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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34 views

How can you calculate the tendency of one compound to become another?

Excuse my inexperience with chemistry here. I've been poring over papers with terms like "Standard Gibbs free energy of formation", "Hess's Law", "standard enthalpy of ...
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Reaction of glucose acetal with acetic anhydride

The following problem was asked in JEE Mains 2020 (Sept 2, Shift 1), Consider the following reactions: $\ce{ (i) Glucose + ROH ->[dry HCl] Acetal ->[$x$ eq. of (CH3CO)2O] acetyl derivative }$ $\...
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1answer
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How to activate polystyrene with carboxyl group?

Is there a simple (that is one that requires few and not very exotic reagents) chemical reaction to "activate" or "functionalize" the polystyrene of a simple microtitre plate? In ...
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Why can't Grignard reagents react like Organolithium does (with acids)?

I'd read yesterday that Grignard reagents can't give ketones on reaction with carboxylic acids. It is because of the fact that Grignard reagent is a "super-base", and it will deprotonate the ...
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Will alkoxide ion in protic medium attack on double bond or carbonyl group?

I want to know what will happen next here- I thought that the alkoxide ion would attack the aldehyde to form a secondary alcohol, but apparently, as the two pi-bonds are in conjugation, so, the ion ...
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Arrange in order increasing reactivity towards nucleophilic substitution

Arrange the following compounds in order of increasing reactivity towards SN2 reaction According to me, the order should be P>Q>S>R as more hindrance should result in lesser reactivity but ...
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1answer
183 views

Electrophilic substitution on Borazole

As Borazole ($\ce{B3N3H6}$) is aromatic, it shows electrophilic aromatic substitution. Now, my question is when borazole undergoes electrophilic aromatic substitution reaction, on which atom does the ...
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6answers
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How does ammonium nitrate explode on its own?

I thought ammonium nitrate was an oxidizer that needed to be mixed with fuel to form a high explosive (e.g., ANFO). But apparently there have been accidental explosions involving just the "...
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2answers
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How do you know what elements will bond in a reaction? [closed]

I know all about the types of reactions, synthesis, decomp. etc., but when a bond is broken, how do you know that the free element will bond to another molecule? Is it because that element has a ...
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Reaction of Silicon Dioxide with Hydrofluoric Acid [duplicate]

I learnt that $\ce{SiO2}$(Silicon dioxide) doesn't react with any acid except $\ce{HF}$. So what is special about $\ce{HF}$? Why does only $\ce{HF}$ reacts with $\ce{SiO2}$ even though $\ce{HF}$ has a ...
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Reactivity comparison between benzaldehyde and acetaldehyde [duplicate]

One of my teacher says that $\ce{Ph-CHO}$ is more reactive than $\ce{CH3-CHO}$ in performing nucleophillic addition reaction because $\ce{—Ph}$ is planar and thus offers less steric hindrance as ...
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1answer
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Vinegar reaction [closed]

please could someone help me. I poured white vinegar over a small hole where ants where coming out in my patio steps. There was some sand on the step and it started to bubble and fizz. We have been ...
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1answer
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Beckmann rearrangement v/s dehydration of Oximes

In the above question, A is an oxime, which is then reacted with phosphorus pentoxide. Now, phosphorus pentoxide is both a dehydrating reagent and a reagent used for Beckmenn rearrangement, but which ...
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1answer
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Priority order of attack of grignard reagents on functional groups

Recently I was solving carbonyl compounds and I came across this. Is there some priority order, or logic behind why alcohol reacts first with Grignard reagent and then ketone. Whereas ester could've ...
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2answers
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Does K2CO3 react in minute amounts with glassware at higher temperatures?

At a temperature of $\pu{750 ^\circ C}$, $\ce{K2CO3}$ and $\ce{SiO2}$ react with each other in substantial proportions, forming $\ce{K2SiO3}$ and $\ce{CO2}$ in the process$\ce{^{[1]}}$. We all know as ...
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1answer
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How does copper rich “weld thru” primer protect iron / steel?

