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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Alkyl halide reaction

In the following the reaction , According to me the product should be compound (A) due to substitution reaction. But the product formed is the compound (B) , what could be the mechanism for the ...
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41 views

Is the variation in carbonation of soft drinks the variable that affects the effectiveness of the mentos reaction?

I went and bought a bottle of Fanta and some Mentos to replicate the famous youtube videos of the big fizzy reaction. The result was dismal, it weakly foamed up and dribbled over the edge. I tried ...
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6k views

What is the standard potential of carbon?

What's the value of standard potential of carbon? The hydrogen and Carbon are in the electrochemical series despite being non metals hydrogen has zero potential difference what about carbon?
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1k views

How can you predict a double displacement reaction with no precipitate?

Is it possible to predict a double displacement reaction between two ions where the products remain in aqueous solution? I see how you can predict precipitation reactions if you know whether the ...
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41 views

How to predict and measure excess values of reactivity ratios for copolymerization with three monomers?

I ask this question because I haven't found interesting literature on the subject and I would like to know if my way to think is good or pure bullshit. Also the question is quite long because I have ...
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105 views

Requirement of different reagents for bromination of different substituted benzene rings

Consider the bromination reactions of phenol and anisole. We know that the former can be brominated by aqueous bromine, while the latter requires the catalyst $\ce{FeBr3}$ instead. Our teacher said ...
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52 views

Do amides oxidize to double-bonds?

Do amides from primary or secondary amines ever oxidize to a double-bond on the nitrogen? For example, like from an $\mathrm{R \bbox[yellow]{\color{red}{-}}(NH)-(C=O)-R'}$ to an $\mathrm{ R \bbox[...
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135 views

Why is cyclopropylmethyl radical opening so fast?

Ring opening of the cyclopropylmethyl radical is reliable and fast, and so has been used as a radical trap and a radical clock. Could someone please explain what exactly makes this reaction so fast, ...
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386 views

Intermolecular forces between C and Na2O [closed]

I was trying to do an experiment called Pharaoh's Serpent and I read that the intermolecular forces between the $\ce{C}$ and the $\ce{Na2O}$ (formed in the thermal decomposition of the $\ce{NaHCO3}$) ...
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1answer
2k views

How can I predict whether a reaction will occur? [duplicate]

I'd like to know how can I predict if two substances will react. I already know that there's a reaction if one of the products is a weak electrolyte or a precipitate but that leads me to the question: ...
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86 views

Material for melting metal oxides

I am constructing an apparatus for high temperature, strong alkaline melts (metal melts), with extremely high oxygen rich environments. Here what I have so far. Iridium is a good candidate - is it ...
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149 views

How do you know if SN1 orSN2 reaction occurs when it is not so obvious? [closed]

For instance, when you have a primary halide with a weak nucleophile, do you think that the reaction mechanism would be SN1 or SN2, neither or would it even be both, like sometime leaving group can ...
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264 views

Why are copper, iron and lead so common in everyday use?

Copper, iron and lead are commonly used around the world in construction, for pipes and in electrical wiring. Why are these used instead of zinc and magnesium?
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What does the following sentence mean - “Li is least reactive but the strongest reducing agent among all alkali metals”

Isn't it contrasting? Is reactivity only concerned with kinetics of reaction ? PS - I am a high school student, probably I might be missing small detail!
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Are there any Endothermic Pyrophoric Substances?

I've recently been reading about pyrophoric materials, specifically as they relate to rocketry, and this made me curious if there are any substances which are the complete opposite of pyrophoric. ...
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481 views

Calcium reactivity vs electronic configuration

Calcium is an alkaline earth metal, so it is reactive. But, it has two valence electrons. Don't those two electrons fill up the first energy level? Isn't an atom with a full energy level considered ...
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3k views

Why does calcium oxide react with sulfur dioxide?

