Questions tagged [hydrolysis]
Hydrolysis refers to any reaction with water. For example, it may be said that ammonia hydrolyzes in water to produce ammonium ion and hydroxide ion.
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Neutralizing HCl acid, after protein hydrolysis [closed]
I have tried a soybean protein hydrolysis experiment (peptone preparation), as such:
200 grams defatted soy flour, was added to 1200ml of 1.5 N hydrochloric acid, stirred constantly, heated to around ...
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What is the difference betweem between Hydroboration Oxidation and Hydroboration Hydrolysis [closed]
I am studying Reaction in alkenes and alkynes. In there the term Hydroboration Hydrolysis has been used but has not been explained. I tried searching online but I could only find Hydroboration ...
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Is there any literature regarding the neutral hydrolysis of nylon 66?
I am working on a project for my thesis regarding the neutral hydrolysis of nylon 66 at high temperatures and pressures (265C,40 bar) however the only literature I could find relates to alkaline and ...
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Can copper hydroxide be formed as a byproduct of water electrolysis?
I was electrolysing water with a 12v DC power supply at about 3 milliamps, using copper wire for both my anode and cathode. The solution was about 17 grams of table salt in 750 milliliters of purified ...
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How to separate nylon 66 salt (hexamethylenediammonium adipate) into adipic acid and hexamethylenediamine?
After hydrolyzing nylon 66 in water (neutral hydrolysis) in a batch autoclave reactor, the resulting solution contains the organic salt hexamethylenediammonium adipate.
Is there any way to precipitate ...
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How does the branched structure of glycogen, increase its ability to be hydrolysed?
"Glycogen branching is essential because it allows for increased water solubility and several sites to break it down; this allows for easy and quick glycogen utilization when it is broken down&...
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Why is the hydrolysis constant of a salt of Weak Acid and a Weak Base so?
I read that the hydrolysis constant for a salt of a weak acid and a weak base is
Kh=Kw/(Ka*Kb)
Now I recall reading in the autoionization of water that Kw=Ka*Kb.
So, is there any relation between the ...
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Why are certain hot polycarbonate films stickier than others? Molecular weight? Hydrolysis?
In van der waals dry transfer, we pick up flakes of materials such as graphene using polymer films. The material is exfoliated onto an SiO2 covered wafer and picked off using the polymer film. It's ...
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Why does base aspirin hydrolysis work better than acid aspirin hydrolysis? [duplicate]
Why does base aspirin hydrolysis work better than acid aspirin hydrolysis?
I conducted an experiment and found that there was greater Salicylic Acid yield for the one I added base compared to the one ...
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Heating effect of alkaline earth metal chloride
Why does $\ce{MgCl2.8H2O}$ undergoes internal hydrolysis?
$$\ce{MgCl2.8H2O(s) ->[\Delta]MgO(s) + H2O + HCl}$$
while Calcium, Strontium, and barium undergoes dehydration and form anhydrous chloride.
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Why Hg doesn’t form hydroxide?
In my textbook it was written that if you put alkali solution into Hg2+ solution you won't get Hg(OH)2 but you get HgO.
And this is because Hg has high electronegativity and this makes polarization of ...
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What do you think is happening to aluminium in salt water with rusted copper?
I put some aluminium foil and rusted copper(namely a Japanese 10 yen coin) in saturated NaCl solution.
After some minutes tiny amount of small bubbles were observed on the surface of the foil.
After ...
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Aluminum nitride hydrolysis [closed]
I wanted to ask some reference about aluminum nitride hydrolysis in water.
Specifically I would like to know if there is the formation of radicals or of some other reactive species.
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Why is is that tellurium(VI) fluoride is completely hydrolysed but iodine(III) fluoride isn't, even in hot water?
Tellurium(VI) fluoride is completely hydrolysed into tellurium(VI) oxide and hydrofluoric acid, but iodine(III) fluoride isn't, stopping at the iodine(III) fluoride dihydroxide/hydrofluoric acid level,...
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Why doesn't an acid-base reaction occur in basic amide hydrolysis instead of nucleophilic acyl substitution?
In the reaction of Grignard reagent with a primary and secondary amide, nucleophilic acyl substiution doesn't happen. The reason given is that R- is a strong base as well as strong nucleophile, an ...
user121185
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How does the second hydrolysis of phthalimide work (hydrolysis of amide)?
In the hydrolysis of Phthalimides we can see two successive hydrolysis of "amides" see ChemLibre for a nice mechanism
This is interesting because normally (also according to ChemLibre) ...
