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4 views

Acid ans Salt reaction

what is the name given to the reaction between acid and salt example, Hydrochloride acid react with Calcium carbonate salt
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0answers
6 views

Hydrogenation of Synthetic Motor Oil

I'm looking into adding hydrogen to my vehicle's air intake as a method of hybridization. Obviously, this could go badly for a number of reasons... But my primary question here is how could this ...
-4
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0answers
18 views

Is water acidic because its a non metallic oxide? [closed]

It is said that non-metallic oxides are acidic in nature and H20 is also a non-metallic oxide so will we consider water to be acidic? Even though its pH is more than 7
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0answers
19 views

Order of stability of allotropes of phosphorus

I want to know the stability order of allotropes of phosphorus. Upon searching I realised that two types of stabilities are defined in their case kinetic thermodynamic But I am somewhat confused (...
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2answers
39 views

Choise of solvent for extraction

In the synthesis of (S)-Diphenyl(pyrrolidine-2yl)methanol, I need to extract the product using an organic solvent and water. Which organic solvent is the most suitable in this case? Ethyl acetate: I ...
-3
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0answers
35 views

If M^2+ is radioactive with alpha emission, then the correct order of radioactivity of following substances is? [closed]

If $\ce{M^2+}$ is radioactive with alpha emission, then the correct order of radioactivity of following substances is? $\pu{1g}$ $\ce{MO}$ $\pu{1g}$ $\ce{MSO4}$ $\pu{1g}$ $\ce{MgCl2}$ $\pu{1g}$ $\ce{...
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0answers
17 views

Yield of possible products from acid catalysed hydration of an alkene with a phenyl group

Here, (b) is the major product due to formation of tertiary conjugated carbocation. My questions are: 1- Will a kinetically favoured (minor) product (c) form? 2- Is product (d) possible due to high ...
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1answer
77 views

Huckel's rule and aromaticity

I am learning to determine whether a monocyclic conjugated alkene is aromatic or anti-aromatic or not. question 1: cyclobutadiene: according to Huckel's rule, 4 * 1 = 4, it should be antiaromatic, ...
2
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1answer
48 views

XPS/EDS vs FTIR/Raman

So I have been studying the four methods the past couple of weeks. To my understanding, XPS is a very surface-sensitive technique. It can give information about the composition of the surface but also ...
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0answers
39 views

Why is the overall change in entropy of Photosynthesis positive?

Net Reaction: $$\ce{6CO2(g) +6H2O(l) -> 6O2(g) + C6H12O6(aq)}$$ Why is the overall change in entropy positive, over the series of reactions that make up this process?
2
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1answer
126 views

Electrophilic substitution in Borazole

As Borazole (B3N3H6) is aromatic,it shows electrophilic aromatic substitution.Now,my question is when borazole undergoes electrophilic aromatic substitution reaction,on which atom does the ...
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1answer
57 views

What exactly is lattice energy

I was going through my chemistry textbook when I encountered this very disturbing explanation on lattice energy.In this text, it seems like the writer is implying that for an ion pair in the gaseous ...
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0answers
12 views

antibody-drug conjugation calculation

Can you please tell me how to calculate the number of moles of drug needed if I want to react 20 molar excess, mol wt known of the drug to an antibody whose volume and concentration is known ?
0
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1answer
49 views

Which one of the two is the stronger base: methoxide ion or hydroxide ion? [duplicate]

If we consider the experimentally determined pka values, it looks like hydroxide ion should be the right answer but in many books it has been mentioned that all alcohols are less acidic than water ...
0
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0answers
43 views

Applying Bohr's model for Helium atom

Consider the following atomic model for Helium. Helium contains 2 electrons revolving in circular orbit around the nucleus,in such a way that there is minimum possible repulsion between them.Calculate ...
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1answer
35 views

Kinetics of inversion of cane sugar

Question 1 The formula for concentration of cane sugar as a function of time is given by $$k = \left(\frac{2.303}{t}\right) \log\left[\frac{\alpha(0) - \alpha(\infty)}{\alpha(t) - \alpha(\infty)}\...
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0answers
9 views

6463-T6 aluminum oxidation and role of water and ethanol vapor

Our issue...in a nutshell: We use 6463-T6 aluminum as a sampling "cell" for analysis of water and ethanol vapor mixtures in both wet and dry gas variations. As I understand it, the ...
19
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6answers
3k views

