Questions tagged [reactivity]

Applied to a chemical species, the term expresses a kinetic property in reference to another species. The tag should be applied to questions seeking answers with respect to the reactivity (or unreactivity) of a certain chemical compound, species, molecular entity and/or functional groups. It must not be applied to questions about the stability of certain chemical species.

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About stability and reactivity? [closed]

it has been said by my teachers and even in internet that tertiary carbocation is more stable than secondary my question is if it more stable then why does it forms products?
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Does manganese reacts with water at "not" standard conditions?

In my answer, I stated that manganese is said to not react with water under normal conditions although some sources say it reacts with water to liberate hydrogen gas. Does it implies that it reacts ...
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Does solid manganese reacts with atmospheric air when heated?

As discussed in my answer, manganese is not particularly reactive to air. The surface of manganese lumps oxidize to a minor extent but when it is finely divided, it becomes pyrophoric and burns in air....
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Oxidation Reactions/Reactivity of Manganese Metal in Air and Water

I am planning on doing some reactions that lead to Manganese metal and a neutral solution containing $\ce{Mn^{2+}}$ as by-products, and I wanted to try some things out with the Manganese as well. ...
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Why is hydrated Lime Ca(OH)2 more reactive than standard quicklime CaO?

As the title suggests. I've been looking into geopolymer research papers and have seen that some people use Ca(OH)2 instead of CaO to achieve faster reaction rates but I'm not sure why and I can't ...
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3 votes
3 answers
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Where does the energy required to initially begin the reaction of iron and oxygen come from?

When iron is left outside, over time it reacts with oxygen to form iron oxide or rust. But how does the oxygen react with iron, isn't iron held together by strong metallic bonds? Where does this ...
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3 votes
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How to explain mesylate structural homologues (e.g., "esylate") being weaker leaving groups than mesylate itself?

I came across a piece of scientific literature (https://patents.google.com/patent/US20080045602A1/en) that would seem to imply leaving groups formed by reacting hydroxy groups with, e.g., ...
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4 votes
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How should the reactivity of 1-propanesulfonyl chloride be expected to compare to tosyl chloride for sulfonylation?

I've come across some scientific literature (e.g., https://doi.org/10.1021/jm400751p) that notably feature 1-propanesulfonyl chloride (PsCl) in the selective activation of hydroxy groups, such as a ...
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1 answer
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Does nickel precipetate gold and copper?

I dissolved some CPU s and RAM s in aqua regia the day after I found a green solution with black powder in the bottom. So what just happened is it nickel or tin from solder?
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Displacement Reaction [closed]

In a displacement reaction I understand that the more reactive metal essentially takes the place of the less reactive metal. But I can't seem to understand how this more reactive metal can break the ...
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1 vote
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Reactivity vs Stability: Chlorine Trifluoride

Chlorine trifluoride shows up on many pop science content, which is how I learned about it just today, as an incredibly reactive compound capable of oxidizing seemingly incombustible substances (glass,...
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1 answer
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Why urea crystallizes in aqua regia? [closed]

Recently I stripped gold from old cpu's with ferrous chloride after that I rinsed the cpu's and dissolved them in the aqua regia to get the gold inside when all done, I added urea solution to the ...
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In school, I learnt that Potassium is the most reactive element in the reactivity series. I thought it was Francium?

In school, I learnt that Potassium is the most reactive element in the reactivity series. In the periodic table, the further you go down the more reactive the elemnt is. If this is true, then shouldn'...
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-2 votes
1 answer
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Why does a carbon double bond "break readily" but this is not so for other elements (nitrogen double and triple bonds are stronger)? [duplicate]

A level chemistry student here, fairly basic question. We always learnt (from GCSE bond enthalpies) that "Bigger bonds are stronger", so to speak; my teacher often quoted $\ce{N#N}$ as very ...
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2 votes
1 answer
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Can metal displacement reactions happen with insoluable salts?

I know how normal metal displacement reactions work. If one metal is more reactive than the other, they will displace. For example, normally for this reaction: $$\ce{Fe_{(s)} + 2AgCl_{(aq)} -> Fe^{+...
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Why doesn't XeF6 displace oxygen from water?

Consider the following reactions (unbalanced): $$ \begin{align} \ce{XeF2 + H2O &→ Xe + HF + O2} \tag{a} \\ \ce{XeF4 + H2O &→ XeO3 + Xe + O2 + HF} \tag{b} \\ \ce{XeF6 + H2O &→ XeO3 + HF} \...
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-1 votes
2 answers
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Are intermediate bulk container units suitable for storage of isopropyl alcohol? [closed]

I'm working in water treatment construction and my boss is going to be stocking isopropyl alcohol (IPA). He wants to store the chemical in bulk, with amounts ranging from 5000 L to 10000 L in IBC ...
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1 vote
1 answer
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How is propene more reactive as well as more stable than ethene?

