Questions tagged [inorganic-chemistry]

Inorganic compounds generally do not have C-H bonds, while organic compounds do have such bonds. The distinction between inorganic and organic chemistry, however, is far from absolute.

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How do I make a buffer that resembles human blood? [closed]

What materials do I need to combine in order to make a buffer that resembles human blood? Do I only need $\ce{CO2}$ and $\ce{HCO3-}$?
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How do you count a Tp ligand's electrons using the covalent method?

I'm confused because say, you have (Tp)Ni(CH3)2 you'll have a 17 electron species in an oxidation state of +3. I thought the electron counting would be like this: Ni(0) = +10 electrons charge = +0 ...
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Why doesn't hydrochloric acid oxidize tin to tin(IV) chloride?

Diluted hydrochloric acid oxidizes tin to $\ce{Sn^2+}$ ion: $$\ce{Sn + HCl(aq) -> SnCl2(aq) + H2(g)}$$ Why is oxidation not complete? $\ce{Sn^4+}$ has closed shell and is more stable.
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Wavelength of Spectral Line Calculations gone terribly wrong

This is a question from Inorganic Chemistry by Duke University published by LibreTexts. The Pfund series of lines in the emission spectrum of hydrogen corresponds to transitions from higher excited ...
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Breaking Bad's 99.1% Methamphetamine Purity [closed]

Is there any chance that we can produce 100% Purity of Methamphetamine?
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Store Palladium Chloride in Solution

I have one gram of palladium chloride ($\ce{PdCl2}$) and I want to use very small quantities of it, in milligrams somewhere. It is not possible for me to get my hands on a scale that can measure that ...
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Does boron have s–p mixing in borane?

I am looking at $\ce{BH3}$ MO diagram. According to the internet, boron has $\mathrm{s\text{–}p}$ mixing between its $2\mathrm p_z$ and $2\mathrm s$ orbital. However, MO theory also states that ...
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During hybridisation, when do lone pairs occupy axial or equatorial positions?

In the sp3d geometry, the angle at the equatorial positions are 120 hence the lone pairs occupy the equatorial positions. But in the sp3d2 hybridisation, it is said that you can place the lone pair ...
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What Exactly Is Pairing Energy In Orbitals? [duplicate]

I have gone through many answers on stack exchange and on google too but couldn't understand them properly. just what I understood is that in an orbital according to the Pauli exclusion principle no ...
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Production of hydroxide ions in reactions in basic medium

Question similar to this one but with a more precise point. Taking, for example, a reaction in a basic medium (from NCERT textbook page 20) $$\ce{2MnO4- + H2O + I- -> 2MnO2 +2OH- +IO3-}$$ If the ...
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How to calculate the amount of free and total formaldehyde in a product [closed]

Above is the Certificate of Analysis (COA) of DMDM hydantoin. Free formaldehyde is at 1.0% max Total formaldehyde is ~18% Active matter is 55% minimum Water content w/w is 43-46% Please help me ...
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Suitable solvents to dissolve Aluminum Chloride (anhydrous) without generating Hydrochloric Acid (aqueous or gas)

Hypothetically, I have a chemical tank that was brought out of service and the solid deposits at the bottom of the tank primarily contain aluminum chloride. The whole system never sees water, and the ...
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Why does CaSO4 break up when adding HCl but not BaSO4?

I observed in a solution with CaSO4 that the white precipitate dissolved when I added concentrated hydro chloric acid (37%). I assume CaSO4 had a divorce and Ca decided to hook up with two Cl- ions, ...
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Confusion regarding classification of hydrides

According to my book,hydrides are classified as Ionic/Saltlike/Saline Hydrides, Covalent/Molecular Hydrides and Metallic/Non-stochiometric/Interstitial Hydrides. The explanation of my book is not very ...
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Which Group 16 elements form stable dihalides?

