# All Questions

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### Can you put an equation in your aim?

I am writing my report, and I am not sure what to do for my aim. I have 2 options; To determine if increasing the concentration of HCl accelerates the rate at which CO2 is released in the reaction; ...
8 views

### Do disulfide bonds determine the 3-dimensional structure of a protein? or do they just stabilise the 3D structure?

I was wondering if disulfide bonds actually determine the 3D shape of a protein, as I noticed that most disulfide bonds occur when two cysteine side chains exist in close proximity to each other. So ...
• 65
9 views

### O2(aqueous) + H+ =?

So just like the title. I've got dissolved oxygen O2, and I've got a free hydrogen H+ after cracking H2O into hydrogen and a hydroxyl radical. While O2 has its bond energy, after meeting H+ we get?
1 vote
11 views

### Does the Darzens reaction work with an alpha-chlorocarboxylic acid and an aldehyde?

Is it possible that a reaction of an alpha-chlorocarboxylic acid with an aldehyde work for the Darzens reaction to produce an epoxide (with NaOH as the base, and H3O+ workup)?
• 11
15 views

### Quantum mechanical model

How do we know that in the same shell which subshell (s,p,d,f) is near to nucleus? Actually, my question was that an electron in an orbital of higher angular momentum stays away from the nucleus than ...
43 views

### Do chemical bonds impact half-life of elements?

Let’s say we have element X with half life of 100 years. Can chemical bonds like X−X or X−Cl increase/decrease half-life of X? As a follow up question, can it increase/decrease radioactivity of X?
1 vote
75 views

### Can the relative velocity of two colliding molecules be too large to allow reaction to occur?

In a collision between two molecules, can the relative velocity of one with respect to the other be too large for a reaction to occur? For example, suppose that two molecules collide with (a) a ...
• 115
25 views

### Is sucrose soluble in water? [closed]

Is sucrose soluble in water? If not, then why not? If yes ,than why it's yes? Please explain it to me. Thanks in advance.
14 views

### Which acid will titrate first in a mixture of acids [closed]

In a mixture of acids containing a weak acid and strong acid which will react first with a strong base?
36 views

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### Conceptual doubt regarding electrolytic cells involving acids

Consider the following cell Ag(s) | AgIO3(s) | Ag+ (x M), HIO3 (1 M) || $Zn^{2+}$ (1 M) | Zn(s) My doubt is not regarding the full calculation of the EMF , but the meaning of ' 1 M HIO3 '. What I mean ...
365 views

### Is the 'i' prefix for "iso-" italicised?

I want to abbreviate pseudoisocytosine. Should it be "ΨiC" or "ΨiC"? I would usually write "sec-butyl", "tert-butyl", etc, and using "t-BuOH" for &...
573 views

### Mechanism of the blue bottle experiment

I have researched multiple mechanisms for this experiment yet all of them suggest different versions or are too vague. None of them are consistent since the final overall equation seems to be missing ...
1 vote
80 views

### How would you remove sulfur hexafluoride from a gas sample?

What procedures would be available to remove SF6 from a sample (or stream) of gas? The ideal answer would be a list of options. If it helps, please assume the rest of the sample consists of noble ...
80 views

### Why do we call salts such as AgCl sparingly soluble?

Though we use the term practically insoluble for salts like $\ce{AgCl}$ in inorganic chemistry, we preferably call them "sparingly" soluble salts in physical chemistry seeing their tiny ...
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1 vote
34 views

### How to remember what measure of concentration to use for colligative properties

Like the title says, how do I remember what measure of concentration(molality, molarity, mole fraction) to use for various colligative properties such as increase in boiling point when a non-volatile ...
141 views

### Lithium hydride from lithium fluoride

There is a method of preparation of LiH by reacting a lithium halide (chloride, bromide, or iodide) with sodium hydride in an inert organic diluent such as tetrahydrofuran. Is it possible to replace a ...
30 views

### How is it possible that some celestial bodies have icy surfaces when water boils off at any temperature in absolute vacuum?

Why doesn't the ice on comets or on the moon Enceladus sublime? Enceladus doesn't have an atmosphere, so what is it that prevents Enceladus' water ice surface from becoming a gas? Did I miss something?...
54 views

### Could reaction-diffusion processes on the subquantum level lead to an accurate description of the phenomena that quantum mechanics deals with?

Could reaction-diffusion processes taking place at the subquantum level lead to an accurate description of the phenomena that quantum mechanics deals with? I.e. Can physical fields be explained by ...
47 views

### Where does the exchange energy released in an exchange interaction come from?

Two electrons in different orbitals can exchange with each other and if this happens they release a certain amount of exchange energy. But where does this energy come from? And wouldn't the atom ...
• 305
20 views

### Literature values for the molar absorptivity of Methylene Blue

I am having trouble finding literature values for the molar absorptivity of MB dye from a scientific journal, preferably one that is recent. I am also having trouble finding an explanation for why MB ...
27 views

### Objective for producing ethanol from brown algae "Chaetoceros calcitrans" using acid hydrolysis [closed]

Can you please help me think about a good objective on our research with regards to producing ethanol from brown algae "Chaetoceros calcitrans" using acid hydrolysis. The measurement of ...
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30 views

### How much "free ammonium" would be present in a solution of ammonium and citric acid?

I am making a mixture. I start with aqueous ammonia (aka ammonium hydroxide) that is 10% NH3 by weight (roughly 8.2% N by weight). I add 50 grams of citric acid (dry powder, 100% purity) to 1 L of the ...
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21 views

### Are there things with different physical attributes that serve exact same purpose in a system? [closed]

I’ve been puzzling about this cross-disciplinary concept for the last week. Can you think of any two things that have different physical make up that serve the exact same purpose? For instance, ...
56 views

### How to degrease a bird? [closed]

I found a pigeon which is a victim of some automotive grease. The legs and wings were quite covered with it. I used paper towels to remove as much as possible (gently) however, there is a limit to the ...
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79 views

### How can I find out the name of the chemical compound for these potentials? [closed]

These potentials are for chemical molecules, how do I know the chemical compound of these potentials? - I am a physicist - $$V(r,\theta)=-\frac\alpha r+\frac{\beta\cos^2(\theta)}{r^2\sin^2(\theta)}$$ ...
90 views

### Could fluorinated gases be removed from the atmosphere? [closed]

Background Among all the discussion of 'greenhouse gas removal' (GGR) to aid climate change mitigation, almost all is concerned with removal of carbon dioxide. There are one or two mentions of ...
36 views

### Why do alkali metals form coordination compounds like transition metals? [duplicate]

I've recently read that there are a type of cyclic ethers called "crown ethers" than can coordiate certain cations like potassium and sodium. How is this possible if they have no d-orbitals (...

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