# All Questions

31,747 questions
Filter by
Sorted by
Tagged with
9k views

### Why does cyclopropane react with bromine?

In my exam, I was asked why cyclopropane could decolourise bromine water (indicating that it reacted with the bromine). All I could guess was that it is related to the high angle strain in ...
61k views

### Why do strong acids have weak conjugate bases?

This question is based on the Brønsted-Lowry model. I saw many answers to similar questions online. However none of them have given a detailed answer that is based on molecular structure (the answers ...
528 views

### What is the Structure of FeSO₄ • NO?

What is the structure of $\ce{FeSO4 \cdot NO}$ that is formed when $\ce{NO}$ is passed through ferrous sulfate solution? If it is a brown ring complex then why does the complex sphere break upon ...
5k views

### How do non-ionic compounds dissolve into water? Into molecules or atoms?

I can't seem to find the answer in google, which is surprising. I'm aware that ionic compounds dissolve into electrolytes. However, when non-ionic sacarose for example dissolves in water, does the ...
5k views

### What is Redox reaction? Is it really possible? [closed]

I was a reading a book that a senior gave me, it said that redox is a type of reaction in which both reduction and oxidation take place. I know about oxidation but not reduction. After googling ...
642 views

### How are Organic Compounds named? [closed]

I have heard of of a special system which specially deals with naming of organic compounds. How do we get names such as 2-methylpropan-1-ol. I have tried googling it and found few links but their ...
723 views

### How are electrons in conjugated molecules excited? [duplicate]

I have recently started reading about colour in organic molecules and come across conjugation of pi bonds. My question is pretty short... In transition metal ions I understand colour is caused by ...
1k views

### Normalization of the wavefunction φ(x) = A

I was trying to normalize the wave function $$\psi (x) = \begin{cases} 0 & x<-b \\ A & -b \leq x \leq 3b \\ 0 & x>3b \end{cases}$$ This is done simply by evaluating  \int\...
230 views

### Nitrogen lone pair electrons on 2-acetyl-1-pyrroline

Please consider 2-acetyl-1-pyrroline: http://en.wikipedia.org/wiki/2-Acetyl-1-pyrroline What is the molecular geometry of the nitrogen lone pair? Is the lone pair oriented in-plane with the ring? ...
574 views

### Why do NaHCO₃ and KHCO₃ have different crystal structures?

Why do $\ce{NaHCO3}$ and $\ce{KHCO3}$ have different crystal structures? We had this in a test today and this got me stumped... My questions are: Do $\ce{NaHCO3}$ and $\ce{KHCO3}$ possess crystal ...
3k views

### Why is tetrathiocyanatocobaltate(II) blue?

Why is $\ce{Co(SCN)_{4}^{2-}}$ blue? I simply can't predict the colors of such inorganic salts. I have learned that $\ce {Co^{2+}}$ salts are pink in color. Also, if the ligand is a strong field ...
2k views

### Is there a mathematical generalization for the number of isomers (structural and configurational) of a given compound?

The original question was: How do I find the number of structural and configurational isomers of a given compound? is there any formula? For a specific example, how would I find the number of ...
70 views

### What type of material is this and how is it corroding?

So I was thinking about corrosion and I came across this structure(see image) Do you think the inner metal/alloy that is corroding is steel? Also, what do you think the outer layer (in white) is? ...
720 views

### Definition of nucleophile

I came across this definition. When discussing nucleophilicity we’re specifically talking about donating a pair of electrons to an atom other than hydrogen (usually carbon). When a species is ...
901 views

### Rationalizing Acidities of Ammonium Ion and Hydronium Ion

Stumbled across this interesting practice problem in my organic textbook. I have a few reasons for why $\ce{H4N+}$ is less acidic than $\ce{H3O+}$. 1) Let’s assess conjugate stability first. ...
2k views

### Mechanism of Acidity - Boric Acid [closed]

How does boric acid behave as an acid? Is it a Lewis acid or a Brønsted-Lowry acid?
807 views