I know that hyperconjugation stabilises a double bond. But in propene an electron-donating group $(\ce{-CH3})$ is increasing the electron density at the double bond, so its nucleophilicity should be ...
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Why does the reaction of Brady's reagent and cyclohexanone not also form an enamine-type product?

In this reaction in a Khan academy video, cyclohexanone reacts with Brady's reagent to form hydrazone product. My question is why doea Brady's reagent + cyclohexanone not also form an enamine product ...
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-2 votes
2 answers
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Way of determining based on atomic characteristics what to expect during reaction [closed]

So I believe the question was clear, but here goes. I would like to know the rules for determining the following properties of a molecule, and/or of a reaction it produces with another molecule or ...
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-1 votes
1 answer
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How displacement reaction actually taking place? [closed]

"When a zinc plate placed in copper sulphate solutionfor some time,after sometime we can see holes in plate , why?" So this was a question in my book , I don't want answer of this one. But I ...
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What are some other examples of non-nucleophilic acids, other than boronic acids?

Boronic acids can react as a Lewis acid, after reaction they are not good nucleophiles as the conjugate base. What are some other examples of such non-nucleophilic acids (or acids that have a non-...
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2 votes
1 answer
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Reactivity of Benzaldehyde vs Acetaldehyde and Benzoic acid vs Acetic acid

I was trying to compare the reactivity between acetaldehyde and benzaldehyde. After some googling, I found out that benzaldehyde is less reactive than acetaldehyde because the benzene ring can ...
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0 votes
2 answers
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Can stainless steel be electrically insulated with (oven-dried) Sodium Silicate Solution?

Can I electrically insulate stainless steel by painting Sodium Silicate solution on it and heating it to 200C for 30min or so? The solution should be conductive, and I've been told (to be verified) ...
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Effect of R/S configuration on reactions not involving the stereocentre

An exam question involved the following reaction - + forms Both reactants (2-methylbutanoic acid and 2-methylbutanamine) are optically active. The question used pure R-enantiomer of the acid, and a ...
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8 votes
1 answer
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Why does radium form a nitride rather than oxide when exposed to air?

The Wikipedia article states: Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) on exposure to air, forming a black surface layer of radium nitride ($\ce{Ra3N2}$)....
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1 vote
1 answer
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Bond Polarity vs bond length's effect on reactivity of haloalkanes

My textbook says: Carbon acquires partial positive charge whereas halogen acquires partial negative charge. Halogen becomes nucleophilic in character, which can be replaced by another nucleophile on ...
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Relation between Ionization energy and reactivity

So I was learning about the periodic table where I came across the topic of ionization energy. As a general trend the Ionization energy decreases as we move down a group with a few exceptions such as ...
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3 votes
1 answer
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The dependency on electron density in the reactivity order of electrophilic and nucleophilic additions

It is well-known that for electrophilic addition across an alkene, the reactivity increases when intermediate carbocation is more stable (eg. addition of $\ce{HBr}$ or acid-catalyzed addition of $\ce{...
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2 votes
1 answer
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Why is it technically inaccurate to say that the decrease in reactivity of halogens is due to decreasing electronegativity?

I came across the following information in this post. Below the infographic there is a paragraph with a disclaimer: As another disclaimer, the reactivity of the halogens decreasing down the group ...
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Reactivity order of DIBAL-H and diborane with esters and acids

I have been taught in class that DIBAL-H is more reactive towards esters than carboxylic acids while opposite is true for diborane. Also DIBAL-H mentioned is taken under low temperatures (−78 °C). I ...
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3 votes
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Competition between aromatic sulphonation and nitration

Say you take a substituted benzene* and react it with oleum and nitric acid. Would it result in a nitrated ring, a sulphonated ring, or some sort of a combination? Thinking about it in terms of the ...
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0 votes
1 answer
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Will dioxygen difluoride set fire to sand? [duplicate]

I've heard that dioxygen difluoride (a.k.a FOOF) would set fire or react with nearly everything including sand ,bricks or even ice. Is this true?
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2 votes
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Regarding stability and reactivity of m-xylene

