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Why chlorine acts as a strong field ligand in tetrachloridoplatinate(II)?

In most of the cases I have learnted, halogens act as a weak field ligand. However, I recently learned somewhere on the web that the strength of a ligand also depends upon the size of the atom. A ...
MrObjectOriented's user avatar
1 vote
2 answers
34k views

Is ethanol an acid or a base or amphoteric?

Is ethanol considered to be an acid or a base? Or does it act as an amphoteric species? Is acidity and basicity a relative concept? Also, can someone please explain this on the basis of the Brønsted–...
Anshul Gupta's user avatar
1 vote
1 answer
2k views

How is the acidic dissociation of acetic acid thermodynamically feasible?

For a reaction between an acid and a base $$\ce{A1 + B1 <=> A2 + B2}$$ to be spontaneous $\ce{A1}$ must be a stronger acid than $\ce{A2}$. With this in mind, how can this reaction be ...
Azulene's user avatar
  • 65
0 votes
1 answer
2k views

Dielectric constant and dissolution of ionic salts

We say that salts like $\ce{NaCl}$ get easily dissolved in water because the dielectric constant of water is very high. I know the dielectric constant of water is 81 and if a salt is put into water ...
Sagar's user avatar
  • 9
6 votes
2 answers
325 views

Have the STRUCTURES of synthesized anthropomorphic molecules (nanoputians) been verified experimentally?

Have the molecular structures of any synthesized anthropomorphic molecules (nanoputians) been verified experimentally? This is a different question than this question as I am asking here about the ...
uhoh's user avatar
  • 5,788
13 votes
2 answers
8k views

How do I compare the C=C bond lengths in this cumulene?

How do I arrange these chemical bonds in an increasing/decreasing order based upon their lengths? I understand that the bond (a) will be longer than (b) because (a) is a bond between sp² hybrid and ...
ExistentialNihilist's user avatar
9 votes
3 answers
4k views

Dipole moment and polarity of borazine / borazole / inorganic benzene

What is the dipole moment of borazine? I tried googling it but can't find a reliable source. I searched in JD Lee too. It might have it but I could not find.
Avi khare's user avatar
  • 199
13 votes
1 answer
535 views

Is it possible to make an anticatalyst?

I'm wondering if it is possible, theoretically, to create compounds which perform the opposite function of a catalyst (thus an anticatalyst). That is to say, could a compound be made which raises the ...
Tyberius's user avatar
  • 11.7k
3 votes
1 answer
225 views

Photoelectric effect and kinetic energy

According to my textbook, electrons which are emitted due to the photoelectric effect have kinetic energy given by: $$KE_{electron}=h\nu-h\nu_0$$ Where $\nu_0$ is the activation frequency of the metal....
Ramoose's user avatar
  • 31
3 votes
0 answers
2k views

Electron configuration from vanadium to chromium? [duplicate]

The electron configurations for vanadium is: $\ce{1s^2 2s^2 2p^2 3s^2 3p^6 3d^3 4s^2}$, and the electron configuration for chromium is: $\ce{1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^1}$. In looking at the ...
Cyclopropane's user avatar
  • 2,069
1 vote
1 answer
3k views

What is pure water

Can someone please explain to me what does "pure" water mean? The definition vary so much everywhere I look. But I just want to see it from a chemistry/scientific perspective.
thuang's user avatar
  • 21
3 votes
1 answer
5k views

Stability of diboron(B2) and dilithium(Li2)

Why is $\ce{B2}$ more stable than $\ce{Li2}$? Both $\ce{B2}$ and $\ce{Li2}$ have bond order equal to 1. Moreover, $\ce{Li2}$ has only 2 electrons in the antibonding molecular orbital while $\ce{B2}$ ...
Prashant Kumar's user avatar
1 vote
1 answer
211 views

At home Rochelle's salt synthesis

I tried to make Rochelle's salt. It didn't work! 7 oz cream of tartar 1 cup distilled water heat to 180 F and keep there add 1/2 tsp sodium carbonate at a time until there is no fizzing filter and ...
user0000001's user avatar
8 votes
2 answers
17k views

Why is the melting point of magnesium oxide higher than aluminium oxide?

There's a graph of the melting points of period three oxides. The melting point of magnesium oxide is several hundred Kelvin higher than aluminiumoxide. I can't find any explanations for this on the ...
Michael Harding's user avatar
2 votes
1 answer
2k views

Speed distribution of lighter vs heavier gases

I cannot understand why the range of molecular speed is not always wider for a lighter gas as compared to a heavier gas . If the same energy is supplied to both gases then wouldn't the molecular ...
search's user avatar
  • 285
1 vote
0 answers
6k views

What is the mechanism of reaction between alcohol and PCl5 [closed]

Is this one correct? If not why and what is the correct one?
Sneha Srikanth's user avatar
4 votes
1 answer
4k views

Why is the common magnesium ion Mg(II) and not Mg(I) when the second ionization energy is higher than the first ionization energy?