My textbook says that "except oxygen, all elements of group 16 form dichlorides and dibromides", while other sources quote that only Oxygen and Sulphur form dihalides and dibromides. Whereas,...
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Reaction of hydrogen peroxide with acetic acid and potassium permanganate

I conducted an experiment where I mixed hydrogen peroxide $\ce{H2O2}$, acetic acid $\ce{CH3COOH}$ and potassium permanganate $\ce{KMnO4}$ under vigorous stirring. The reaction hasn't stopped after 15 ...
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1 answer
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Is lead iodide a strong electrolyte?

So, lead iodide is insoluble. I see conflicting answers online. Some say it's a weak electrolyte because it is insoluble, others say it is a strong electrolyte because it is an ionic compound and any ...
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Looking For Resources on Separating Iron, Silicon Dioxide, and Sodium Chloride [closed]

I am working on an experiment and lab report for my high school chemistry course where I am given a vial with a mixture of Ferrum, silicon dioxide, and sodium chloride. I need to figure out how to ...
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Why is hexacyanoferrate(II) coloured whereas tetrachlorocadmiate(II) is not, even though both lack unpaired electrons?

$\ce{K4[Fe(CN)6]}$ is coloured whereas $\ce{Na2[CdCl4]}$ is not. Even Laporte selection rule would suggest the tetrahedral cadmium complex to have a higher intensity of colour than the octahedral iron ...
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Doubt on the process to determine the amount of precipitate of a salt, product of a reaction between two solutions

I am attempting to determine whether there is going to be the formation of a $\ce{AgCl}$ salt precipitate if the following two solutions were to be added together: $50mL$ of $\ce{NaCl}$, $0.04M$, $...
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Why are vapours of xenon hexafluoride coloured?

According to Wikipedia, [...] It is a colorless solid that readily sublimes into intensely yellow vapors. It is clear from the above statement that $\ce{XeF6}$ is colourless in solid form. But why ...
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What Are Angular Nodes , Radial Nodes, Nodal Plane and Nodal Surfaces? [duplicate]

Actually, i am confused between all of them. some says that angular node is same as nodal planes and radial nodes is same as nodal surfaces... and what's the difference between nodal planes and nodal ...
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How does heating alkali metals with graphite change its conductivity and density?

My textbook says when heating potassium, rubidium, cesium with graphite, the metals react by invading the space between the layers. They form highly colored interstitial carbides that are non ...
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What kind of solution is formed when alkali metals are dissolved at high concentration in liquid ammonia?

When an alkali metal is dissolved in liquid ammonia, it results in the formation of a deep blue coloured solution. $$\ce{M + (x + y) NH3 -> M+(NH3)_x + e^-(NH3)_y}$$ The ammoniated electrons absorb ...
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Formation of Sigma and pi bond

I have been told that is one px and py cannot combine to form Sigma bond because the bond axis of combination should be same and thus no case arise where Sigma bond may form between px and py orbital ...
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How does xenon react with O₂F₂?

This reaction was asked in my college entrance exam. I searched through the entire Internet, but I couldn't find any papers/sources. I suspect since O₂F₂ is a strong fluorinating agent, one of the ...
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Why do lone pair in sp hybridized orbitals have greater dipole moment than ones in sp3 hybridised orbitals

I was going through my chemistry text when I came across the fact that LP in sp hybridised orbitals have greater dipole moment then those in sp3 hybridised orbitals . However doesn't the definition of ...
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Why does the rate of change of atomic radius in the second period change so drastically?

I was reading in my textbook Chemistry Part I, Textbook for Class XI by NCERT, ed. January 2021 that: The atomic size generally decreases a period across as illustrated in Fig. 3.4 (a) for the ...
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What layer is formed on Titanium when soaked in Hydrogen Peroxide?

A few pieces of TI-6AL -4V ELI ASTM F136 Titanium jewelry were left to soak in a small cup of 3% household Hydrogen Peroxide. After about a week of soaking, all of the Titanium had acquired a smooth, ...
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What is the overall oxidation number of polyatomic ions?

In a polyatomic ion, the sum of the oxidation numbers of all atoms is equal to the overall charge on the ion. However, does this polyatomic ion have an overall oxidation number? We also know that the ...
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Is there any transparent see material that can endure temperatures of 2000 °C?

