Chemistry, D&D, Potassium, Symbionts and Adventure!

RUMBLETiGER

Adventurer
@Dandu , this specifically is a question for you, given your chemistry background, but anyone with knowledge can help me here.

I'm trying to develop an encounter for PC's where they can acquire a Psionic Sinew symbiont from the Fiend Folio. It's the creature on the arm in the following pic:
50182.jpg


And so, I'm designing an encounter based moderately loosely off of real world chemistry, justifying that the Psionic Sinew feeds of the Potassium in a creature's body.

First, some questions:

1. Does pure Potassium occur naturally in the world? If so, how? It's ok if it doesn't, since D&D is not reality, it simply would be helpful to know what and how that would be like before I make it up.

2. Would a long, narrow deposit of pure Potassium, lets say, a few miles long, trapped within solid stone for eons, than exposed by a fissure created by natural erosion/tectonic shifting/magic/whatever, in the midst of a few days worth of rainstorm... Result in earthquake-style eruptions of the land leading to shifts of cliffs, large ground fissures, underground caverns, etc. as the Potassium exploded? The result being uneaven massive chunks of ground, cliff faces, new subterranian environments, etc?

3. If a Wizard did it, could the remaining deposits of Potassium be sealed safely away by surrounding the mineral by Argon, than sealing that safe air off by a water barrier? Would a barrier of Stone-> Potassium-> Argon -> Water-> atmosphere... prevent the chain reaction of oxidizing or exploding of the Potassium, keeping it safely sealed but potentially active(not oxidized)? Would the Argon air eventually be contaminated by oxygen or water moisture from the water barrier or will it remain pure as an air pocket? My understanding is that since Argon is heavier than Oxygen, Oxygen might rise up through the Argon and contaminate the solid Potassium, but I don't know if Oxygen would enter this Argon pocket at all.

With that said, I need a chemists' understanding of the plausability of the following scinario:

A (Goblin) wizard mitigated the great cataclysm by sealing off the Potostone (Goblin phrase for Potassium, based off of the sound of the explosion when contact with water, translated into common) from the air by surrounding it with a different, deadly air (Argon), than trapping that pocket by a water barrier. When Goblinoid explorers searched the resulting caverns, they discovered Muscle Worms (Psionic Sinews) that fed off the Potostone. These Muscle Worms, now becoming inert and dying, were able to bond with the explorers, feeding off their bodies instead and providing the host with great power.

Forward and Era. The cavern is now a holy site as a rite of passage for Bugbear Warriors seeking to become members of the Elite, powered by the Muscle Worms. The origin and understanding of the tunnels has faded into mythology and obscurity.

A young Bugbear warrior is accompanied by two Elite, muscle wormed warriors on his pilgrimage to the holy caves. He enters the tunnel and travels till it forks. Ignoring the downward passage he instead travels a long, straight tunnel, a fissure in the stone, braving monstrous spiders, deadly fungus and other subterranian dangers. The tunnel ends in a slope that goes benieth water. The warrior has trained for this, and his escorts are ready to kill him should he make a misstep. Holding his breath, the young warrior goes under the water, traveling a short passage, emerging into the deadly, unbreatable air on the other side. The young warrior and the Elites must continue to hold thier breath while the young warrior drys himself off, retrieves a container, drys that as well, breaks the seal, carefully and dryly chips off a small portion of Potostone, places it into the container, reseals it, than returns into the water to emerge, gasping for breath, back the way he came. The Elites must be willing to kill the young warrior should it seem he'd expose the Potostone to even the slightest drop of water or his own held breath, as tradition dictates, for fear of great calamity.

Returning to the fork, the warriors go down the other tunnel and arrive at a large, underground pool. The young warrior then retrieves his Potostone and drops it onto the surface of the water. Inert, hibernating Muscle Worms live on the bottom of the pool. The Potostone dances upon the water's surface and the brave young warrior thrusts his arm into the pool, trying to keep away from the dangerous Potostone, knowing should it land uon his fur he'd be destroyed. If he is fortunate, a Muscle Worm, drawn to the Potostone, will emerge and bond with him.

The warriors then pay tribute by dumping figs, apricots, bananas and other fruits into the pool, as tradition demands and the now awakened Muscie Worms feed, breed and live until then food is gone and they await the next pilgrimage in hibernation.

my PC's are going to somehow stumble upon this ritual, interact with the Bugbears and best case scinario, gain Psionic Sinews, worst case scinaro, cause an explosion that will alter the landscape for miles and likey crush them to death.

And so I ask you Chemists, would the following situation work by reasonable approximation to reality? If not, could slight modifications be made so that it would work by reasonable approximation to reality?

if not I'll handwave reality and do it like this anyway, but I'm really hoping this concept is solid.
 
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Elemental- which is to say pure- potassium does not really appear in nature. (Few things do.) It's extremely reactive with water and oxidizes rapidly in air.

