All Questions

0
votes
0answers
21 views

Do polar compounds move faster or slower in paper chromatography? [closed]

I know in TLC the more polar the compound is the less it travels, and the less polar the compound is the more it travels. Would this be the same for paper chromatography?
-2
votes
0answers
13 views

Epoxide Formation for Anti-dihydroxylation [closed]

Below I have posted my thought process for the epoxide formation in anti-dihydroxylation. I am very confused on the logic of this and would appreciate if anyone can help clarify this mechanism to me. ...
1
vote
0answers
30 views

What are the reaction products/by-products of a Tannerite explosion? [closed]

What are the products/by-products of the following reaction of "Tannerite"? I am looking to find out if any of the breakdown products pose an environmental risk. From Wikipedia on Tannerite: "Two ...
0
votes
1answer
22 views

Potential energy curve for dissociation of cation of carbon dioxide

Can anyone suggest me some literature where I can find the potential energy curve or the electronic states for singly ionized $\ce{CO2}$ ($\ce{CO2+}$) dissociating into singly charged oxygen ($\ce{O+}$...
1
vote
1answer
22 views

Acid value of linseed oil

For this we weigh $\pu{1.015 g}$ of linseed oil which is dissolved in alcohol. 3 drops of phenolphthalein (pH indicator) are added and a solution of potassium hydroxide of concentration $C = \pu{9.5e-...
1
vote
1answer
45 views

What is the driving force for Claisen rearrangements?

I came across this mechanism (3,3 sigmatropic rearrangement). Why does the allyl vinyl ether have the ability to rearrange itself giving a new product? What drives the reaction? Is it the instability ...
0
votes
1answer
49 views

Does a C=C double bond donate electron or withdraw it?

I have learned that a $\ce{C=C}$ double bond is electron-rich because of the p-p overlap and hence can easily donate an electron pair: I agree with this statement. However, in a $\ce{C=C}$ double ...
1
vote
2answers
35 views

What is meant by forward reaction?

While reading my chemistry textbook I came across the phrase: forward reaction is favoured by decrease in temperature in exothermic reactions. I was tripped off by the term 'forward reaction', can ...
-3
votes
0answers
118 views

Sulfuric hydrofluoric acid? [duplicate]

Comment on https://www.youtube.com/watch?v=Hxh92s5mIho showing it is the effect of sulfuric hydrofluoric acid.. Is it a effect of sulfuric hydrofluoric acid?
9
votes
3answers
943 views

Complex organic molecules

I am studying astronomy and came across the following term in the astrochemistry course called 'complex organic molecules' or also written as COMs. My question is: What is exactly meant with these ...
-1
votes
0answers
31 views

How is the predictability of the periodic table useful to chemists? [closed]

I spent about an hour on the web today searching for the answer to my question: "How is the predictability of the periodic table useful to chemists?". Thankfully, I stumbled upon this website where I ...
3
votes
0answers
24 views

Oxidative Addition - Really concerted?

I guess you are all familiar with the oxidative addition or reductive elimination reaction in organometallic chemistry. If you read further into the topic you may find different pathways like via ...
1
vote
1answer
137 views

Are all alkene geometrical isomers achiral?

I was reading a book and it tells that alkene geometrical isomers are achiral. I wanted to know that is it applicable for alkene geometrical isomers? Thanks in advance.
0
votes
0answers
13 views

why the deflection of electron from its original path increases with the increase in voltage across the electrodes [closed]

why the deflection of electron from its original path increases with the increase in voltage across the electrodes? How is it possible, we are told that when we increase voltage velocity increases
-1
votes
0answers
22 views

What should be the IUPAC name of the following Spiro compound?

According to me it should be named as: 9-Ethyl-6-formyl spiro[5.4] dec-3-ene-1-carboxamide Please check if I am correct.
-1
votes
0answers
24 views

Which of these models represent a binary lithium compound and with which element? [closed]

A chemist performs reactions that produce binary lithium compounds. These elements include sulfur, chlorine, nitrogen, fluorine, selenium, oxygen, and iodine. I think the elements are chlorine ...
0
votes
0answers
21 views

My problem with Tollen's reagent [duplicate]

The formula of Tollen's reagent is $\ce{[Ag(NH3)2]+}$. What is the bond existing between the silver(I) atom and the ammonia groups? Because ammonia is stable, it doesn't need to gain or donate any ...
-2
votes
0answers
12 views

What material is my pot and what is coating it please?

