All Questions

What concentration of sulfuric acid will make a solution of pH=3.4

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 ...

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.

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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\% \,...

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 ...

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} + ...

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 ...

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 ...

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

(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 ...

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.

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?

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 ...

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 ...

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 ...

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 ...

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

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?

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 ...

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?

[! If there are 2 resonating structure then why not 41]1

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?

Why ammonium dichromate has volcanic explosion when heated?

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 $\ce{>C=O}$ ...

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

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? ...

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 ...

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\...

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, ...

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 $\pu{298 K}$ ...

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 ...

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, ...

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

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 ...

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=...

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 ...

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 ...

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 ...

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-...

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 ...

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 ...

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 ...

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 ...