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6 views

Concentration of sulfuric acid that makes a solution of pH=3.4

What concentration of sulfuric acid will make a solution of pH=3.4
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0answers
8 views

What are the fragments that result from taking the Mass Spectrum of o-fluronitrobenzene?

I am doing my online lab, and we are on mass spec right now. I am having a very tough time figuring out the shape of the fragments of o-fluronitrobenzene, especially the large peaks. Especially the ...
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0answers
5 views

what multiplicity to use for a system of a molecule and O2?

I know that O2 has a triplet state. If O2 is in the presence of another molecule, what multiplicity does the system have? I'm asking for the purposes of doing a DFT calculation.
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0answers
26 views

Remove peroxide and glycerol from hand sanitizer

I bought 80%-ethanol based hand sanitizer spray and realized it contains hydrogen peroxide and glycerin, which was not clear from the seller ( newegg.ca ). I would like to remove that additives. I ...
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0answers
17 views

Is there an organic process that can breakdown CO2 into free oxygen and carbon compounds at temperatures and pressures found on planet Venus?

After watching this video about terra forming the planet Venus, I was surprised that the author contemplated bio-engineering bacteria and extremophiles to convert the huge amount of CO2 in the ...
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0answers
19 views

Finding the right order for the stability of carbocations

I should list these carbocations in decreasing order of stability. My suggestions would be: 1 > 2 > 3 > 4 > 5 Structure no. 1 has 9 resonance structures and the benzylic carbocation has ...
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0answers
27 views

Theoretical Nucleus with Imaginary Numbers [closed]

I am curious as to how atoms may work by extending into the theoretical. I know that with one positive proton, you get standard matter. With one negative proton (antiproton) you get antimatter. Both ...
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2answers
32 views

Alternative Electrolyte Solution for Lead-Acid Batteries

I was curious about the possibility of creating a lead storage battery with dissolved sulfate compounds (like MgSO4, Na2SO4, (NH4)2SO4) in water as the electrolyte instead of sulfuric acid. From the ...
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2answers
163 views

How to make acetic acid more volatile so that it can be removed by vigorous aeration of an acetic acid-water mixture?

I want to remove acetic acid from a mixture of acetic acid and water by aeration. The concentration of acetic acid is 200 ppm (mg/L). The pH of the water is more than 5. I want to reduce the acetic ...
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0answers
23 views

Does heating potato starch destroy its resistant starch?

Resistant starch, as found in potato starch, is supposed to have health benefits. There are differing opinions on whether or not heating potato starch destroys the resistant starch in it and thereby ...
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1answer
45 views

Preparing aqueous solution of ethanol [closed]

You need to prepare $\pu{250.0 mL}$ of an aqueous solution of ethanol in the concentration will be $\pu{0.500 mol L-1}$. You have $\pu{100 mL}$ of a commercial solution of ethanol in water $(35.0\% \,...
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0answers
16 views

Why value of K(equilibrium constant)becomes squared when we multiply the equation with 2 when its value solely depends on temperature?

We know that value of equilibrium constant for a particular reaction is independent of concentration of the reactants with which we start or the direction from which equilibrium is approached But when ...
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0answers
30 views

Deriving volume from van der Waals equation

To calculate the volume of a real gas, $V$ in term $n^2a/V^2$ can be approximated as: $\displaystyle\frac{nR}{Tp}$ as ideal gas. Then, $V$ can be calculated as: $$V = \frac{nR^3T^3}{pR^2T^2 + ap^2} + ...
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0answers
54 views

Comparing basicity of amines

I have to put the following amines into the right decreasing order of basicity: Ethyldiisopropylamine, 2-phenylethylamine, 4-methoxyaniline, aniline and 2-nitroaniline. My solution would look like ...
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0answers
30 views

Isotopic effect on migratory aptitude of alkanides

Consider this typical 1,2 methanide shift in a carbocation: Which isotopic form of methanide ($\ce{CH3, CD3, or CT3}$) would migrate from secondary carbocation to form more stable tertiary ...
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0answers
26 views

I have to complete a chemistry research project for school at home because of COVID19. What kinds of experiments can I do at home? [closed]

It is fine if I would need to order materials and apparatus on the internet- I'm just very confused.
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0answers
28 views

