You get carbonic acid when carbonating water and some people like that taste, for some reason 🤷♂️
It’s crazy tho how I was thinking similarly after posting the previous comment. If cabonated water gets the bitterness from carbonic acid, what would hydrogenated or nitrogenated water taste like? I’ve had Guiness and Pepsi Nitro. Both are made bubbly with nitrogen. And while the beer is good, the Pepsi just tasted like normal Pepsi, but like you had left it unsealed overnight.
Never had anything that was artificially hydrogenated, though. 🤔
Carbonic acid is a weak acid, so the acidity isn’t as strong. Most the protons are bound in carbonic acid. Whereas in dissolved hydrogen, all the hydrogen molecules are necessarily ionized, giving what should be an acid quite some orders stronger.
Turns out solubility of hydrogen is quite low (to be expected) so it’s unlikely enough hydrogen would dissolve to burn a hole in a tongue. You’d really have to want to do it, in which case there are easier ways to do so than pressurised supercritical hydrogen.
No, hydrogen (gas) doesn’t spontaneously dissociate into H+ when dissolved in water because it’s covalently bonded; it remains H2, just like nitrogen remains N2 when dissolved in water. Acidity is a measure of the concentration* of H+, so dissolving H2 doesn’t impact the acidity.
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.
Dissolved hydrogen is effectively acidifying it, no? That would be chugging fizzing acid. Must’ve been fun.
You get carbonic acid when carbonating water and some people like that taste, for some reason 🤷♂️
It’s crazy tho how I was thinking similarly after posting the previous comment. If cabonated water gets the bitterness from carbonic acid, what would hydrogenated or nitrogenated water taste like? I’ve had Guiness and Pepsi Nitro. Both are made bubbly with nitrogen. And while the beer is good, the Pepsi just tasted like normal Pepsi, but like you had left it unsealed overnight.
Never had anything that was artificially hydrogenated, though. 🤔
Carbonic acid is a weak acid, so the acidity isn’t as strong. Most the protons are bound in carbonic acid. Whereas in dissolved hydrogen, all the hydrogen molecules are necessarily ionized, giving what should be an acid quite some orders stronger.
Most soda has a pH of like 3, so probably can’t be muchh worse.
Turns out solubility of hydrogen is quite low (to be expected) so it’s unlikely enough hydrogen would dissolve to burn a hole in a tongue. You’d really have to want to do it, in which case there are easier ways to do so than pressurised supercritical hydrogen.
No, hydrogen (gas) doesn’t spontaneously dissociate into H+ when dissolved in water because it’s covalently bonded; it remains H2, just like nitrogen remains N2 when dissolved in water. Acidity is a measure of the concentration* of H+, so dissolving H2 doesn’t impact the acidity.
*actually the activity
Thanks, I never understood - what’s the practical difference between pH and activity?
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.
How do we then calculate the activity of concentrated or non-ideal systems?