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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64 views

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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1answer
58 views

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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1answer
78 views

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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1answer
58 views

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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1answer
59 views

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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1answer
81 views

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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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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1answer
107 views

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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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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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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1answer
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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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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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1answer
84 views

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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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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1answer
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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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1answer
121 views

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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1answer
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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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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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2answers
81 views

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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1answer
62 views

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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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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1answer
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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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2answers
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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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1answer
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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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Silver Tarnish and Reactivity Series

I read that silver in the presence of hydrogen sulfide corrodes to form silver sulfide and hydrogen. $$\ce{Ag + H2S -> AgS + H2}$$ But in the reactivity series silver is placed much below hydrogen. ...
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1answer
56 views

Reactivity Dilemma of elements [closed]

While learning Periodic Properties, I stumbled upon a doubt regarding reactivity of elements of period 2 and period 3. (I am denoting reactivity, of any $X$ element as $R_{X}$.) For reactivity of $s-...
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HDPE vs PP for storing pure aldehydes

I know both HDPE and PP have at least some degree of resistance to aldehydes, esters and aliphatic hydrocarbons. I am concerned however about minute contamination over time of pure samples and so I ...
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2answers
310 views

Why aren't elements with two valence shell electrons stable?

We all know that hydrogen becomes stable by completing duplet and helium is stable since its valence shell has completed the duplet Still, other elements don't behave like that. I want to know that ...
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1answer
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Wiki’s explanation of the rate of chemical reaction [closed]

Could you please help me understand the Wiki’s explanation of the rate of chemical reaction? It says: the rate of the chemical reaction is directly proportional to the product of the activities or ...
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Chemistry and Plants [closed]

We're going to conduct a study to make corn husk fiber into a paper. Soda Ash is always used to extract the fibers from the husks, First question is there any chemical we can use aside from soda ash ...
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2answers
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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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2answers
365 views

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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Lucas test in the presence of EWG like -CN

Does the given compound give Lucas test? My teacher says due to the presence of a strong electron withdrawing group the carbocation formed is unstable. But I say if it undergoes $\mathrm{S_N2}$ ...
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1answer
43 views

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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0answers
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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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1answer
129 views

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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3answers
873 views

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
399 views

Electrophilic substitution on Borazole

As Borazole ($\ce{B3N3H6}$) is aromatic, it can show electrophilic aromatic substitution. Now, my question is when borazole undergoes electrophilic aromatic substitution reaction, on which atom does ...
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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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1answer
236 views

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
784 views

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
350 views

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
91 views

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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