I came across the following two details about m-xylene: m-Xylene is thermodynamically most stable compound among o-xylene, m-xylene, and p-xylene. m-Xylene is most reactive towards nitration and ...
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5 votes
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Orbital Interaction for electrophile and nucleophile

Clearly, the above diagrams depict the interaction between empty orbital of electrophile with filled orbital of nucleophile. We may assume that the HOMO of nucleophile being more electronegative will ...
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-2 votes
1 answer
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Reaction of alkynes with sodium in liquid ammonia [duplicate]

Problem The hydrocarbon which can react with sodium in liquid ammonia is? (A) $\ce{CH3CH2C#CH}$ (B) $\ce{CH3CH=CHCH3}$ (C) $\ce{CH3CH2C#CCH2CH3}$ (D) $\ce{CH3CH2CH2C#CCH2CH2CH3}$ Answer Question I ...
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3 votes
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Reactivity order among Interhalogens

I was reading about Interhalogens in JD Lee and in the book it is stated that (without any reasoning) the reactivity order for few of the interhalogens is :- $\ce{ClF_3 > BrF_5 > IF_7 > ClF &...
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2 votes
1 answer
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Compare reactivity of carbocations and stability of carbanions, radicals, and carbocations

For ranking the carbocations in the image above, I thought of taking the approach that the 1st molecule, the secondary carbocation was the most reactive because it has no electron donating group, then ...
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2 votes
0 answers
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What does Molecular Orbital Theory allow you to predict?

Molecular Orbital theory reveals the outcome when two atomic orbitals overlap. Almost all of the time we draw a Y axis with the notation of energy that can be described using electron volt units (eV). ...
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1 answer
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Why is titanium not found in its pure state in nature? [closed]

I am doing a research project on titanium and I know it is found in ores and compounds rather than in a pure state, but I am unsure why? How does this relate to its reactivity?
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4 votes
1 answer
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p-Nitroaniline reaction with sulfuric acid

An alternative version of the well-known demonstration carbon snake (the dehydration reaction of sugar by concentrated sulfuric acid forming a column of graphite) consists in mixing paranitroaniline ...
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Why is the standard enthalpy of formation of aluminium oxide higher than magnesium oxide?

$$\begin{align} &\text{Aluminium oxide:} &\ce{4Al + 3O_2 &-> 2Al2O3} &(\Delta H_\mathrm f &= \pu{-1675 kJ/mol})\\[1.5em] &\text{Magnesium oxide:} &\ce{2Mg + O_2 &-&...
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1 vote
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Which is more reactive in E1, benzyl or allyl

I'm don't know the english terminology for chemistry so sorry for probably butchering some terms. My question is, which of these is more reactive in an E1 reaction: The bottom two are the ...
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-1 votes
2 answers
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Reactivity of Silicon [closed]

$$\ce{SiO2 + 2C ->[2200°C] Si + 2CO}$$(Ref) In this reaction, C is apparently displacing Si from SiO2. Does this mean C is more reactive than Si? But Si is more electropositive than C. What is the ...
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Does CH3COOH + H2O (vinegar) lose its antibacterial and antiviral properties when exposed to air?

I have been reading about using CH3COOH + H2O (vinegar) as a mild antibacterial and antiviral agent. For example: https://pubmed.ncbi.nlm.nih.gov/15698693/ Note, before anyone gets confused (or ...
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1 vote
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Red Compound from Glycine and Glycerol?

I got an unexpected reaction which I'm trying to explain to myself: I mixed 10 parts glycerol with 1 part glycine at ~90C and to my great surprise the mixture turned from transparent to a tint of red. ...
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1 vote
1 answer
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Reaction of unsaturated lactone and alcohol

Image source I found this equation to turn this compound into an ketoester but I am unsure of the reaction mechanism. I postulate that the alcohol attacks the carboxyl carbon, the O becomes formally ...
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-1 votes
2 answers
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Can a weak acid react to give a stronger acid? [closed]

I was trying to understand why $\ce{AgCl}$ does not dissolve in $\ce{HNO3}$ and the reaction I could think of was something like this: $$\ce{AgCl + HNO3->AgNO3 + HCl}$$ I could not understand why ...
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Alternative explanation of ethene's pi bond [closed]

This tutorial about ethene's bonds has the following paragraph that I hope someone can paraphrase in a better way: The pi bond dominates the chemistry of ethene. It is very vulnerable to attack - a ...
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What is the product of ammonia reacting with silicone?

I used a soft silicone hose to carry ammonia at ~70 °C. I was surprised to later find the hose had hardened. A quick materials compatibility search for silicone had given me a lot of info but an "...
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