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spacemonkey1990 commented on a post in r/chemhelp
spacemonkey1990 1 point

Wouldn't it be like a factor of two? Since KP= (theta)/(1-theta) Then the dissociation process needs two surface sites so in a pure system then KP/2 = (theta)/(1-theta). Plugging that into the competitive adsorption isotherm then the denominator would be something like 1 +KP(a) + (KP(b)/2)

If it's not like that then doesn't it depend on the value of K? So I don't think it would be as simple as square the KP(b). Like what if the dissociation reagent binds suuuupper slowly (the equilibrium constant is less than that of the adsorbant you want), so even though it takes up two surface sites it might be negligible compared to the actual adsorbant you want.

In general poisons have really high K values so then I don't think it would be just square the dissociation reagent terms, but it would depend on the value of K.

Dunno if that helps but the TL;DR is that I don't think it's just square root, but it depends on the value of K more than anything.

Edit: formatting and added stuff

hmspain 1 point

The other one is due to a structure called kimberlites and they are famously rich in diamond. Kimberlites are reasonably rare and South Africa happens to have them.

Would it be logical to find similar structures in South America?

spacemonkey1990 1 point

Kimberlite can be found anywhere that has old rocks (archean?) that support the formation of diamond, I don't think South America has the right conditions to produce Kimberlite. South America has been known mostly for the mining of gold, emerald and silver.

spacemonkey1990 commented on a post in r/chemhelp
spacemonkey1990 2 points

Is the chloroform organic or aqueous? In a liquid-liquid extraction, what are you trying to do? What's the point of having the two liquids in the first place? Remember that like dissolves like; the example you provided is good, the phenols will be carried with the organic layer because they are organic. But why do you care about stuff getting carried into the organic layer?

Amines are organic or aqueous? Based on that where could try end up?

Acids are organic or aqueous? I which layer will they be based on that?

spacemonkey1990 commented on a post in r/chemhelp
spacemonkey1990 1 point

Try putting the units into the equation, remember that absorbance is a unit-less quantity.

Edit: spelling and check your math it looks like your friend punched the wrong stuff into the calculator, but at least the equation/numbers are right

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