I have a large beaten metal pot I inherited from my parents. It was kept outside and entirely tarnished black, except for places in the inside which had a gold appearance (it's obviously not a gold ...
0
votes
0answers
19 views

Confusion regarding contact process [duplicate]

I'm talking about this video, from where I'm referencing. My problem is with stage 3. From what I understand, we need $\ce{H2SO4}$ for mixing it with sulfur trioxide to produce oleum. From oleum ...
-1
votes
1answer
56 views

What should be the IUPAC name of the following compound?

I think it should be named as 2-(cyclopent-1,4-diene)-2-methyl ethan-2-ol
-1
votes
2answers
47 views

Reason for shorter bond between sulphur and oxygen?

I resently came across this sentence in my textbook “the bonds between sulphur and oxygen in oxides of sulphur (SO2 and SO3 ) are much shorter than might be expected for a single bond“ I couldn’t find ...
2
votes
0answers
20 views

Confusion about prioritizing functional groups in case of poly functional organic compounds

According to Wikipedia, sulfonic acid $(\ce{-SO3H})$ is comparatively stronger than carboxylic acid $(\ce{-COOH})$. Then why is sulfonic acid lower in priority than carboxylic acid (while naming poly ...
-1
votes
0answers
14 views

Understanding Polymer Derived Ceramics [closed]

Polysiloxanes are pre ceramic polymers. What happens (in details) at the atomistic level as the polymer is heated until it reaches its ceramic end product $(\ce{Si_xC_yO_z})$ ?
4
votes
1answer
35 views

How to specify atomic carbon terms in the coupled and uncoupled representation?

So, we know, that the atomic carbon in the electronic configuration $1s^22s^22p^2$ has the following terms $${}^1S, {}^1D, {}^3P$$ My question is - how can I correctly specify these terms in the ...
2
votes
2answers
44 views

Reactivity of primary and tertiary alkyl halides

From USNCO 2004, Q58: The reaction between which pair of reactants occurs the fastest for $[\ce{OH-}] = \pu{0.010 M}$? (A) $\ce{CH3CH2CH2CH2Cl + OH-}$ (B) $\ce{(CH3)3CCl + OH-}$ (C) $...
0
votes
0answers
13 views

Acid medium versus Basic medium characteristics in organic reactions [closed]

I am kind new in the study of organic reactions and I have collected some points to write differences between acid medium and basic medium: Acid medium 1)favors strong oxizidation 2)favors ...
-2
votes
0answers
18 views

How to calculate gibbs free energy [closed]

How is delta G calculated gibbs free energy it says its has enthalpy in KJ/g Mol and temperature in kelvin but how is entropy measured in what units?
0
votes
1answer
17 views

How to find concentration of three species from given molar absorptivities [on hold]

If I am given the molar absorptivities of three species at a given wavelength, and I only have the concentration of one of those species, how can I determine the concentrations of each of the ...
-1
votes
0answers
21 views

How can I precipitate metal ions from a solution? [closed]

I'm in Grade 12 Chemistry. We're doing some solubility, and one of the things we need to be able to do is explain a procedure where we separate metallic ions from a solution. So, for example, how can ...
3
votes
1answer
116 views

How does Grignard reagent form? [duplicate]

So I've read that during the formation of the Grignard reagent, The R-X bond cleaves homolytically forming free radicals. My question is how is this happeneing? Due to the high electronegativity ...
5
votes
1answer
47 views

Can =NH2+ in Arginine's side chain form hydrogen bonding at physiological pH?

I know that at physiological pH, Arginine will have its $\ce{=NH}$ protonated to $\ce{=NH2+}$. I was wondering if this $\ce{=NH2+}$ can still form a hydrogen bond by being a donor? And does the ...
1
vote
0answers
20 views

Other than ultracold lithium gas, are any ferromagnetic or magnetic gasses known or hypothesized?

