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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; ...
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0 votes
0 answers
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 ...
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-1 votes
0 answers
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?
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1 vote
0 answers
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)?
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-1 votes
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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 ...
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5 votes
2 answers
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?
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1 vote
1 answer
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 ...
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-3 votes
1 answer
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.
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-4 votes
0 answers
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?
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0 votes
0 answers
36 views

Why is AgOH brown when silver(I) ions are colorless?

As Wikipedia states, $\ce{Ag+}$ ions are colorless in solution: https://en.wikipedia.org/wiki/Color_of_chemicals Compounds that I know of containing $\ce{OH-}$ are also colorless or white (such as $\...
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-3 votes
0 answers
16 views

Making up a TE solution [closed]

You are required to make up the following TE solution: 10mM Tris, 2mM EDTA. Calculate the quantity of TRIS and EDTA that will be required to make up a 1 litre volume of this TE solution. Mole weights ...
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0 votes
1 answer
39 views

Why is diamond not the most dense substance?

Diamond is the hardest substance on earth which can be attributed to it's tightly-bonded crystal lattice. Hence, assuming there were a substance more dense than diamond, mustn't it be harder than ...
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-2 votes
0 answers
18 views

CAThode and ANode [closed]

Why did scientist use a perforated cathode when they discovered anode rays? And was there a hole in anode when scientists discovered cathode rays I mean when cathode rays were attracted towards anode, ...
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-1 votes
0 answers
45 views

Can you make alcohol from oxalic acid? [closed]

Can you make alcohol from oxalic acid? Since you can get aldehyde by reduction of carboxilic acid and can also get alcohol by reduction of aldehyde, I was wondering what's it like reducing oxalic acid ...
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0 answers
11 views

how to dissolve sodium silicate with acetone [duplicate]

I'm doing an experiment to dissolve sodium silicate with acetone to form liquid glass coating for ceramic tiles, first question is is it possible?, second question is if its possible what's the ...
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1 vote
1 answer
26 views

Why the electronic configuration of samarium is ending with 4f⁶6s²

What is coming in my mind is that 4f^7 6s^1 should be more stable as it allows two orbitals to be half filled rather than 4f^6 6s^2 in which only one orbital is completely filled....can someone please ...
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0 votes
1 answer
39 views

Differential equation in consecutive reactions

I'm blocked in a step of getting to the equation $(7)$, more precisely in the step between $(5)$ and $(6)$. I show my way to solve it down, but I don't get the same as $(6)$, so I wanted to know if I ...
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0 votes
1 answer
19 views

Gibbs Free Energy of Ideal Gas in Carnot Cycle

Let's just say we have 2 moles of monoatomic (maybe helium) ideal gas that is doing a Carnot Cycle with reservoir temperature of 300 and 750 K. Now, here's a simple question, what is the Gibb Free ...
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1 vote
0 answers
22 views

Dissolving Pyrite with HCl: Will dissolving KNO3 in HCl give it a similar oxidizing effect to HNO3?

I'm trying to dissolve small pyrite (FeS2) grains. It's supposed to be done in nitric acid, but my lab doesn't have any. It does have a lot of 37% HCl and various salt oxidizers, such as KNO3, KMnO4, ...
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-2 votes
0 answers
42 views

Hybridization of [CoF3(H2O)3]?

I encountered a question which asked how many electrons in t2g of [CoF3(H2O)3] . Now with ligands like H2O Complex of Co are low spin complexes or d2sp3 . So according to that t2g6 eg0 will be the ...
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1 vote
0 answers
4 views

How to restart an interrupted TS optimization job in Gaussian16 without the CalcFC option from the chk file? [migrated]

I have to do the TS optimization of a very large structure. Initially, I used the typical opt(ts,calcfc,noeigentest) at the route section, but during the ...
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0 votes
0 answers
13 views

Surface-Plasma Interaction Education Guidance

I work in a field where understanding interactions between plasmas and metals for the purpose of generating a particular reaction is important. However, I know very little about plasma assisted ...
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0 answers
36 views

Why is the pH of this ammonia solution more acidic than another ammonia solution?