Missed out on High school science, how to get up to speed [closed]

(Australian here) I didn't pay attention in science from year 7 to 10, and completely jettisoned all science related subjects in year 11 and 12 (specifically Biology, Chemistry, Physics). 10 years ...
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0answers
23 views

Relationship between pairs of compounds [closed]

I was wondering if someone could please explain why both of the given diagram are not the same structure. I will attach a screenshot with arrows pointing to both. Thank you in advance.
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1answer
45 views

Would Oxygen Gas and Ozone be a pure substance together? [closed]

If I have oxygen gas and ozone ($\ce{O2 + O3}$) together would it be considered a pure substance or a mixture? And would pure substances always have the same molecular structure?
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2answers
57 views

Why does activation energy depend on temperature?

To me it makes sense that the activation energy $E_\mathrm a$, as given by the Arrhenius equation, doesn't depend on the temperature as the needed energy (potential energy) to start a reaction has ...
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0answers
6 views

Easy DIY powdered biodegradable soap? [closed]

This may not be directly science related, but I believe those in this forum might have some pretty good answers. So here I go... I love Dr. Bronners unscented liquid soap! I can use it as dish washing ...
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0answers
12 views

Suggestions of GHS-compliant labelling software

Having amassed a rather large collection of reagents and products from previous years of chemistry experiments, I find rather annoying that their labels aren't even close to being standardized to the ...
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0answers
17 views

Inorganic Chemistry Problem [closed]

Imagine a descent in symmetry from Oh to D2h. For this descent in symmetry, preserve the C2 operations that are equivalent to C42 in Oh. Determine how each Oh operation appears in the D2h character ...
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0answers
20 views

Identifying a given structural formula [duplicate]

I came across this formula and have no idea what it is for: Would someone be able to enlighten me?
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0answers
25 views

Tools like Litmus Paper

Litmus papers are used to test acidity and alkalinity of a fluid. Are there other paper-based tools to test for other stuff like dissolved oxygen, presence of toxicity, electric potential etc?
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32 views

Activity of 1 M NaCl [closed]

I am quoting a sentence from this website. It said: "Thus, if γ (the activity coefficient) > 1 then ΔHkM is a positive quantity, indicating that the mixing process is endothermic." Why ...
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0answers
32 views

Can electrons occupy anti bonding orbitals? [closed]

I was drawing the MO diagram for O2 and put electrons in the anti bonding orbitals. So can electrons occupy anti bonding orbitals? Or did I mess up?
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0answers
11 views

How many possible resonating structure of the compound? [closed]

[! If there are 2 resonating structure then why not 41]1
-2
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0answers
23 views

Do anti binding orbitals exist or are they imaginary? [closed]

Do the anti bonding orbitals exist or are they like a hypothetical thing? Do they exist at the same time of bonding orbitals and they are just not occupied by electrons?
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0answers
43 views

Why ammonium dichromate has explosion? [closed]

Why ammonium dichromate has volcanic explosion when heated?
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0answers
41 views

Major product of Crossed-Cannizzaro Reaction between benzaldehyde and formaldehyde [duplicate]

I came across a question: Predict the major product when conc. $\ce{NaOH}$ is added to a mixture of $\ce{PhCHO}$ and $\ce{HCHO}$. According to me, as $\ce{HCHO}$ is less hindered and $\ce{>C=O}$ ...
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0answers
29 views

Are Cross Products Possible in the Claisen Rearrangement? [closed]

I have seen a question of FRIES Rearrangement in which Cross products are possible, Is it possible for Claisen Rearrangement too?
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1answer
37 views

electron - nuclei recombination within stars

Nuclear fusion within stars combine atom nuclei, so the atoms are ionized and electrons run for free. My question is, when or how these electrons recombine with the nuclei to form neutral atoms? ...
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1answer
59 views

In what solvents does ionic association occur?

