Everything posted by chenbeier
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How can I improve an electrolysis setup?
The question is what do you want to electrolyse? What is your aim? If you electrolyse salt NaCl then the Chloride will get a precipitate on the Lead as PbCl2, this decrease the yield down to Zero. Lead electrodes are only good in a car battery. You need inert electrodes. Copper bars coated with gold. Or platinum, Iridium or Ruthenium electrodes. It's a matter of money. Graphit is also a good choice, but will be consumed. Then the conductivity of your electrolyte has an impact. Concentration is a key factor. Surface of the electrodes! Influence of current density. Cathode small, Anode big. I
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Silicone remover / solvent suggestions ?
Correct.
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Silicone remover / solvent suggestions ?
But the the NaOH does.
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Ester Hydrolysis Activity
The first step is to add OH- at the carbonylgroup. Then kick out the alcoholate RO- and get Carbonic acid. In second step acid neutralize the alcoholate to alcohol an get the salt of the acid Water is not involved. https://share.google/images/HqwOst5o4mCSy05ex
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10.1
Translation When a triester reacts with three equivalents of sodium hydroxide (NaOH), each ester bond is broken by the action of the hydroxyl ion, which attacks the carbon of the carbonyl group. The result is three sodium carboxylate salts (which are soaps) and glycerol as the other product. In the process, the hydroxyl ion breaks the ester bonds, releasing the alkoxy group from glycerol, which is then protonated to form the final alcohol. After all the hydrolyses, the resulting products are glycerol and three sodium carboxylates (R–COO⁻ Na⁺). If the mixture is acidified at the end, these carboxylates are converted into free fatty acids. But do you have a question?
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Nobel price 2025
Information here https://www.nobelprize.org/prizes/chemistry/2025/press-release/
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Equilibrium: When Pressure is increased x2 is the every species multiplied by 2 ?
No, you get new concentrations of all 4 compounds.
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4-Ethyl-2-methylaniline: Why is C2H5 called Ethyl ? and Alternative names ?
No, but aniline is preferred as already mentioned.
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4-Ethyl-2-methylaniline: Why is C2H5 called Ethyl ? and Alternative names ?
No, C2H6 is called ethane, C2H5 is Ethyl, the naming is correct. Is possible, but Aniline is a trival name .
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How to find no. of bonds between C and O ?
Additionally oxygen is the group VI im the PSE. Means it is able to make 2 bonds to reach octet rule. Either 2 single bonds or one double bond.
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How to find no. of bonds between C and O ?
Oxygen is normally two bonded. In water it can bond to two hydrogen gives H2O. In organic compounds it can bond to one hydrogen and the other bond can go to carbon like in alcohols or phenols ROH. Also possible to bond to two carbons and form Ethers R-O-R'. It can also bond 2 times to carbon like in Aldehyde R-CHO or ketons R-CO-R' like your example 3- Pentanone. Both possibilities are given in carbon acid and their Esters. RCOOR' R =H, Alkyl or Aryl.
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How are 2 types of oxides possible ? N2 O3 , N2 O5
I don't know why you telling this. It has nothing to do how many combinations we have if two kind of atoms will connect each other.
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How are 2 types of oxides possible ? N2 O3 , N2 O5
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How are 2 types of oxides possible ? N2 O3 , N2 O5
The math is following Example hydrocarbons . They have infinite compounds. First group are alkane. CnH2n+2, n = €N0 With n =1 you get CH4 Methane And so one. There are more groups
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How are 2 types of oxides possible ? N2 O3 , N2 O5
Great you found more exotic NxOy compounds.
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How are 2 types of oxides possible ? N2 O3 , N2 O5
There are more N2O, NO, N2O3, NO2, N2O4 and N2O5 It's the matter of oxidation stage of nitrogen. It 1 from +1 to +5 possible.
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Separating & isolating reagents from product - ammonium acetate, ethanol, nitromethane, salicylic acid
For this reason it would be nice to know the yield of this reaction. Also I would suggested to add high amount of Nitomethane, so that the amount of the 5-Formyl salicylic acid is low a possible after reaction
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Separating & isolating reagents from product - ammonium acetate, ethanol, nitromethane, salicylic acid
You didn't got the mechanism The whole Nitromethan will be built in R-CHO + CH3NO2 => R-CH=CHNO2 + H2O Read about Aldol and the exchange to CH acide CH3NO2 instead of CH3CHO Ammonium acetate works as a buffer to keep pH stable.
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Separating & isolating reagents from product - ammonium acetate, ethanol, nitromethane, salicylic acid
The mechanism is a Henryreaction. Its a Nitroaldolreaction https://en.m.wikipedia.org/wiki/Henry_reaction
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Separating & isolating reagents from product - ammonium acetate, ethanol, nitromethane, salicylic acid
For this we need more information about procedure of the reaction, amount of reactants, mechanism, solubilities each components, yield, etc.
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Separating & isolating reagents from product - ammonium acetate, ethanol, nitromethane, salicylic acid
Nitro methane is a reactant and will be consumed. Ethanol is the solvent. The product is 5-(2 Nitro-Vinyl) salicylic acid. Not Salicylic acid itself.
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Separating & isolating reagents from product - ammonium acetate, ethanol, nitromethane, salicylic acid
Ammonium acetate will not crystilize. Check it's soloubilty.
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how linseed oil reacts with rosin to replicate old varnishes
Alizarin make a color by adding of aluminium ions.
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how linseed oil reacts with rosin to replicate old varnishes
It is nothing special. Abietic acid a resin acid is in rosin and linseed is only the solvent. After drying you get the varnish.
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Bronze and brass...
Aluminium of course will give a wrong result. Arsenic and lead has no impact on the result. The question is what kind of sample has Externet.