In the automotive industry, to protect steel which cannot be painted (e.g. the gap or seam between two sheet panels), a product known as weld thru primer is sometimes used. This is a coating of zinc-...
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Definition of “solution” [closed]

In my textbook “solutions” are defined as follows: Homogenous mixtures of two or more substances are known as solutions. Should the two substances always be non-reacting? The definition has no ...
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Order of Activating ability in Electrophilic Aromatic Substitutions

why is -OR less activating than -OH but -NR$_2$ more than -NH$_2$ ? One would expect that that alkyl groups increase the electron density via their inductive effect and thus make the group more ...
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Can ZrO2 be made fluoride resistant?

$\ce{ZrO2}$ has great properties, biocompatibility, chemical resistance, decent scratch resistance, great thermal resistance and refraction, but it could be better. It, like glass, will slowly react ...
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1answer
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Is silicon dioxide decomposition possible?

I was thinking about this, I made Gibbs free energy calculations and I can't figure out if $$\ce{SiO2(s) -> Si(s) + O2(g)}$$ is actually possible, even at a ridiculous high temperature.
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1answer
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Acidic strength of diethyl malonate vs ethyl acetoacetate [duplicate]

Which would be more acidic, diethyl malonate $\left(\ce{CH2(CO2Et)2}\right)$ or ethyl acetoacetate $(\ce{CH3COCH2OOC2H5})$ In the above compounds, I have marked the hydrogen which I think will be the ...
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Methyl group and acidic nature [duplicate]

After reading various answers here on StackExchange (like Why is the methyl group electron-donating via the inductive effect? and Strongest negative inductive effect group between trimethylammonium, ...
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Is there any elemental molecule which does not react well with anything but oxygen? [closed]

For example, phosphor reacts with oxygen but it also easily reacts with many halogens, metals, etc. Is there any elemental molecule that doesn't react well with almost anything but oxygen?
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1answer
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Do alkylhydroxylamines form N-nitrosamines?

Usual secondary amines can form N-nitrosamines with nitrosating agents, e.g., $\ce{KNO2}$, and are therefore forbidden in metalworking fluids. But can alkylhydroxylamines form N-nitrosamines with ...
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2answers
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Reaction between Copper nitrate and ascorbic acid

I am confused on the products of reaction between copper nitrate and ascorbic acid. When I searched this online, one of the reactions I got was: $$\ce{2Cu(NO3)2 + C6H8O6 <=> 2CuO + 4H2O + CO2}$$ ...
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1answer
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Can iodine replace other halogen as well?

While reading about halogen family I encountered the reaction: $$\ce{NaClO3 + I2 -> NaIO3 + Cl2}$$ I know that that the oxidizing tendency of halogens decreases down the group, so I think that the ...
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Reactivity of alkyl halides

I am unable to understand how to decide reactivity of alkyl halides based on inductive effect in a nucleophilic substitution reaction. I have 2 explanation for deciding. Consider 2 alkyl halides: (A)...
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Reactivity Order of Nucleophilic addition

My teacher asked me this question. "Compare the reactivities of acetaldehyde and trimethylacetaldehyde towards nucleophilic addition". I explained how trimethylacetaldehyde was sterically hindered and ...
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1answer
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Reactivity of Ammonium

I was going through some displacement reactions when this struck me: What is the position of the ammonium cation in the metal reactivity series? I can find other positive ions like carbon and ...
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1answer
108 views

Reaction of 1,2-diketones with periodic acid [closed]

$\ce{HIO4}$ can oxidise alcohols. But does $\ce{HIO4}$ undergo any reaction/act as oxidant with 1,2-diketones?
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Metalation of thiophene

So lately I've been studying the concerted metalation-deprotonation of thiophene and I came to the conclusion that the alpha positions of thiophene are the most reactive, which is why one of those ...
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2answers
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How much sodium hydroxide would it take to dissolve one tonne of bauxite? [closed]

Generally speaking what proportion of NaOH would be typically required to dissolve one tonne of crushed bauxite of average purity? Also are varying quantities required for gibbsite, böhmite and ...
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Why are Friedel Crafts reaction not possible for molecules less activated than benzene?

