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1answer
27 views

Can a metal which contains impurity of another metal that is more reactive than itself be electrorefined?

So I know that cathode is made of pure metal and anode of impure. For example take Cu. Cu will be oxidised to Cu+2 at anode and will deposit at cathode. But now if it contains impurity of , let's say, ...
0
votes
3answers
54 views

A problem regarding solubility and concentration

A solution is $\pu{0.10 M}$ $\ce{Ba(NO3)2}$ and $\pu{0.10 M}$ $\ce{Sr(NO3)2}$. If solid $\ce{Na2CrO4}$ is added to the solution, what is the $\ce{[Ba+]}$ when $\ce{SrCrO4}$ begins to precipitate? $\...
-1
votes
0answers
15 views

The State and the Bonding nature of compounds in an aqueous solution

Consider a redox equation as follows : Mg(s) +2HCl(aq) -> MgCl2(aq) + H2(g) Now, there are 2 aqueous compounds as shown in the reaction below: HCl and MgCl2. Due to the nature of their state being ...
-1
votes
0answers
54 views

Positional isomers of methyl bicyclo[4.4.0]decane

How many positional isomers of methyl bicyclo[4.4.0]decane? As far as I know, positional isomers are the structural isomers which can differ only in position of substituent like pentan-1-ol and its ...
-4
votes
2answers
34 views

Acid boric preparation [closed]

Is there a simple reaction to yield boric acid ($\ce{H3BO3}$) from boron trifluoride ($\ce{BF3}$)?
-1
votes
0answers
48 views

In 1,2 dichloro 4 nitro benzene ,through addition substitution reaction why para product comes instead of meta? [closed]

1]1in the mechanism if the nucleophile attacks at meta position then the negative charge comes on the para position so it should be the major product right?as NO2 decreases the negative charge on it....
2
votes
0answers
20 views

Cause of photoluminescence in CaV2O6

I had prepared the sample of Cav2O6 using solid-state reaction route. I had done XRD, SEM-EDS which all matched with the previous results. There was something strange when I did the PL analysis. I saw ...
-3
votes
0answers
34 views

Why does KClO3 decompose to become KCl + O2? [closed]

With my question, I understand that in decomposition AB--> A+B, but in this case, does that mean KCl acts a a single substance? Why is KCl not broken down in K and Cl2?
2
votes
1answer
54 views

Mechanism of acid-catalyzed Robinson annulation?

My professor posed my organic chemistry class a challenge problem for bonus points and I've been racking my brain over the last three days trying to work it out and I want to know if my solution is ...
-3
votes
0answers
33 views

dark matter black body same thing? [closed]

the dark matter is anknown material and black body is sort of to bat in his case we know his chemical reaction . My question is, will it be so an usul? because so far frome what i read it's Should ...
-1
votes
0answers
35 views

Why is enthalpy U+PV and not U-PV? [duplicate]

If enthalpy is the sum of internal energy of the system and the PV work done to establish that system then the system should have used some of it's internal energy to do the work to establish that ...
-1
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0answers
19 views

Different intermolecular forces between solids and liquids [closed]

Look I don't know if it is wierd question but it just randomly came in my mind..so the question is: We have always learnt that solids have stronger attractive intermolecular forces than liquids so ...
-2
votes
0answers
8 views

What is the chemical equation for phytate breakdown? [closed]

Need some confirmation on this one. I’ve looked up papers and believe I have a grasp on it, but I am getting variation in the equation with different reactions being shown and I could use some help ...
-4
votes
0answers
14 views

Chemical evolution in entropy and chemical spontaneity? [closed]

My teacher isn’t available for me to ask so I was wondering if it was possible to explain Chemical Evolution with entropy and chemical spontaneity in consideration.
-2
votes
0answers
31 views

What could cause Cr to achieve a full 4s orbital (4s²)?

I understand that in its neutral ground-state, the electron configuration of Cr is [Ar] 3d⁵4s¹, and I understand why this is the case due to the Aufbau principle and the lower energy state that is ...
1
vote
0answers
29 views

Splitting of ethyl ester proton NMR

I synthesised a dihydropyridine molecule today and recieved my NMR. I am wondering where the complex splitting for the 7 and 22 protons is coming from. My spectrum: 1.26ppm, triplet, 6H 2.33ppm, ...
-3
votes
0answers
14 views

Reduction and oxidation of benzenoid in oznolysis of benzen [closed]

When benzen react with ozone it form ozonoid . Ozonoid with Zn/H20 form carbonyl compounds and with peroxide form carboxylic acid . Is there any change when it reacts with only h20 ?
-1
votes
0answers
20 views

Attaching fluorophores to spherical gold nanoparticles?