The first ionization energy for magnesium is given as $\pu{737.7 kJ/mol}$, and the second ionization energy is $\pu{1450.7 kJ/mol}$. Given this information, doesn't it take $\pu{737.7 kJ/mol}$ to ...
Cyclopropane's user avatar
  • 2,069
4 votes
1 answer
1k views

Why doesn't the oxidation of cellulose oxidise all the alcohol groups, and how does it cause discolouration?

In cellulose, there are several alcohol groups - the two on the ring being secondary alcohols, and the one on the branch being a primary alcohol. I would expect all of these to be oxidised in the ...
Noah P's user avatar
  • 165
5 votes
1 answer
4k views

Comparing energies of P−O, S−O, and Cl−O bonds

My text says that Bond energies of P−O, S−O, and Cl−O follow the trend P−O < S−O < Cl−O. But I think it should be a reverse of what's given because more the electronegativity difference, more ...
Physicsapproval's user avatar
-1 votes
1 answer
755 views

what is meant by stability and potential energy of molecules in cases of formation of bonds?

molecules form chemical bonds in order to gain stability. it is said that forming bonds leads to lower potential energy of molecules and makes them stable. what does stability mean? how formation of ...
user136782's user avatar
-1 votes
1 answer
3k views

One volume of something

I am following some protocols for a reaction and after diluting my substrate in a solution I need to precipitate it in methanol. For this I need to pour my solution into "one volume" of methanol- ...
Franco Grosso's user avatar
3 votes
1 answer
13k views

What is the effect of dilution on the degree of dissociation of a weak acid or base?

Please ponder on an equilibrium of a very weak base, say $\ce{MOH}$. This base undergoes a very low ionization, even in its pure form (pure form implies that there isn't the presence of a solvent). ...
Berry Holmes's user avatar
  • 4,134
3 votes
1 answer
3k views

Product of Williamson Synthesis

I read that, and was wondering that in the first reaction shown they have used a tertiary butoxide where ether is formed because there is a primary alkyl halide but in the second reaction, they have ...
Daksh Shah's user avatar
1 vote
1 answer
978 views

Nucleophilic attack on cyclic intermediates in dibromination and oxymercuration reactions of alkenes

Why does the nucleophile attack the most substituted carbon after the formation of a cyclic intermediate (three membered ring) in the cases of halogenation and oxymercuration of alkenes, as if there ...
MrObjectOriented's user avatar
2 votes
1 answer
1k views

How does one classify aqueous solutions of ions as acidic, basic and neutral?

The following is a homework question: Classify the aqueous solutions of the following ions as acidic, basic or neutral: $\ce{C6H5NH3+, Cl- , Fe^3+ , Mg^2+ , HSO4- , NO3- , NH4+ , Al^3+...
Mahathi Vempati's user avatar
3 votes
2 answers
1k views

Why energy of some intermediates of glycolysis increases?

It is possible that I do not understand the concept of energy, but according to the diagram in my book, the energy between steps 4 and 5 and between 6 and 8 increases. How is this possible? Also, as ...
Wiktor Lippa's user avatar
7 votes
1 answer
2k views

What makes scorpions glow under UV light?

What substance (or class of substances) is responsible for the neon blue-colored fluorescence we observe when we shine UV light on scorpions? Do note, I want to know what substance makes them glow ...
paracetamol's user avatar
  • 18.6k
0 votes
1 answer
444 views

Question regarding the mechanism of oxymercuration-demercuration of alkenes

Organic Chemistry by David R. Klein The text in between says that the more substituted carbon bears a partial positive charge. Why not the other one? I am asking this considering inductive effect, ...
MrObjectOriented's user avatar
1 vote
1 answer
3k views

Are alkylidene cycloalkanes planar molecules?

Above is an Alkylidene Cycloalkane. Its structure closely resembles that of allenes. According to my knowledge, allenes are non-planar molecules due to the two $\pi$-bonds being formed on almost ...
Ajay Subramanian's user avatar
1 vote
1 answer
79 views

PCC with substituted pyridines

I was wondering if substituted pyridines can work the way pyridine does in order to oxidize alcohols to aldehydes. Of course, I'm referring to pyridines without any functional group which can undergo ...
user avatar
-3 votes
3 answers
7k views

What is the chemical formula for snake venom?

I haven't been able to get this question answered through the internet so far, so I was looking for a more professional angle in which this question can be answered.
user43936's user avatar
4 votes
0 answers
106 views

What happens when I divide two molar flow rates in a chemical equation?

I don't quite know how summarize my question in the title. I have a combustion process given by this equation: $$\ce{C10H22 + 15.5 O2 + 58.25 N2 -> 11 H2O + 10 CO2 + 58.25 N2}$$ This process ...
Jose Lopez Garcia's user avatar
3 votes
1 answer
188 views

What is the mechanism that dihydrolipoic acid undergoes to be oxidized by FAD?

