All Questions

Apart from the borax and the phosphate bead tests, there's also this one. It's done by heating the white bead of sodium carbonate and the salt with potassium nitrate; green and yellow colours ...

Though all three Anthracene, Naphthalene and Benzene are aromatic, why is benzene considered the most aromatic? What determines the strength(degree) of aromaticity? How do we determine the strongest ...

It says in Wikipedia that lead tetrahydride or hydrogen plumbide or plumbane (PbH4) is supposed to have lead in it's -4 state and the hydrogen is in its +1 state because supposedly lead has a higher ...

From the question "Place 2 mL of Nitric acid in a test tube and add a small piece of Zinc turning" I thought that the overall net ionic equation would be Zn + 2H+ --> Zn2+ + H2 Is this ...

I understand that to compare relative acidity one must consider the stability of the conjugate bases. Across a period the electronegativity of an element increases. And that is for example why HF is ...

I'm running EEMS on some water samples on a Horiba Fluoromax 4 spectrofluorometer. Method below. 240-580nm emission, 5nm interval, 1nm width 240-480 excitation, 5nm interval, 1nm width 0.01 mg/L ...

I am, as a fun off-syllabus investigation, looking at hard water and how effective the EDTA titration method is, for permanent and temporary hard water. I ran a titration today and had horrific ...

Would like to ask if you can hit me up with some sources or link or suggestion for a protocol that would evaluate gel shrinkage. This is a gel that decreases irrigation flow and after the test, we ...

I am a Beginner in Learning Atomic structure and I am getting confused at Aufbau's principle For instance,Let us consider the example of atom's electronic configuration It is stated that the electrons ...

Why in this problem there isn't a diastereomer with the $\ce{-CH3}$ in the back (dash) and the $\ce{-CH2CH3}$ in front (wedge)?

As explained by my teacher a single ionic bond is always weaker than a single covalent bond. Due to lattice formation the ionic compounds have high melting point and boiling point. Is it beacuse ...

if we electrolysis water in a closed container H2 and O2 is formed, now as the container is closed both gases remain there when the electrolysis stop and water cool down will h2 and o2 remain in the ...

I found this question on the internet that said: Find the pOH of the solution obtained by mixing $\pu{0.1 mol}$ of $\mathrm{NH_4 OH}$ $(K_\mathrm b = 10^{-5})$ and $\pu{0.1 mol}$ of $\ce{(NH4)2SO4}$ ...

I am interested in unsolved problems in coordination chemistry, from particular cases to the most fundamental phenomena. Thanks in advance

I'm going through some papers about HSQ (hydrogen silsesquioxane) and keep seeing this fractional notation being used: HSiO3/2 , SiO4/2 , H2SiO2/2 , H3SiO1/2. Example paper. I understand that the ...

I had this question on a test and I'm unsure on why ethanol is required for the reaction. I understand that you need the ammonia and water to make oxonium ions needed for the reaction to occur. We had ...

I've just been taught about the effective nuclear charge and screening effect in school. I'd like to ask and confirm if the effective nuclear charge is only defined for valence electrons. If not then ...

The following question has troubled me for a while now. A virtual weak acid $\ce{HA}$ dissociates as follows: $\ce{HA <=> H^+ + A^-}$ with the acid dissociation constant $K_\mathrm{a} = 10^{-3....

How does air tight objects stick,what is the mechanism behind it

I read a question as stated above. Is this reaction even possible because as far as I know CO is only produced when there is not enough oxygen. In case it is correct, please provide me with an answer.

A qualitative test for the iodide ion involves reacting the salt solution with copper sulphate. This is said to yield the triiodide ion and the white precipitate of $\ce{Cu2I2}$. I haven't been able ...

I don't understand why on the problem a. B and C are enantiomers, while on the problem b. B is identical to the last molecule.

When I run a linear-response time-dependent DFT calculation in my favourite electronic structure program, for each excitation I'm given an oscillator strength, $f_i$, and transition dipole moment $$\...

If I were to dissolve silver nitrate in water, I would get $\ce{Ag+}$ and $\ce{NO3-}$ ions distributed in the solution. Will they be distributed as aggregates of positively charged silver and ...

The chemical shift of enantiotopic protons is defined as follows in Spectroscopy/Homotopic, Enantiotopic, Diastereotopic Enantiotopic protons have the same chemical shift in the vast majority of ...