I am a biologist, in need of some fluorescently labeled spherical gold nanoparticles (5nm) for imaging. Off-the shelf, the fluorescently labeled nanoparticles are extremely expensive. I suspect that ...
-5
votes
0answers
15 views

What is the cost of per atom of aluminum? [closed]

I have an 8cm x 8cm square of aluminum foil. It is cut from a roll measuring 1520 cm x 30.4 cm and costing $2.99, I have to find the cost per atom of this sheet. The Mass of my 8cmx8cm is 0.32g. I am ...
1
vote
1answer
17 views

How to draw a reaction coordinate diagram for SN1 mechanism?

How would you draw a reaction coordinate diagram for an SN1 mechanism with the following conditions? each step in the mechanism (there are 2 steps) is favorable the second step of the mechanism is ...
-1
votes
0answers
11 views

Identifying sugars using Benedict's Solution [closed]

Would it be possible to figure out which sugars are being reduced when performing Benedict's test? For example, I want to test for the presence of glucose in a solution. Would this be possible?
-4
votes
0answers
17 views

Homework question: how are ceramic ionity crystals kept together? [closed]

The question is: How are ceramic ionity crystals kept together? The three different answers to choose from: Atom pairs of different substance share one electron pair. Ionity pairs of the same ...
-1
votes
0answers
22 views

Fe(II) NMR of deoxy-hemoglobin

As the article mentions, Fe-NMR is generally never carried out because of its low sensitivity. However, the article also says Fe(II)-NMR is possible because Fe(II) is sufficiently diamagnetic. Are ...
1
vote
0answers
31 views

What do γ (gamma) and λ (lambda) mean in organic chemistry?

From the Wikipedia entry on Cyhalothrin: Pyrethroids such as cyhalothrin are often preferred as an active ingredient in agricultural insecticides because they are more cost-effective and longer acting ...
2
votes
1answer
312 views

Why are square planar molecules drawn from the side plane as opposed to the top plane?

Simply put, why can't you draw square planar molecules top down (so you don't have to use depth bonds)?
0
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0answers
41 views

Influence of Vinegar on Tap Water pH [closed]

Given tap water with a pH=7.6, I would like to know how much Wine Vinegar (6% acidity) I need to add in order to reach any target ph=X, e.g. ph=7. My purpose is to make Vegetable Milk (from Rice, etc.)...
-2
votes
0answers
13 views

How to calculate the enthalpy change for the oxidation of ethyne C2H2? [closed]

Given the following enthalpies of the reactions, calculate the enthalpy change for the oxidation of ethyne (C2H2). C2H2(g) + 5/2 O2(g) → 2CO2(g)+ H2O(l) C(s) + O2(g) → CO2(g) H = -394 kJ/mol 2C(s) + ...
0
votes
0answers
17 views

change in enthalpy using enthalpy of formation data [closed]

I had this question in a formative test few months a go, I got it right but now I doubt my reasoning, the question asked for the change in enthalpy so I took the sum of the enthalpies of formation (...
0
votes
1answer
39 views

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 ...
0
votes
0answers
49 views

Partial molar volume of binary mixture

A 2% (weight %) solution of a salt with Mr = 190.6 g mol-1 was prepared at 25 0C. The density of the prepared solution was 1.00926 g cm-3. The density of water at 25 0C is 0.99707 g cm-3, and the ...
0
votes
1answer
37 views

Cp - Cv for a real gas

I am trying found a relation between cp - cv for a real gas. I know how to calculate for an ideal gas, but when I try to do the same for a real gas I stopped at some point and I don't know how to ...
0
votes
0answers
20 views

Existence of gem-diols [duplicate]

In the mechanism for Reimer-Tiemann's reaction, I was told that two alcohol substituents on the same carbon atom are unstable, and this is why salicylaldehyde is formed. In fact, this is not the first ...
0
votes
0answers
25 views

How to make zinc acetate solution [closed]

Please, I got 1 kilogram Zinc Acetate Dihydrate. I tried to make a solution with 1 liter boil water in 1 teaspoon (5-6 gram) of that zinc acetate powder. As this powder has about 30% elemental zinc so ...
0
votes
1answer
24 views