So to find potassium, you're going to have to find ertain rocks:

Orthoclase (potassium feldspar) is a common rock-forming mineral. Granite for example contains 5% potassium which is well above the average in the Earth's crust. Sylvite (KCl), carnallite (KCl·MgCl2·6(H2O)), kainite (MgSO4·KCl·3H2O) and langbeinite (MgSO4·K2SO4)) are the minerals found in large evaporite deposits worldwide. The deposits often show layers starting with the least soluble at the bottom and the most soluble on top.[26] Deposits of niter (potassium nitrate) are formed by decomposition of organic material in contact with atmosphere, mostly in caves; because of the good water solubility of niter the formation of larger deposits requires special environmental conditions.[27]
and
Potassium reacts very violently with water producing potassium hydroxide (KOH) and hydrogen gas.
2 K (s) + 2 H2O (l) → 2 KOH (aq) + H2↑ (g)
This reaction is exothermic and releases enough heat to ignite the resulting hydrogen. It in turn may explode in the presence of oxygen.

Potassium - Wikipedia, the free encyclopedia


So in your scenario, something resembling pure K exposed in a rainstorm could create some NASTY explosions.
 
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1. Does pure Potassium occur naturally in the world? If so, how? It's ok if it doesn't, since D&D is not reality, it simply would be helpful to know what and how that would be like before I make it up.
Banananananananananana

Potassium occurs in various mineral deposites in the real world. Usually as a compound, which is why you don't see rocks exploding when it rains.

2. Would a long, narrow deposit of pure Potassium, lets say, a few miles long, trapped within solid stone for eons, than exposed by a fissure created by natural erosion/tectonic shifting/magic/whatever, in the midst of a few days worth of rainstorm... Result in earthquake-style eruptions of the land leading to shifts of cliffs, large ground fissures, underground caverns, etc. as the Potassium exploded? The result being uneaven massive chunks of ground, cliff faces, new subterranian environments, etc?
You wouldn't create underground caverns so much as collapse them. The size of the explosion would depend on many factors such as the amount of water and the potassium involved.
I believe the reaction of 2 moles of potassium and water [2K (s) + 2H2O (l) -> 2KOH (aq) + H2 (g)] results in 196 kilojoules of energy being released. The hydrogen then reacts with atmospheric oxygen [2 H2(g) + O2(g) → 2 H2O(l)] which results in 586 kilojoules. Overall, let's say the reaction produces 782 kilojoules for 2 moles of potassium. 391 kJ/mol, then. One mole of potassium weighs 39.1 grams. [391 kJ/mol]/[39.1 grams/mole] equals 10 kJ/gram.
One kilogram therefore contains 10000 kJ/kg, or 0.01 megajoules per kilogram.

Compare with Trinitrotoluene (TNT) which has 4.184 megajoules per kilogram.

Keep in mind that, unlike TNT, only surface the surface potassium would react. The potassium located deeper down likely will not, so you're not going to have a huge explosion all at once.
3. If a Wizard did it, could the remaining deposits of Potassium be sealed safely away by surrounding the mineral by Argon, than sealing that safe air off by a water barrier? Would a barrier of Stone-> Potassium-> Argon -> Water-> atmosphere... prevent the chain reaction of oxidizing or exploding of the Potassium, keeping it safely sealed but potentially active(not oxidized)? Would the Argon air eventually be contaminated by oxygen or water moisture from the water barrier or will it remain pure as an air pocket? My understanding is that since Argon is heavier than Oxygen, Oxygen might rise up through the Argon and contaminate the solid Potassium, but I don't know if Oxygen would enter this Argon pocket at all.
I'm not entirely sure what you're proposing here. At any rate, stone would create a barrier, but keep in mind stone can be porous.

You don't really need to worry about sealing it off from oxygen though. Removing water from the equation should be enough.
 
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And so, I'm designing an encounter based moderately loosely off of real world chemistry, justifying that the Psionic Sinew feeds of the Potassium in a creature's body.
I'll address the basic premise here. Metallic potassium is very unstable and reacts violently with water as well as air to form some sort of ionic compound (a salt). This salt, conversely, is very stable, and while it is subject to being dissolved in water, will not participate in many chemical reactions in an Earthlike environment. The potassium in a living creature is in the latter form (a dissolved salt). Its role in biology is mainly in regulating the electrical potential of a cell. A psionic sinew, if a living creature, would consume and use potassium, but its energy would come from fat, carbohydrates, and proteins like everyone else.

But since we're talking fantasy, it's worth noting that the role of potassium in neurons is to normalize a cell after an action potential. You could maybe say that the vigor ability has something to do with your cells being aggressively normalized after injury to justify an increased need for (ionic) potassium; or say something similar for inertial armor.

***

OTOH, if you want to say that the scenario of a breeding pool using metallic potassium is developmentally important, okay. Just make the pool something other than water (for reasons described above). Just use some sort of organic liquid, or a fantasy material, or have the thing take place on the Astral Plane where there's no air. I suppose some fantastical creature could slowly metabolize metallic potassium, which would provide an awful lot of energy for growth. And maybe after getting acclimatized to the ionic potassium byproduct of such a reaction, they would be drawn to the salty touch of a humanoid.