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 "...
0
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1answer
58 views

How to get or understand a sample in chemistry without knowing its chemical name or compound or formula [closed]

How to get or understand a sample in chemistry without knowing its chemical name or compound or formula? I was thinking about whether there is a way to understand what the chemical compound sample ...
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0answers
39 views

Why does Tin form Sn+2 in an acidic medium, not sn+4? [closed]

As sn+4 is more stable than sn+2 it should form sn+4! Answer of this question is 2
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0answers
17 views

Lewis structure of R-COO-Na+ [closed]

I am studying Lewis structure and I have a question about an excercise. The question asks what is the Lewis structure of $\ce{R-COO^-Na+}$. I don't know how to draw it correctly.
1
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2answers
57 views

Can I use calcium chloride instead of sodium sulfate as drying agent?

In the synthesis of N-ethoxycarbonyl L-proline methyl ester from L-proline and ethyl chloroformate, I dry the organic phase over sodium sulfate. Can I use calcium chloride instead of sodium sulfate? I ...
5
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1answer
89 views

Can I use potassium acetate instead of potassium carbonate?

In the synthesis of N-ethoxycarbonyl L-proline methyl ester from L-proline and ethyl chloroformate, I use $\ce{K2CO3}$ to neutralize $\ce{HCl}$. Can I use $\ce{CH3CO2K}$ instead of $\ce{K2CO3}$? I ...
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0answers
64 views

How many colors does human blood have? [closed]

Question Which of the following statement(s) is/are correct regarding human blood? A) It exists in the different colors B) It has both paramagnetic and diamagnetic characters C) The $\ce{Fe^2+}$ ion ...
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0answers
48 views

Why citric acid is called antioxidant but it causes iron oxidation? [closed]

Is antioxidant and reducing agent is the same? If not, what's the difference between them?
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0answers
44 views

Poisoned catalysts

CaCO3 in rosenmund reduction, lead in Lindlar's catalyst, or steel in Raney nickel all act as poisins but the carbon in Pd/C is just for support. How do the others affect the catalytic activity but ...
-1
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2answers
55 views

why does the partial pressure not change?

Suppose I have the equilibrium in a closed container at constant temperature: $$\ce{2CaSO4(s) -> 2CaO(s) + 2SO2(g) + O2(g)}$$ If the volume of the container is halved, the reaction should move ...
0
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1answer
23 views

How to bond polymer to polymer (TPU on PMMA)

I wanted to bond TPU films to PMMA slab. I have tried thermal bonding but it is was not practical(I do not know why?). Can anyone please give me a method to bound them? Thanks
1
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0answers
32 views

why does lithium fluoride have a higher lattice energy than lithium iodide?

Based on my knowledge, lattice energy is proportional to the multiplcation of the charge of the ions, divided by the sum of the radius of ions, as follows. Since iodide has a larger radius than ...
0
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1answer
40 views

Thermodynamics of chemical reactions “at constant pressure”

Chemical reactions occur at constant temperature and pressure. Consider a gaseous, equilibrium reaction: $\ce{2NO2(g) <=> N2O4(g)}$. Most questions/textbooks formulate such questions by stating:...
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0answers
19 views

Is the width of a Soxhlet Condenser Inherent to its Function?

Soxhlet extractors are often coupled to a specifically designed condenser with a very large lower joint. Is this inherent to it's function as a condenser in the apparatus or only because the Soxhlet ...
-4
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0answers
23 views

Rate law expressions [closed]

Question For the reaction, $$\ce{2NO(g) + 2H2(g) -> N2(g) + 2H2O(g)}$$ The rate expression can be written in the following ways: $\frac{\mathrm{d}[\ce{N2]}}{\mathrm{dt}} = \mathrm{k_1}[\ce{NO}][\...
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0answers
66 views

Pyridine synthesis by tin(II) chloride reduction of 5-nitronorbornene

What is the reaction mechanism here? I guess the $\ce{SnCl2}$ reduces $\ce{NO2}$ to $\ce{NH2}$ but then what happens?
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0answers
25 views

Using Quantum Mechanics to understand the size of an atom [closed]

What is the quantum mechanical approach of explaining the fact that: "The size of the atom increases when a new shell is filled" ??? I mean how do you explain this phenomenon using ideas of ...
-2
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0answers
31 views

Effect of resonance on electron density in methyl vinyl ether

I am an 11th grade student. I am a bit confused in organic chemistry (General Organic Chemistry). I am unable to understand that whether oxygen wants to disperse its electron density or increase its ...
1
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0answers
32 views

What happens when Isopropyl alcohol expires?