When a ionic compound like $\ce{NaCl}$ dissolves, it doesn't always full dissociate due to ionic pairing. This is measured by the van 't Hoff factor. Now, this is what I'm looking at for my chem ...
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0answers
27 views

Why do electrons move from farther orbital (3d) to closer orbital (4s) upon excitation? [closed]

I have learnt that as the electrons move towards higher shells it attains more energy. However, according to Aufbau's principle, the order of filling up of orbitals is as follows: $$1\mathrm s < 2\...
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0answers
22 views

Where are the tetrahedral voids and octahedral voids located in an FCC? [duplicate]

A crystal is made up of atoms X, Y, and Z. Atoms X are in FCC packing, Y occupy all octahedral voids and Z occupies all the tetrahedral voids. If all the atoms along two body diagonal are removed, ...
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0answers
30 views

Can we define the equilibrium constant at any set of arbitrary conditions? [closed]

Can we have any random combination of temp and pressure having constant volume of gas reaction to achieve equilibrium? What I mean is if given conditions of $\pu{1 atm}$ pressure and $\pu{298 K}$ ...
-1
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1answer
33 views

How would one determine the temperature needed such that hydrogen peroxide will start to decompose? [closed]

Hydrogen peroxide decomposes at room temperature and so I was wondering what temperature is sufficient for this decomposition to occur. Can someone explain how we can determine this? (theoretically or ...
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2answers
27 views

When does replacing a double bond with a lone pair result in a valid resonance structure?

Take molecules A and B below. In A, we can move the electrons from the green pi bond into a lone pair on oxygen, then move the blue lone pair of electrons from the other oxygen to form a new π bond, ...
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0answers
21 views

Why c/a ratio for Ti, Mg and Zn deviates from 1.6333? [closed]

What is the reasons for the deviation if any from the ideal c/a ratio(1.633)of these Hcp packing.??
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0answers
14 views

How to reduce the surface tension of molten metals?

I'd like to reduce the surface tension of molten metals to reduce air bubbles by casting them like in this video with plaster. Actually the goal is to be able to cast gold without bubbles, but I guess ...
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0answers
12 views

How to calculus the critical time of Dissolved oxygen sag curve [closed]

Denote $DO_t$ to be the dissolved oxygen amount of the river in time "t". Denote $DO_0$ to be the dissolved oxygen amount of the river in the beginning. then the dissolved oxygen rate is $D=...
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0answers
13 views

Change in surface tension of soapy water as oil is added

I am wondering about how the surface tension of clean soapy water changes as oil is added to it? Is the change gradual or is it abrupt as the amount of oil added exceeds the amount of soap available ...
2
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0answers
27 views

Thermodynamics- How are various property tables made? [closed]

I've always been curious about how different thermodynamic property tables are made. It's really interesting to me. I want to know how different things such as critical properties and variations of ...
-1
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0answers
20 views

Why do you count both bonding electrons towards an atom's octet, but you only count one of them towards the atom's formal charge? [duplicate]

For example, oxygen is neutral when it has just 6 electrons. But the pink O in the molecule pictured has 3 bonds giving it 8 electrons, a full-octet. It's more electronegative than all the atoms it's ...
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0answers
16 views

Why does the lacto-fermentation of honey take much longer than other lacto-fermented fruits [closed]

I work in a restaurant in which fermentation is a key part of our menu, with lacto-fermentation being a common technique we perform. Recently we've experimented with lacto-fermenting honey. As lacto-...
-1
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0answers
16 views

What happens when a molecule is subject to its resonance frequency? [closed]

FCC notes that the resonance frequency of water vapor is around is around 24 GHz . Now, consider a radio transmission of this frequency is projected on water vapor. Question: When water vapor is in ...
1
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1answer
67 views

Are all gases equal in their ability to carry with them lower volatility matter at a given temperature? [closed]

As we all know water is a great solvent in it's liquid form relative to other substances. I wonder however how it performs as a gas relative to other stuff. Does anyone know how well steam carries ...
-2
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0answers
21 views

Determine Space group in graphine crystal [closed]

Given below is an arrangement of three layers of graphene which is repeating along the vertical direction. Determine the space group of this crystal. I want to write all the space group in graphine ...
-2
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0answers
10 views

Estimating pH with strong acids (H2SO4) [closed]

estimate the pH of a solution that contains 0.1 M each of Na2SO4 and H2SO4 So I know H2SO4 completely disassociates so I have 0.1 mol H+ and 0.1 mol HSO4. Na2SO4 disassociates into Na and SO4 such ...

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