***

Of course, as long as you don't call it "potassium", your players won't know or care.

my PC's are going to somehow stumble upon this ritual, interact with the Bugbears and best case scinario, gain Psionic Sinews, worst case scinaro, cause an explosion that will alter the landscape for miles and likey crush them to death.
As exergonic as the oxidation of potassium is, I think you've rather overstated the case. When dropped it water, it fizzles but it's not a huge explosion. Also, skin and hair would be much less reactive with the metal than air and water would.
[ame=http://www.youtube.com/watch?v=N2451rpcKuc]Potassium Metal Reaction - YouTube[/ame]That being said, there's nothing wrong with dramatic license.
 
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Thank you all very much for the input!

Is there another element or compound that would be more reactive in water than Potassium?

Because it's a fantasy world, I will have the existence of pure Potassium. I'll handwave how it came to exist, formed as deposits within existing stone.

It's very helpful with what you've all taught me. First off, instead of Earthquake-style eruptions, I'll have the deposits of Potostone, having dissolved, collapse the land. Exposed cliff faces would result not from the earth erupting upward, but from sections of land collapsing downward. The resulting caves will be from cracks and empty spaces. Since many, many years have passed, erosion and other natural processes have expanded upon the caves.

Since the surface Potassium would react, days worth of rain dissolving the Potostone would cause collapsing, fractured cavern pockets underground, hydrogen buildups that explode, stress fractures across miles of landscape, etc.

I'll see that the surrounding stone is non-porous. I want to seal the raining Potostone from oxygen, because I do not want it to Oxidize and become an inert salt. I want it to remain potentially active and still dangerous. Another question, if pure Potassium would Oxidize, how deep would that Oxidation go? Could someone chip through an inch to get to the untouched stuff? Six Inches? Three feet?

As an Aberration, which by definition are creatures that are aberrant/different/alien, I can handwave nearly anything about things like nutritional details. I do, however, really like the Potassium/Vigor&Inertial Armor connection, and will use that! The Psionic Sinews actually metabolize the salt, not the pure Potassium, and so it's the Potassium Peroxide and Potassium Hydroxide that it considers food. They get nutrition from the Potassium compounds within the fruits as well, but not as intensely as the substance more directly from the metal/salt, and so this is why the Psionic Sinews have done from active, underground dwelling creatures to mostly hibernating at the bottom of a pool.

As for the Potostone dancing on top of the water, possibly catching in the fur, I'll change the concept from "Destroyed" to "Seriously Burned" if it catches in the Bugbear's fur.

The reality is, within the Argon cavern where the remaining pure Potassium resides, getting some drops of water on the Potostone would not lead to cataclysmic destruction, but since the knowledge has faded into mythology, the Elites will still take deadly caution to see the Potostone stays dry, by even a drop.

Thanks all! While I appreciate the Fantasy that is D&D, it's important that things make some sort of sense, at least when I'm sandboxing things, as per my own standards. Potostone will ultimately be a fictional, fantasy material, but I want some real world support for it's existance and actions. I appreciate all the input!
 

Is there another element or compound that would be more reactive in water than Potassium?
As you go straight downwards on the periodic table, the elements will become less stable (bigger atoms have electrons that are progressively farther from the nucleus, which makes them prone to react with other atoms). Thus, Rubidium, Cesium, and Francium behave similarly in water, and are progressively more reactive. It does get to the point where there are serious concerns about explosions when they are handled in metallic form; one of my chemistry professors had some anecdotes about concerns surrounding people doing research (I think it was with Cesium metal) that begin to approach the explosions you were describing.. Obviously, these are progressively rarer in nature, but that's all handwaveable. None of them has much of a role (if any) in human biochemistry but psionic sinews may be different.
[ame=http://www.youtube.com/watch?v=uixxJtJPVXk]Alkali metals in water, accurate! - YouTube[/ame]

Happy gaming...
 

As you go straight downwards on the periodic table, the elements will become less stable (bigger atoms have electrons that are progressively farther from the nucleus, which makes them prone to react with other atoms). Thus, Rubidium, Cesium, and Francium behave similarly in water, and are progressively more reactive. It does get to the point where there are serious concerns about explosions when they are handled in metallic form; one of my chemistry professors had some anecdotes about concerns surrounding people doing research (I think it was with Cesium metal) that begin to approach the explosions you were describing.. Obviously, these are progressively rarer in nature, but that's all handwaveable. None of them has much of a role (if any) in human biochemistry but psionic sinews may be different.
Alkali metals in water, accurate! - YouTube

Happy gaming...
Now THAT's what I'm talking about!
I think I may go with Rubidium. Since Potassuim would be accounted for in a host body as well as as a metal, the Psionic Sinew can also live comfortably off of Potassium, but be dependant upon constant feeding from the host. Cesium is more what I was imagining when I first thought of this, but Rubidium should do the trick.

Potostone will be my variation of these substances. Good times.

Thanks all!
 
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After seeing that video Ahnehnois posted, I want to make some steampunkish hero who uses self-propelled water skis that are powered by alkali metals like cesium... Just add water! ;)

Plus this:

[ame=http://www.youtube.com/watch?v=vehIB2fhpVk&feature=youtube_gdata_player]Thomas Dolby - She Blinded Me With Science (2009 Digital....flv - YouTube[/ame]
 



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