My isopropyl alcohol is expired. What happens when it expires? Does it break down into something else? Can I still use it to clean or sanitize?
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0answers
19 views

What are the possible reactions between isopropyl alcohol(2-propanol), hydrochloric acid, magnesium, and tin(II) chloride(stannous chloride)?

Had an accidental discovery. Produced a mixture of hydrochloric acid in water (roughly azeotropic) with a moderate amount of tin(II) chloride dissolved within, then added several mL of that to 100mL ...
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2answers
30 views

Analysing reversible processes

A reversible process is a process in which the system is in mechanical and Thermal equilibrium with its surroundings. Consider a simple thermodynamic system: a gas in a vessel, with a piston (free to ...
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0answers
23 views

chemically extract sodium from a food for health purposes [closed]

Spirulina is a consumable algae with some benefits and only one downside I have noticed. according to my research 2,300 mg of sodium a day is way too much. 10 OZ. of spirulina contains just under 3,...
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2answers
34 views

Thermal equilibrium in reversible processes

In whatever resources I have consulted to study reversible thermodynamic processes, a common statement seems to be : The system and surroundings (if the boundary allows) are in mechanical ($P_{sys}=...
2
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1answer
40 views

Why is PLGA so expensive in comparison to PLA?

A Google search has lead me to believe that PLGA goes for anywhere between 8 USD and 100 USD per gram. Meanwhile, for PLA (3d printer grade), prices float around 50-100 USD per kilogram. I understand ...
-2
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0answers
34 views

melting point of organic compounds [duplicate]

Why is the melting point of 1,4-dichloro benzene more than that of 1,2-dichloro benzene? According to me the latter has more dipole moment,so it should result in more molecular interactions and hence ...
1
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0answers
43 views

Is melting aluminium in the presence of carbon dioxide desirable?

So aluminium cans melting is prone to formation of aluminium oxide due to presence of oxgygen and thin sheet of aluminium (large surface area). To mitigate this I can design a cruicible which is ...
1
vote
1answer
38 views

Conductivity of molten or aqueous salts

If there is a 1M aqueous solution of 1 liter NaCl (aq), and the molar conductivities of the solution and the chloride ions were found to be $x$ and $y$ respectively, is it accurate to say that the ...
0
votes
2answers
57 views

rate of reaction and RDS

An article on Khan-Academy, states the following: The overall reaction rate is determined by the rates of the steps up to (and including) the rate-determining step Here, it says that rate is ...
-1
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0answers
62 views

Is nitrogen a stereocenter in amides? [closed]

Consider $\ce{CH_3CONH-CH3}$. Is the amide nitrogen a stereocentre? I know 2 factors that can affect the chirality: amine inversion and resonance. I don't know if they apply here.
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0answers
30 views

Can anyone explain the reaction mechanism and products of Kolbe's electrolysis? [closed]

In my textbook it is written that Kolbe's electrolysis converts an alkyl acetate ion into an alkane, alkene and an ester, can anyone explain the mechanism behind this synthesis?
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0answers
43 views

Remembering Chemical formula [closed]

How do you all remember the name of chenical formula of Glucose, Lime, Vinegar ... etc. becasue these substances have big big chemical formula. So, How do I remember their chemical formula?
2
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0answers
43 views

Illustrating moles with sand grains, Are there more moles of SiO2 in a grain than moles of sand on the earth

I have been trying to understand the scale of atoms, thinking about sand grains as an example. With approximately $7.5\times10^{18}$ grains of sand on the earth that is $1.25\times10^{-5}$ moles of ...
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1answer
39 views

what is the graphic difference between ionic and covalent bonds?

Reading my chemistry 101 again I can not find a graphical difference between an ionic bond (gaining-losing and electron) and a covalent bond (sharing) an electron when I try to think of the orbits/...

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