I'm dealing with an interactive work of fiction right now, and one proposal is to combine two types of puzzles with a magnetic gas. I know that fermionic $\ce{^6Li}$, when cooled below $\pu{1 K}$, has ...
-1
votes
0answers
14 views

Ligand exchange/substitution [closed]

When ligand substitution reaction will occur with no change in either the coordination number and in the charge on the complex ion? for example, in the case co2+ with ligands H2O, NH3, Cl, C2O4 or ...
-1
votes
1answer
35 views

What gas is released when heating sulphuric acid? [duplicate]

I'm doing a chemistry project and am really unsure about the gas released when heating sulphuric acid.
9
votes
1answer
588 views

Formula of Oxone

A problem in my book asked the commercial name of sodium peroxide. The answer given was 'Oxone'. Even the website https://www.911metallurgist.com/oxone/ mentions oxone as sodium peroxide. However, ...
0
votes
0answers
44 views

heat produced to make Fe [on hold]

For production of pure iron from $\ce{Fe2O3}$, a factory is mixing carbon monoxide with this iron oxide. Given the information below and assuming the yield 100%, how many kilowatt hours would be ...
1
vote
1answer
32 views

Why is excluded volume in van der Waals equation divided by 2?

Source: Physics Stack Exchange The excluded volume calculated based on the diagram is 8 times the volume of a molecule. The volume is then divided by 2 to give the so-called excluded volume per ...
13
votes
1answer
339 views

ICHO Synthesis Problem 2018

I've several doubts about this ICHO synthesis problem, which was a part of the preparatory problem package of 2018 (so yes, it's not a part of an ongoing contest) Before sharing the answer given, I'...
0
votes
0answers
18 views

Equilibrium constant kp or kc? [closed]

In electrochemistry , nerst equation we use logkc if chemical species are in solution form but if gases then we use logkp. But kp and kc are different emf of cell will come out to be different by ...
-1
votes
0answers
22 views

Oxidation of Metals

Solid metal crystals are composed of metal cations bound to delocalised electrons whereby the metal cations exhibit a full outer shell. So why do solid metals undergo oxidation when the metal cations ...
-1
votes
0answers
16 views

Oxidation of a metal by an inorganic acid [closed]

What is the effect of particule size and temperature on the reaction of a metal and an inorganic acid? I need it for a paper that I have to hand in but I cannot find the answer anywhere and I haven't ...
1
vote
1answer
28 views

Can an iodine clock reaction work without using a strong acid?

I'm going to do an iodine clock reaction for a project and we had to submit the materials and safety sheets for the experiment a while ago. I thought I could do one by using hydrogen peroxide, sodium ...
-1
votes
0answers
10 views

How to calculate pollutant mass concentration in exhaust air?

I want to calculate the mass concentration of methane in exhaust air as unit gram per cubic meter per hour. Assumed we have the following situation: A bioreactor ...
-2
votes
0answers
34 views

Safe liquid with a boiling point > 275F

Is there a non toxic inexpensive liquid which can be safely heated to 275F without worry of it combusting? It would be used to apply heat to PVC to soften it for forming. Perhaps propolyne glycol?
0
votes
0answers
19 views

What does [O] denote in organic redox reactions? [duplicate]

I've seen a few examples in the lectures we've been having and I wasn't able to find any sources talking about it. I think I remember a previous teacher saying it was a symbol for oxidation itself, ...
7
votes
3answers
410 views

What is the maximum distance over which van der Waals forces act?

The VDW radius places a lower limit on the distance between atoms mutually attracted to one another. I am looking for the upper limit: what is the name of the concept or theory that describes the ...
-2
votes
0answers
11 views
-1
votes
0answers
7 views

How to know when is an enzyme activated and when it is in inhibited condition [closed]

procedure for finding optimum conditions for enzymes such as : 1)temperature 2)ion type 3)substrate 4)activators and inhibitors.
0
votes
0answers
27 views

What solvent can dissove both antimony chloride and titanium isopropoxide?

Am trying to create antimony doped titanium dioxide thin film. I plan on doing so with SILAR(successive ionic layer adsorption and reaction). My cationic precursor will be a solution of both antimony ...
1
vote
1answer
33 views

How to effectively wash the precipitate or crystals on the filter and why?

My lab manual says that the precipitation on filter should be washed with a few small portions of the washing liquid. Why can't I just completely fill the filter funnel with the solvent instead of ...

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