Which of the following compounds reacts with calcium oxide, $\ce{CaO}$? (a) $\ce{K2O}$ (b) $\ce{Na2O}$ (c) $\ce{SO2}$ (d) $\ce{MgO}$ I thought that since sodium is higher in the reactivity ...
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6k views

Why don't calcium chloride and sodium nitrate react?

$$\ce{CaCl2 + 2NaNO3 -> 2NaCl + Ca(NO3)2}$$ Why doesn't the above reaction occur? Does it have to do with the metal activity series or solubility rules?
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11k views

What determines whether a double displacement reaction will occur?

In normal displacement reactions, reactivity plays a large role and sometimes the reaction doesn't even happen. So is there anything limiting double displacement reactions? For example $\ce{2KI + Pb(...
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343 views

Can someone explain the unintuitive ordering in the metallic activity series?

I would understand it if the metallic activity series Li, Cs, Rb, ... Pt, Au corresponded to electronegativity or ionization energy. However, the way it is written, ...
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3k views

Is calcium hydroxide or potassium hydroxide more efficient at removing carbon dioxide?

In biology, we commonly use $\ce{KOH}$ in respirometers to remove carbon dioxide. A common test in chemistry to detect the presence of carbon dioxide is to bubble it through limewater, turning it ...
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941 views

Reactivity of Benzaldehyde between aldehydes [closed]

Are Benzaldehydes less reactive than aldehydes due to the -R Effect of the -CHO group present on the benzene ring?
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3answers
1k views

Is graphene a combustible material?

Various sources such as https://news.ycombinator.com/item?id=7679154 speculate that graphene will combust at higher temperatures. Is this true? Is the flash point/ temperature of combustion for ...
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1answer
630 views

Why does permanganate oxidation of 2-nitronaphthalene not form phthalic acid?

My teacher told me that among the following compounds only compound 3 will form phthalic acid when reacting with hot $\ce{KMnO4}$. I do understand why the other compound will not form phthalic acid.
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113 views

Derivation of Gibbs free energy formula

Okay, so I'm trying to derive an important formula which states that - ∆G(r) = ∆G° + RTln( RQ ) where ∆G(r) is the instantaneous rate of change of Gibbs energy with ...
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76 views

How could mass increase when sulfuric acid is added to calcium carbonate?

Context: I was doing an experiment in class that investigates the rate of mass loss over time when $\pu{20 mL}$ of sulfuric acid is added to $\pu{5g}$ of calcium carbonate. I did the experiment 3 ...
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1k views

Why does neighbouring group participation increase the rate of reaction?

I don't see any reason why the transition state of an SN2 reaction that happens after an internal nucleophilic group attacks(which is known as NGP) would be more stable. In fact, the nucleophilic ...
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157 views

Alkenes v/s Alkynes in two different reactions

Alkynes are less reactive towards electrophylic addition than alkenes. However, in case of catalytic hydrogenation, alkynes are said to be more reactive. Why? Also, if I want to add H+ as an ...
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152 views

Which of the following releases the smallest amount of energy upon gaining an electron?

$\ce{C}$, $\ce{Rb}$, $\ce{Ga}$, $\ce{Ge}$ I am confused in the sense that I don't know what it means by "released the smallest about of energy upon gaining?" would it be $\ce{Rb}$ because the shell ...
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1answer
600 views

Differences between alkyl halides and alkyl tosylates

What are the functional differences between alkyl halides alkyl tosylates? Both halides and tosylates are good leaving groups, yes. But is there chemistry that one will do and the other won't? Etc.? I'...
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604 views

Here are four observations of the reactions of four metals

Here are four observations of the reactions of four metals. Metal F and G react slowly with water Metal H displaces metal G from its chloride salt solution Metal E does not react with dilute acids ...
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1answer
40 views

What is the reason for more stable keto form to tautomerise to a less stable enol form?

In the mechanism of SeO2 I have seen that a more stable keto form first converts to a less stable enol form and then yields a diketone. I have seen many other reaction where the reactant converts to ...
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1answer
74 views

In a galvanic cell why does using a more reactive metal increase the voltage?

As the title says, why does using magnesium produce a higher voltage compared to using zinc when reacting with iron? Im having trouble figuring out why the voltage changes. magnesium+copper > zinc+...
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129 views

Does attachment of phenyl to an alkene increases its reactivity towards electrophilic addition reaction?