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Is hydrolysis of acid chlorides still favored when the resulting acids cannot donate their protons?
For example, take the reaction:
MeCOCl + H₂O -> MeCOOH + HCl
Bonds broken: C-Cl + H-O -> 330 + 460 = 790 kJ/mol
Bonds formed: C-O + H-Cl -> 350 + 432 = 782 kJ/mol
I realize that BDE is only ...
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Deviation from (pseudo-) first-order kinetics during hydrolysis of sucrose
In an experiment we conducted at university, we studied the reaction kinetics of the acid catalyzed (with HCl) hydrolysis of sucrose to glucose and fructose (via the measurement of the polarization ...
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What makes a molecule lipopholic? [closed]
I know that non polar (Hydrophobic) molecules are usually lipophilic.
Is there a general explanation for this phenomenon, or does the explanation differ depending on the molecule itself?
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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} \...
user121185
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Old sodium hydroxide based drain cleaner become stony and brown, not hydrosoluble anymore
My drain was clogged and I used an old sodium hydroxide based drain cleaner to free it. The cleaner was quite old and inside it was brownish and monolithic, not a bunch of small white spheres anymore.
...
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Can I degrade PLA into something usable?
I have a lot of 3D printer waste and don't have a recycling machine for it.
As a side project, I was wondering if there is any way to degrade/compost/recycle it meaningfully.
I have my Uni's chemistry ...
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Tetrachlorophosphonium
I am aware that PCl3 and PCl5 both react with water. In these reactions, water breaks the chlorine atoms off of the phosphorus atom and hydroxyl groups take their place:
$\ce{PCl3 + 3H2O -> H3PO3 + ...
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Mechanism for hydrolysis of cyanohydrin [closed]
I know that acetals can be hydrolyzed with H2SO4 but I am not sure how benzaldehyde would be formed following hydrolysis of the cyanohydrin. When I searched online it I found answers suggesting that a ...
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Alkaline hydrolysis with KOH instead of NaOH. Why?
I really loved the series breaking bad. So I started reading about the science behind. I found this paper:
Harnisch, F., & Salthammer, T. (2013). Die Chemie bei Breaking Bad. In Chemie in unserer ...
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Comparing Rate of Hydrolysis of Acyl halides
In this particular question, my answer is (D) as steric hinderance is minimum there, but answer (B) was given due to the electron withdrawing (-M) effect of the nitro group.
Isn't steric hinderance ...
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How to remove starch from silicone ("Oogoo")?
Oogoo is an easy and cheap way of creating silicone rubber objects from a hand-formable putty. Basically: just mix silicone caulk with starch (I'm using acetate moisture absorbing silicone caulking ...
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Solubility of lead(II,IV) oxide
I was solving a question:
Which of the following liberate $\ce{O2}$ upon hydrolysis?
$\ce{Pb3O4}$
$\ce{KO2}$
$\ce{Na2O2}$
$\ce{Li2O2}$
The answer is no doubt $\ce{KO2}$ but if I am not wrong $\ce{...
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Grignard Reagent Facilitates Epoxide Opening
I have read from my textbook, that the opening of an epoxide ring with a strong nucleophile like a Grignard reagent, takes place from a less substituted side, with a higher SN2 character.
The acidic ...
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Why is the rate of solvolysis of t-butyl chloride lesser than that of 1-chloro-1-methylcyclohexane?
I came across a question regarding relative rate of solvolysis. According to the answer key:
My analysis:
As in all the three cases, the Cl atom is bounded to a tertiary carbon, hence, all of them ...
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Why is it advised to use neutral ferric chloride solution while performing confirmatory test for acetate ions? [duplicate]
The reaction of $\ce{FeCl3}$ with $\ce{CH3COO-}$ is
$$\ce{3Fe^{+3} +6CH3COO- +H2O<=> [Fe3(OH)2(CH3COO)6]^{+} +2H^{+}}$$
Recently I read that a solution of $\ce{FeCl3}$ hydrolyses very quickly to ...
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How is this reaction not a decomposition reaction? And are all disproportionation reactions decomposition reactions?
When I asked my teacher whether all disproportionation reactions are decomposition reactions, he stated the following reaction:
$$ \ce{4 KClO3 -> 3 KClO4 + KCl} $$
and said that this isn't a ...
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Are all hydrolysis reactions non-redox reactions? [closed]
Are all hydrolysis reactions always non redox reactions? For example:
$$\ce{N2O3 + 2H2O -> 2HNO2}$$
The main reason I say that this statement is correct is because oxygen and hydrogen generally ...
