Questions tagged [absorption]
In chemistry, absorption is a physical or chemical phenomenon or a process in which atoms, molecules or ions enter some bulk phase – gas, liquid or solid material.
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If polyethylene glycol (PEG) is hygroscopic, how does it protect wood?
Archaeologists and conservators use polyethylene glycol (PEG) to replace water inside wood to protect it from shrinking and expanding with changes in humidity. But it is hygroscopic—even more so than ...
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Rate equation for a reaction involving a polymer having absorbed small proteins according to langmuir's model
First, let me apologize for the awful question title..
I have a solution with polymers with $N$ binding sites and small proteins, which can attach to a binding site. The polymers will absorb the ...
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Would adding water to a fish tank with sand lower the level of sand?
Let's say I have a typical 10 gallon tank with dimensions 10" x 20" x 12", and it's filled halfway (5" in height) with dry sand for hermit crabs.
If I fill the tank up with water, will the level of ...
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What fraction of the vapour in electronic cigarettes is water?
Not a chemist but looking for an answer I can understand.
Electronic cigarettes use propylene glycol and/or vegetable glycerin as a base liquid. This is heated and vaporized at a low temperature (my ...
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Look for superabsorbent balls whose expansion is reversible
I am glad to find very cheap superabsorbent balls (see image below). However, I found their expansion is not reversible. The wiki entry 'Superabsorbent polymer' also says that the material will '...
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Using table salt as a way to limit humidity in an unoccupied house
We own a static caravan in the UK (Snowdonia region, so rainy and wet all year round, moderately cold winters) and we leave it unoccupied during Winter (Oct-Feb).
We were advised of an apparently ...
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Lipinski's Rule of 5 Oxygen Rules
I would like clarification on the role of oxygen as a hydrogen bond acceptor in Lipinski's Rule of 5 (for drug absorption). I have learned in my medicinal chemistry class that both electron pairs from ...
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What does activated carbon do to gasoline vapor?
What does activated carbon do to gasoline vapor? After the vapor is absorbed into a charcoal EVAP canister, what is left to be sent to the engine?
My question is in reference to the work of Tom Ogle ...
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Absorption and ionization of rare earth ions
I'm studying silicate photosensitive glasses that contain $\ce{Ce}$ ions, and such glasses have an absorption band at 305 nm due to $\ce{Ce^3+}$. After that, the $\ce{Ce^3+}$ ion becomes $\ce{Ce^4+}$, ...
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Is UV-Vis absorption polarization dependent ? Why?
Consider molecule of interest be dissolved in a solvent (and this molecule has absorption in the visible region). We are using a broadband visible light source say tungsten lamp. This light passed ...
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Resonance condition for absorption of energy
In NMR, for example, why it is not possible to excite nuclei from one spin state to another using energy of arbitrary frequency?
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Improving efficiency of absorption refrigerator (ammonia+hydrogen)
Apologies if this is not the right forum for this question, I checked the Physics side and there's no questions on this, whereas there's at least one other question here about absorption refrigeration....
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Sulfur atomic absorption
Would the atomic absorption from FAA for Sulfur be from 3s2 -> 3p4 or 3p4 -> 4s0?
I think according to the electronic partition function, there would be zero electrons in the 4s0 state at the ...
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What is the reason for the blue color of an ammoniated electron?
I am quoting a line from a book regarding reactivity of alkali metals with liquid ammonia.
The blue colour of the solution is due to the ammoniated electron which absorbs energy in the visible region ...
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Is there a way to liquefy a super absorbent polymer without using salt?
I understand that once a SAP absorbs a liquid it becomes a type of gel and that this gel can be liquefied by applying salt, are there other methods to liquefy this gel without using salt?