Catalyze dehydration of formic acid [closed]

I know that formic acid will dehydrate upon heating to 100°C (under normal pressure) or adding sulfuric acid. What other catalysts can be used to induce this reaction?
0
votes
1answer
13 views

Trying to find an experiment on the equilibrium of carbonated soda [closed]

I have to come up with an experiment which explores how the effects of one of the following: temperature, concentration or pressure, affect the equilibrium of the reaction of water and carbon dioxide(...
-2
votes
1answer
27 views

Identifying electron donating or withdrawing groups

I am studying organic chemistry and have been confused on whether some groups are electron donating or withdrawing. Is there any particular rules that I can use to identify whether a group is electron ...
-2
votes
0answers
26 views

How to calculate the equilibrium constant from absorbance datas [closed]

Help me please for manual solution. The chelate CuQ22–(aq) formed by Cu2+(aq) and the complexing agent Q2–(aq) absorbs at 480 nm. When the concentration of chelating agent Q2–(aq) is five times in ...
2
votes
2answers
77 views

Calculating change in state function following different paths

in thermodynamics, we learn that change in state function is independent of the path/process, and thus we can conveniently pick any arbitrary path that allows easier calculation. I'm TA'ing a class ...
-4
votes
0answers
30 views

Are aqueous solutions soluble in water?

Are already existing aqueous solutions (eg. NaCl in water) soluble in water? Since the solute is already broken up into ions, it shouldn't be, right?
2
votes
0answers
34 views

Double Bond Geometry

The double bond at position '4' appears to be showing a 'E' geometry because the priority 1's are on opposite sides of the double bond ie top-left of bond4 is '1' (because Oxygen > Carbon)); bottom-...
-2
votes
0answers
20 views

Stereochemistry Absolute Configuration direction confirmation question

I need confirmation whether the absolute configuration for Chiral Centre "3" is a 'R' or 'S'. I think that it's a 'S' because NH2 is priority1, The OH side priority2 and the CHCH3CH3 side is ...
-4
votes
0answers
31 views

Are there any combustible chemicals that will create a whole through a plastic tub, carpet, plywood, and a ceiling tile overnight [closed]

Found a metal safe with combustible liquid inside. Would not eat through linoleum so thought it would not effect plastic. The next morning I found out that it made a hole through to the floor below(...
-3
votes
0answers
14 views

Application of enthalpy of hydration [closed]

I'm doing an experiment about how a variable affects the enthalpy of hydration of compounds, but don't know the significance of this. Would there be a reason for wanting to achieve higher or lower ...
-2
votes
1answer
19 views

Solubility of d -block metal salts

Which d-block salts are usually insoluble in water at room temperature? I know that generlly sulphides , hydroxides and oxides of d -block metals are insoluble but I want to know more acidic radicals ...
-4
votes
0answers
59 views

Molar volume of salt [closed]

A 4% (weight percent) solution of a salt with Mr = 189.6 g mol-1 was prepared at 25 0C. The density of the prepared solution was 1.00926 g cm-3. The density of water at 25 0C is 0.99707 g cm-3, and ...
-3
votes
0answers
23 views

Mixing Isopropyl rubbing alcohol & Hydrogen Peroxide together to disinfect [closed]

I just had Covid and want to disinfect my house without using the harsh toxic chemical disinfecting cleaners. I know rubbing alcohol as well as hydrogen peroxide have both been recommended but I want ...
-1
votes
1answer
43 views

Why do certain compounds dissolve in oil? Why do some types of compounds dissolve in oil, yet not water? [duplicate]

Sorry if this is an obvious answer. I tried rewording this question every way I could, but search engines came up with nothing- they all skirted around this exact question. Why do certain compounds, ...
0
votes
0answers
32 views

How is temperature constant in enthalpy change formula?

I have learnt that temperature sort of indicates the internal energy of a system, or at least this is my intuition. So if temperature is constant, then internal energy is constant as well. But in the ...
-3
votes
0answers
24 views

pH of the Highest Basic Substance [closed]

What is the pH of ortho-diethynylbenzene dianion? If I am correct, it is the most basic substance (superbase)
-1
votes
0answers
39 views

Does aspirin at all react with Ethanol? [closed]

Can acetylsalicylic acid react with ethanol, either directly, or indirectly, in any amounts? Can it and/or salicylic acid form esters with Ethanol? Wikipedia more or less indicates that aspirine would ...

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