The mechanism for dihydrolipoic acid oxidation in the pyruvate hydrogenase complex is not clearly demonstrated in any Lehninger textbook, other than the fact that FAD becomes FADH2. I am wondering ...
Ryan David Ward's user avatar
4 votes
1 answer
2k views

First order, parallel reaction integration

I have parallel equations: \begin{align}\ce{A &->[k_b] B},&\ce{A &->[k_c] C}.\end{align} I understand how to determine formation of $\ce{A}$ (with the integration) but I really keep ...
juliodesa's user avatar
3 votes
1 answer
4k views

Calculations for making a buffer from a weak base and strong acid

How many moles of $\ce{HCl}$ must be added to $\pu{100 ml}$ of a $\pu{0.100 M}$ solution of methylamine ($\mathrm pK_\mathrm b = 3.36$) to give a buffer having a $\mathrm{pH}$ of $10.00$? (The answer ...
John Rawls's user avatar
1 vote
1 answer
9k views

Comparing first, second, and third ionization energies between atoms

Among the elements boron, carbon, nitrogen, and magnesium, what are the first ionization energies from least to greatest? What about the second and third ionization energies? I understand the first ...
Cyclopropane's user avatar
  • 2,069
7 votes
1 answer
6k views

Nomenclature of Halogen substituted Alcohol and longest chain

For the following compound, the correct IUPAC Name is "4-Chloro-3-ethyl-2-(1-methylethyl)-butan-1-ol" but according to what I know, Chlorine is a substitutent and alcohol is a functional group. So ...
Daksh Shah's user avatar
9 votes
2 answers
4k views

Bonding of Lithium and Argon

I saw a meme that was joking around about Lithium and Argon bonding (see pic below). It got me wondering: Can Lithium and Argon bond in any circumstance?
Christian Sirolli's user avatar
3 votes
1 answer
6k views

Why does soda explode if artificial sweetener or other powders are added?

I opened a can of soda and spilled some generic artificial sweetener into the soda and it exploded. Why did this happen? I am not talking about mentos, I mean artificial sweeteners like Splenda.
user avatar
2 votes
2 answers
4k views

What pressure is created by the electrolysis of water?

I am interested to know what is a reasonable maximum working pressure I could expect against the evolution of oxygen and hydrogen when electrolysing a typical water electrolyte. My aim is to make ...
KalleMP's user avatar
  • 646
0 votes
1 answer
1k views

Regioselectivity in addition of hydrogen iodide to vinyl chloride

I encountered a question which was stated as: The reaction of vinyl chloride with hydrogen iodide to give 1-chloro-1-iodoethane is an example of anti-Markovnikov addition. Is this true or false? ...
Ajay Subramanian's user avatar
1 vote
1 answer
15k views

Calculating conductivity of a solution given molar conductivities and concentration

From my understanding the conductivity of a solution ($K$) is given by the sum of the conductivities of ions in solution: $$K = c(K_{m,1}+K_{m,2})$$ Where $c$ is the concentration, and $k_{m1}$ and $...
WilliamHH's user avatar
-1 votes
1 answer
3k views

Why can't HCl be used in chlorination of alkane?

Is it because the HCl bond is strong or it is because we have to form HCl at the product side during the propagation step?
user43899's user avatar
0 votes
1 answer
103 views

A titration mixture having pottasium oxalate and pottasium hydrogen oxalate!

I came across this question, this is how it goes- A solution is prepared by dissolving a solid mixture of $\ce{K2C2O4}$ and $\ce{KHC2O4}$. A $\pu{10 ml}$ portion of this solution required $\pu{10 ml, ...
Vedant Parwal's user avatar
0 votes
1 answer
1k views

Singlet or triplet carbene

On reaction of diazomethane with ethene a carbene is formed as a intermediate . This carbene then attacks on the double bond and form cyclopropane . However I read that both singlet and triplet ...
Apoorv Jain's user avatar
1 vote
0 answers
92 views

Molar ratio of two oxides of the same metal

A certain "metal oxide" is made of the oxides $A$ and $B$ of the same metal. In the oxide $A$, the metal is divalent, and in B, the metal is tetravalent. By reduction with hydrogen of a quantity $a$ ...
featherless biped's user avatar
14 votes
2 answers
8k views

Are lithium bicarbonate and magnesium bicarbonate both soluble in water?

Are lithium bicarbonate and​ magnesium bicarbonate both soluble in water? Source: JEE Mains 2017 (National Level Examination of India) Please do cite a reputed source along with your answer. ...
iBoy's user avatar
  • 317
1 vote
2 answers
222 views

How to measure absorbance at 882 nm?

I am trying to measure the absorbance of a solution at 882 nm, but this seems to be beyond the range of many UV-Vis spectrometers. Is this a job for the IR spectroscopy, or something else? I do not ...
micronchip's user avatar
6 votes
2 answers
2k views

Na(s) vs NaCl(s) Entropy

I would think the crystalline, ionic solid would have the lower entropy, however, the tablature indicates otherwise. Why does $\ce{NaCl(s)}$ have a greater entropy than $\ce{Na(s)}$?
123chemask's user avatar
2 votes
1 answer
1k views

Gromacs: What can be reason of getting final potential energy greater than the starting one?

I wanted to optimize potential energy of a molecule using Gromacs software (v. 5.0.4, single precision). I was really surprised when I discovered that after running Conjugate Gradients integrator, the ...
Małgorzata Ga's user avatar

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