I made two similar ammonia solutions in different ways, and they resulted in different pH, but i'm not sure why. Solution 1 Added 5.84 g NaCl to a 500 mL flask. Then added 10 mL 25% ammonia solution. ...
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0 answers
50 views

Which is more basic: (3Z)-penta-1,3-dien-3-amine or (2E)-penta-2,4-dien-1-amine?

Alright, I've been drawing resonance structures and comparing conjugate acids/bases for this one for like half an hour and I've gotten nowhere. Can anyone please explain which of these is more basic, ...
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0 answers
33 views

Mechanism for reaction of beta-ketoacid with AcONa, AcOH with heat

I am unsure of how to go about designing a mechanism for the following molecule's reaction with AcONa and AcOH with heat. I thought perhaps it may work as a cyclisation reaction, forming an ether; or ...
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2 votes
1 answer
82 views

Photoelectric effect: What happens when you irradiate the metal strip with a wave of frequency exactly equal to threshold frequency of the metal?

My teacher said that if we irradiate the metal strip (used in generating the photoelectric effect) with light having frequency equal to the metal's threshold frequency, then the electrons will have ...
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3 votes
1 answer
333 views

Is it possible to store a Tween 80 stock solution?

I am making a stock solution of Tween 80 (0.05 % w/v) and each experiment requires just 15 ml of the stock solution. Is it possible to make a large batch (about 100 ml) and store it somewhere? If so, ...
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0 votes
0 answers
39 views

Determining the order of reaction of HCl in the reaction between KMnO4 and HCl

I obtained the following rate-concentration graph for the reaction between hydrochloric acid and potassium permanganate. The x-axis is the concentration of hydrochloric acid (varying), while the y-...
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0 votes
0 answers
37 views

Is the chemistry behind the "Anoxic Filter" actually real? [Pond/Aquarium Denitrification]

In the Aquarium hobby, there are two methods to remove NO3 from your water: Plants Water changes There are a handful of people and companies that sell porous biological media that claims to create ...
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0 answers
28 views

Enthalpy of thermal decomposition of copper(II) carbonate and manganese(II) carbonate

I was wondering if anyone knows the theoretical or estimated value of the enthalpy of thermal decomposition of Copper(II) carbonate and Manganese(II) carbonate. Or if you know any methods to calculate ...
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6 votes
1 answer
61 views

Iodine clock reaction: lower temperature but faster result?

I was told by several high school students that they experienced odd results in their iodine clock reaction lab. They did several different trials, and the lower the temperature, the faster the blue ...
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  • 611
1 vote
1 answer
49 views

On the definition of Molar conductivity

The textbook I follow defines the conductivity, $\kappa$, as $$\text{Conductance} \ G=\frac{1}{R}=\kappa \frac Al$$ The inverse of resistivity, called conductivity, is represented by the symbol $\...
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0 answers
31 views

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 ...
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5 votes
1 answer
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 &...
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5 votes
2 answers
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 ...
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1 vote
0 answers
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 ...
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4 votes
2 answers
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
2 answers
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 ...
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6 votes
1 answer
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 ...
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0 votes
0 answers
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?...
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-2 votes
0 answers
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 ...
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0 votes
1 answer
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 ...
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0 votes
0 answers
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 ...
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-1 votes
0 answers
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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0 votes
0 answers
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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-5 votes
0 answers
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, ...
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-1 votes
0 answers
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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  • 181
-3 votes
0 answers
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 - $$V(r,\theta)=-\frac\alpha r+\frac{\beta\cos^2(\theta)}{r^2\sin^2(\theta)}$$ ...
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2 votes
1 answer
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 ...
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0 votes
0 answers
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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