Can $\ce{H2SO4}$ oxidize $\ce{HCl}$ to $\ce{Cl2}$? I know that $\ce{KMnO4}$ can do it, but my question is considering $\ce{H2SO4}$. In sulfuric acid, sulphur is in +6 oxidation state and in $\ce{KMnO4}...

here,should I prefer hydride shift or a product with more $\alpha$ hydrogens? my doubt is...as hydride shift is easier than methyl shift,the answer should be $a$ or $c$.if methyl shift takes place the ...

Before you answer the question, please note I am not a chemist or a physicist, I'm simply curious. My question is in the context of scarcity. Is it possible to artificially create materials such as ...

Extending This question further Sulfuric acid because of its low volatility can be used to manufacture more volatile acids from their corresponding salts To use this statement in practice I need to ...

I need to find electron configuration for an element beyond 118 (I don't want to tell the element's atomic number 'cause I need to find the electronic configuration). I'm able to find electronic ...

In Finkelstein reaction we know when a primary alkyl chloride or bromide is treated with NaI in acetone, we get the corresponding alkyl iodide Now acetone is a polar aprotic solvent and order of ...

I was wondering why a a salt that dissociates in water will be a mixture? The definitions for a mixture says that "Components do not chemically react with each other." Isn't dissociation ...

Which has maximum number of oxygen atoms? (A) 1 gm of O (B) 1 gm of O2 (C) 1 gm of O3 (D) All have same no. of O-atoms Please explain with the reason !

What would the word equations be for the following two situations? Initially $\ce{Na2CO3}$ and $\ce{NaHCO3}$ were present as 2 unknown powders, dissolved in water, and phenolphthalein was added to ...

I was recently looking at a paper about novel organic dyes for efficient dye-sensitized solar cells and one point the authors made was that out of the two dyes mentioned the one with a larger pi-...

I am trying to figure out how to explain $1s \rightarrow 3d$ spectroscopic transitions for $\ce{Fe^{2+}}$ in $T_\mathrm{d}$ symmetry. These transitions make up the pre-edge region in K edge X-ray ...

How would I answer a question like this on a test? Removal of one of the products of a chemical reaction has the effect of causing the reaction to go to completion. Explain this in terms of Le ...

I am trying to synthesizing 1-naphthaleneacetic acid from naphthalene and monochloroacetic acid. I found some patents and papers, and I have tried to synthesis but the yield is low. I used iron powder ...

I am required to write the Nernst equation for the following reaction: $\ce{O_2 + 4H^+ + 4e^- -> 2H_2O}$ Clearly, here $\ce{O_2}$ is getting reduced from an oxidation number of zero to an ...

As in the title, I have a reaction to witch I need to give the mechanism.

Why is F a bad leaving group? I thought that a good leaving group is one that tends to leave easily (=strong acid or weak base) and is stable (ergo a weak base or a strong acid). So wouldn't F be a ...

The human body contains between 80,000 and 400,000 different kinds of proteins. Which protein or class of proteins requires the most energy to produce?

Could ammonium phenolate be merely a solution of ammonia in phenol? Ammonium phenolate (or phenoxide) is a liquid with a CAS number, 5973-17-1, and boiling point of 181.8$^o$C http://www.chemnet.com/...

For context, I am a potter and am interested in collecting and processing all materials that I use by myself. One of the processes which I use is calcination of certain minerals like feldspar, so that ...

In caves we sometimes see large structures known as stalactites and stalagmites. These formations are made of crystals of the insoluble compound calcium carbonate, CaCO 3 (s), also known as limestone. ...

When we say that nitrogen occupies 78% , oxygen 21% and other gases 1% by volume of the total volume of air, what do we actually mean by it? I am confused because I have been told that molecules of ...

Please draw out and explain the mechanism for Dehydration of benzaldoxime with acetic anhydride rection. I'm struggling to find anything about it. Thank youuu :)

Titration continues until one of the reactants (the one in conical flask) turns out to be a limiting agent as far as I know. From the titration of a weak acid and a strong base, I could learn that the ...

Now as acids accept electrons and so must be called oxidizing agent. and I feel it to be a bit contradicting. please clarify if any misconception

Consider for example ethanol being heated in the presence of copper at 300 °C. How does it give ethanal as a product? Copper being in its elemental state (oxidation state 0). Since negative oxidation ...