilibrium, so it absolutely is normative to water.
Interestingly enough, in other solvents a neutral pH is going to be a different value. IIRC, ammonia has an autoionization constant of 10^-30, so a neutral pH would be 15
By that definition, it canβt be exactly 7 then either. 10^-7 is just an estimate that weβve agreed works fine. To my knowledge we havenβt really tried to improve this accuracy either?
The exact value varies with temperature, so it's a "good enough for the typical variations in temperature experienced by most aqueous solutions" estimate.
But is it +0 or -0? Neutral 0 is a lie, a measurement precision error.