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What are the gaseous outputs of electrolysis of Water along with NaOH or KOH?
Theoretically electrolysis of water yields Hydrogen and Oxygen in gaseous form.
But to enhance conductivity we have to add an electrolyte like $\ce{NaOH}$ or $\ce{KOH}$.
Does this produce any other ...
user108973
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Cyanide hydrolysis; could it yield an oxime?
The mechanisms for both acid and base catalyzed hydrolysis of nitriles are clear;
(With the subsequent deprotonation from the hydroxyl) and
(Source)
In both cases, the hydroxyl adds to the carbon ...
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On the stabler tautomer in amide-imidic acid tautomerism
In the section on acid-catalysed hydrolysis of nitriles, this webpage has the following line of reasoning;
...the more stable amide tautomer predominates the (following) equilibrium.
(credit)
How ...
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Why does ester hydrolysis occur in basic medium
Ester hydrolysis occurs in basic medium and this is the medium which is usually preferred for the same. But I am facing a very fundamental doubt and not able to understand the reason.
Ester Hydrolysis ...
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Mechanism of hydrolysis of acyl chlorides
The following mechanism for acyl chloride hydrolysis was given by my professor :
However I do not understand why in the second step, oxygen has a partially negative charge, should it not gain a ...
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Why is the hydrolysis of ATP to AMP more energetic than the hydrolysis of ATP to ADP?
I am confused as to why the hydrolysis of ATP to AMP and pyrophosphate is more energetic than hydrolysis to ADP and inorganic phosphate, especially since pyrophosphates are more unstable than ...
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Possibility of removing two water molecules from glycerol
Not a chemist, but from a chemical formula perspective, how hard would it be to create acetone by acidifying glycerol?
$$\ce{C3H8O3 + 2 H+ <=> C3H6O + 2 H2O}$$
Has anyone ever heard of this ...
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Why is Ag+ not hydrolysed?
Usually, strong acid anions and strong base cations don't get hydrolysed. But I've noticed through some questions that $\ce{Ag^+}$ doesn't seem to get hydrolysed, why is that? Is there any concept ...
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What exactly is hydrolysis? What are the products of hydrolysis of aluminium?
I came across three reactions while studying p-block compounds in inorganic chemistry.
$$\ce{2Al + 2NaOH + 6H2O -> 2 Na[Al(OH)4] + 3H2} \label{eq:1} \tag{1}$$
$$\ce{Al2O3 + 2NaOH + 3H2O -> 2 Na[...
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Hydrolysis of one mole of peroxydisulphuric acid with one mol. of water produces?
I am having trouble in this question:
Hydrolysis of one mole of peroxy disulphuric acid with one mole of water produces :
a)two moles of sulphuric acid only
b)two moles of peroxymonosulphuric acid
c)...
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salt hydrolysis and pH calculations
I am a high school student and I am very confused in salt hydrolysis
My confusion is that: when we talk of hydrolysis of salt of weak base and weak acid, we internally assume the degree of hydrolysis ...
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What would be the product of this reaction?
A 3 membered carbon ring with a double bond to oxygen from one carbon and a double bond between the remaining carbon with a methyl group attached to one of the carbon is made to undergo acid catalyzed ...
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Why does acid hydrolysis of glucose-1,6-bisphosphate produce glucose-6-phosphate and not glucose-1-phosphate?
A paper I found details treating glucose-1,6-bisphosphate with 6M HCl to produce glucose-6-phosphate. I'm curious why glucose-1-phosphate (and then even plain glucose) isn't formed instead?
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Aspirin Hydrolysis at pH 2
Conducting an experiment, I found that very little salicylic acid was evolved performing hydrolysis at $\mathrm{pH \ 2}$ and at $\pu{45 ^\circ C}$. In fact, far more salicylic acid was evolved at $\...
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Hydrolysis of Magnesium Carbide
I came across a question in which the following reaction was taking place:
$$
\ce{Mg4C3 + H2O -> CH3CH \bond{#} CH}
$$
Each $\ce{Mg}$ atom must be present in a +2 oxidation state, thus the total ...
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What are the properties of water in glaciers? [closed]
Does water from glaciers have many minerals (hard water) or would it be considered pure or distilled water?
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Sodium Sulfate or Sodium Carbonate for electrolysis in water
I am not a chemist but I have a question regarding electrolytes in electrolysis.
I have done a lot of reading but cannot find the answer I'm looking for regarding Sodium Sulfate (or Sulfide)
I intend ...
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