According to me phenyl should decrease the reactivity as its electron withdrawing nature destabilises the carbocation.
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2k views

What can be added to hydrochloric acid to make a gel or paste?

I have a bottle of brick cleaner containing 18-20% hydrochloric acid. What can I add to it to make a gel or paste without unwanted reactions? The application is still just cleaning bricks as the ...
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1answer
2k views

What factors affect the chemical stability of a compound? [closed]

My question is essentially about the factors that make certain atoms in certain compounds leave the compound they are currently in in order to bond with another atom/compound. For example, I've been ...
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1answer
297 views

Decomposing chemical compounds - Ease of Decomposition [closed]

Someone asked me a question, that which of the following can be decomposed chemically: Ammonia Iron Neon Hydrogen Fluorine My Analysis: At first attempt I answered Ammonia but changed it to 'I can'...
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28 views

Highly concentrated NaOH solution at high temperature vs borosilicate glassware and cellulose?

I've read here on stack-exchange that NaOH will react with glass through the following reaction: 4 NaOH + SiO2 ⤑ Na4SiO4 + 2 H2O I would like to briefly heat a highly concentrated NaOH solution to ...
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68 views

Will silicon dioxide react with hydrochloric acid?

I have the following equation, based on the reaction of $\ce{SiO2}$ with $\ce{HF}:$ $$\ce{SiO2 + HCl -> SiCl4 + 2 H2O}$$ I want to know if this reaction is indeed feasible, what conditions may be ...
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65 views

Why is the HOMO always lower in energy than the LUMO?

We say that increasing the energy of the $\ce {HOMO}$ of molecules increases their reactivity towards electrophiles while decreasing the energy of the $\ce {LUMO}$ increases their reactivity towards ...
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33 views

Is the water absorbed by sodium polyacrylate available to react?

I'm curious whether the water absorbed by sodium polyacrylate would react with alkali metals, or be trapped by the sodium polyacrylate.
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121 views

Metal reactivity with hot water VS HCL

Does being able to react with hot water take more metal reactivity than being able to react with HCl? To me, it seems like a metal would need to be more reactive to be able to react with hot water ...
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80 views

What's the chemical reaction involved when adding Caesium to water?

According to the Notting Hill and Ealing High School, the reaction of caesium $\ce{Cs}$ with water $\ce{H2O}$ gives the following equation, $$\ce{2Cs (s) + 2H2O (l) → 2CsOH (aq) + H2 (g)},$$ producing ...
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5k views

If the reactivity of group 1 elements increases down the group, why is this not the case for halogens?

I was wondering, as you go down a group, the atoms get bigger... This means that the electrons in the outer shell are further away from the nucleus, and so the attraction decreases and it is easier ...
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38 views

what makes an acid a strong acid or weak acid? [duplicate]

When my teacher referenced nitric acid as a strong acid, I thought it was strong because it donates more than one H+ per molecule, but then I saw the equation is $\ce{HNO_3}$ and it only donates one. ...
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1k views

Order of Reactivity of Halogens in Electrophilic Addition

Hello there. Here's a problem that appeared on one of my tests. What is the order of reactivity of halogens in electrophilic addition reaction via formation of cyclohalonium intermediate? I tried ...
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712 views

Why is fluorine deactivating while OH is not?

Both have 2p-2p overlap and oxygen and fluorine have similar electronegativities but OH is strongly activating while fluorine is deactivating
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403 views

Propylene Glycol as a water main anti-freeze

We are a young student science group looking for solutions to real world problems. We are currently working on ways to keep our city water mains from freezing in the winter. Our team is researching ...
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1answer
25 views

What effect does a quaternary ammonium compound have on uric acid (urine)

What effect does an Amine based quaternary ammonium compound have on urea/uric acid? Will an amine based quaternary ammonium product react with uric acid and get rid of the smell?
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1answer
42 views

why lithium is less reactive than sodium? [duplicate]

Lithium lies above sodium in a group and is also smaller in size. According to periodic trend reactivity decreases from left to right in period and down the group.