### Cyclic Voltammogram - How to determine Overpotential

http://youtu.be/1f92vGOridg Clicking on the link above will take you to a video with a diagram of a voltammogram. Through my own experiments I have managed to obtain a similar diagram. However, I am ...
3k views

832 views

### Which process is used to separate Hydrogen and Oxygen from Water?

What's the process called where you can use electricity to separate the oxygen and hydrogen from water? Is it electrolysis? Can it be applied to other liquids?
2k views

### Preparation of phenylamine/aniline

This is the procedure I carried out in class: Reduction of nitrobenzene by using tin and $\ce{HCl}$ acid After the completion of the reaction, $\ce{NaOH}$ added to neutralize excess acid and dissolve ...
10k views

### Ionizable hydrogen atoms for acids

Given that hydrogen atoms that are attached to a compound must be ionizable for the compound to be an acid, what prevents a hydrogen from being ionized? Is it solubility. If the bond is nonviolent, ...
2k views

### Why are alkali and alkali earth metals indicative of a strong acid? [closed]

Why are alkali and alkali earth metals indicative of a strong acid? Does anyone know why it is so? Or tell me what is indicative of strong acids?
8k views

### Why is the reaction between hydroxide and water reversible, when the reaction between oxygen ions and water is not?

Why is the reaction between hydroxide and water reversible, when the reaction between oxygen ions and water is not? And is there a reason why the products of reaction 2) are written separately, ...
981 views

### Why doesn't the boiling point of an aqueous solution depend on intermolecular attraction?

I understand that boiling point is a colligative property for aqueous solutions, and that it empirically depends on the mole fraction of the solute, rather than the identity of the solute. I ...
3k views

### Vibrational Spectrums of HI, HBr, HF, and HCl

Do you all know of any large graphs for the vibrational spectrums of HI, HBr, HF, and HCl? I need graphs that are large enough to see the spacing between the peaks in the spectra of HCl, HBr, and HI. ...
12k views

### Why are vinylic and arylic carbocations highly unstable?

I have checked the internet and read quite a few books, but I still am not able to understand why vinylic and arylic carbocations are highly unstable. What I found while surfing the internet is: For ...
31k views

### Distinguish between symmetric and asymmetric molecules with IR

I get increasingly nervous as I get my organic lab course reports. For, I often get asked whether the peak in the IR comes from an asymmetric or symmetric stretch. I've looked at about ten books and ...
2k views

### Identify this ion

These are the results I got for my experiment. I'm having trouble interpreting the results. As you should be well aware of, Lithium and Strontium both burn with crimson red when they are placed in a ...
155 views

### An example to illustrate the difference between an inversion operation and a twofold rotation

Reading in Atkin's Inorganic Chemistry book, I cam accross: Although an inversion and a twofold rotation may sometimes achieve the same effect, that is not the case in general and the two ...
143 views

### How can one come to know how a catalyst affects a reaction when the reaction and the catalyst is known [closed]

How can I come to know how a catalyst affects a reaction when the reaction and the catalyst used is known. I searched the internet for an answer but could not find one.
206 views

### Removing diamonds from a 14 karat gold ring with acid

I have a 14 karat gold ring with diamonds. I want to weaken the metal (to get the diamonds out without damaging them). If I dip the ring in sulfuric acid, will I be able to dissolve the base metal in ...
239 views

### Cyclopentadiene/etc. hydrophobicity after nitrogen atom substitution at a double bond?

If I take a compound like cyclopentadiene ($\ce{C5H6}$) and I substitute a nitrogen for a carbon at one of the $\ce{C=C}$ bonds (making a $\ce{C=N}$ bond), how does this typically change the ...
2k views

### Internal and external pressure during a gas expansion

There is a solid substance in a rigid cylinder with a piston placed on top such that the distance between the piston and the bottom of the cylinder is essentially zero, and then the substance ...

15 30 50 per page