I know that Friedel Crafts alkylation reaction are not possible for aniline and phenol since they form complexes with Lewis Acids. But our teacher told us that Friedel Crafts reactions aren't possible ...
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3answers
686 views

Which is the most reactive metal: Caesium or Francium? [duplicate]

I searched on Wikipedia for reactivity series but it showed me Caesium as the most reactive metal. I know and have studied that reactivity increases as we go down the first group. Then shouldn’t it be ...
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1answer
128 views

Reactivity of different alcohols with NaNH2 and CH3I

Identify the final product (B) in the following reaction: I'm not sure how $\ce{NaNH2}$ and $\ce{CH3I}$ will react with the different types of alcohol present here. According to my solution,ether was ...
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Why is the top SN2 reaction faster? (Molecular Orbital Theory)

I'm having trouble understanding why the top SN2 reaction proceeds faster. I know that benzylic and allylic halides react faster in SN2 reactions than non-conjugated halides. I think it's because the ...
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1answer
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Reason behind more Reactivity of Unsaturated Hydrocarbons [closed]

My textbook says that unsaturated hydrocarbons are more reactive than saturated ones. But double and triple bonds are stronger than single bonds. What is the explanation for this?
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1answer
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Is the speed of sound the fastest rate that a chemical reaction can progress through a substance?

I read that a martensitic transformation can travel at the speed of sound in that material. Is that confirmed as being the fastest speed of a chemical reaction (transformation)?
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Is Gibbs energy minimized for processes at constant temperature are pressure only?

I've had this doubt for quite a while, This link https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Map%3A_Physical_Chemistry_for_the_Biosciences_(Chang)/04%...
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Is the activation energy always inversely proportional to the reaction rate?

When I obtained the activation energy using the Arrhenius equation for a 10-minute glowstick (rapid, rigorous reaction), it was almost 4 times that of a 12-hour glowstick (slow, mild reaction). ...
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2answers
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When aluminium is ignited in atmosphere, will it form only aluminium oxide or also aluminium nitride?

We know when lithium is burnt in air, it forms lithium nitride and lithium oxide. I am wondering if this applies to aluminium (other metals) also?
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1answer
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What are the properties of COₓ where x ≥ 3?

$\ce{CO_x}$ are part of the oxocarbon molecule class. Commonly known are $\ce{CO}$ and $\ce{CO2}.$ However, there are molecules in which $x$ is equal to or larger than $3.$ Those molecules are barely ...
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1answer
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Selectivity of diazo-coupling with p-amino phenol

I came across this question and I've been thinking about it since, without being able to find a convincing major product. This question is related to one I found on this site, Diazo Coupling reaction ...
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What is the order of acidity for hydrogens in primary, secondary and tertiary alkanes, alkenes, and cycloalkanes [duplicate]

The bond dissociation energies of C-H bonds in alkanes, alkenes and aromatic compounds decrease in the following order: primary > secondary > tertiary > allylic > benzylic. The weaker the bond, the ...
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3answers
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Why cobalt reacts favorably with nitrogen?

I used also iron, nickel, zinc, copper. However, cobalt gives the easiest and straight forward yield of nitrides (XPS and SAED verified). It is so easy to get cobalt nitride that I don't even have to ...
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1answer
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Why does the rusting process start from the bent/squeezed portion of iron?

I have noticed that the rusting of iron starts from the squeezed or bent parts of iron piece. I want to know what is the peculiar reason for the observation that rusting starts from bent or irregular ...
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What exactly is an 'activated' alcohol? Benzylic vs. Allylic vs. Aliphatic

I'm currently writing a report about the oxidations of various alcohols using different catalytic systems. In all papers it is stated that benzylic and allylic alcohols are "activated", while ...
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How to increase the conversion for the reaction between 2-acetylpyridine and diamine?

I tried refluxing in toluene using activated molecular sieves to absorb any water produced (didn't use Dean-Stark trap as it's a very small scale reaction). This reaction isn't going by changing the ...
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Why is the bottom white in a lucas test?

Consider this positive result from the Lucas test (adding $\ce{ZnCl2/HCl}$ to a tertiary alcohol): My question is quite straightforward but I can't find the answer. What is in the top layer (thin and ...
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109 views

What is the Reactivity order of alkali metals towards hydrogen?

I had read that reactivity of alkali metals towards oxygen is increasing down the group.But the reactivity of the alkali metals decrease down the group towards hydrogen. The reason given in my book is ...

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