I was wondering if there is a transparent material that can endure temperatures up to 2000 °C without deforming or degrading. This material doesn't have to be glass, it can be plastic or a weirdly ...
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Common-ion effect vs complexation

Quoting from Wikipedia, The common-ion effect refers to the decrease in solubility of an ionic precipitate by the addition to the solution of a soluble compound with an ion in common with the ...
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Why and how do aqueous silica systems precipitate and can its occurrence be mitigated by quantifying its speciation correctly?

Background/Context: For context, I have been doing a lot of work on experimental systems in geopolymer chemistry lately with a focus on "activator" solutions which are essentially mixtures ...
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Why is H2N2O2, and not HNO, called hyponitrous acid?

According to IUPAC Red book page 140, hyponitrous acid, correctly said as hypodintrous acid, is $\ce{H2N2O2}$ while the compound $\ce{HNO}$, azanone also exists. So why is the dimer considered the ...
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What material(s) can offer similar performance to polyurethane in a paint coating, but with less hydrogen?

We need to coat parts of an neutron instrument with a boron shielding coating. This currently is achieved using an airbrush gun with a paint mix of demineralized water, polyurethane and boron powder. ...
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Why is diamond not the most dense substance?

Diamond is the hardest substance on earth which can be attributed to its tightly-bonded crystal lattice. Hence, assuming there were a substance more dense than diamond (which there are), mustn't it be ...
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Dissolving Pyrite with HCl: Will dissolving KNO3 in HCl give it a similar oxidizing effect to HNO3?

I'm trying to dissolve small pyrite (FeS2) grains. It's supposed to be done in nitric acid, but my lab doesn't have any. It does have a lot of 37% HCl and various salt oxidizers, such as KNO3, KMnO4, ...
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Why is the pH of this ammonia solution more acidic than another ammonia solution?

I made two similar ammonia solutions in different ways, and they resulted in different pH, but i'm not sure why. Solution 1 Added 5.84 g NaCl to a 500 mL flask. Then added 10 mL 25% ammonia solution. ...
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Iodine clock reaction: lower temperature but faster result?

I was told by several high school students that they experienced odd results in their iodine clock reaction lab. They did several different trials, and the lower the temperature, the faster the blue ...
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Why do alkali metals form coordination compounds like transition metals? [duplicate]

I've recently read that there are a type of cyclic ethers called "crown ethers" than can coordiate certain cations like potassium and sodium. How is this possible if they have no d-orbitals (...
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Why ionization energy of Thallium is higher than that of Indium?

I just normally calculated the effective nuclear charge (Zeff) for thallium and Indium from Slater's law, and I found it same for both! That is 5.(If you want calculation for answering or correcting ...
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Electronic configuration in d-block

According to Bohr-Bury rule, 4f and 5d orbital come after 6s orbital. But if I search for the electronic configuration for Os or any atom in d block for that matter, they give the electronic ...
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Is hydrochloric acid or sulfuric acid more corrosive to titanium?

Which acid is more corrosive to titanium at 20 to 30 °C and similar concentrations: hydrochloric acid $\ce{HCl}$ or sulfuric acid $\ce{H2SO4}$? I found some info on AZoMaterials — Titanium - Corrosion ...
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Does nitrous oxide decolorize potassium permanganate?

My teacher says that nitrous oxide can't form any complex with manganese in aqueous solution, so it can't be oxidised. However, shouldn't it get oxidised as it is present in the intermediate oxidation ...
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How do I derive metallic aluminum without electricity?

I'm laying the foundation for a project called 21st Century steampunk, where I figure out what the world would look like if electricity was never discovered. I'm wondering if it's possible to derive ...
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Why is is that tellurium(VI) fluoride is completely hydrolysed but iodine(III) fluoride isn't, even in hot water?

Tellurium(VI) fluoride is completely hydrolysed into tellurium(VI) oxide and hydrofluoric acid, but iodine(III) fluoride isn't, stopping at the iodine(III) fluoride dihydroxide/hydrofluoric acid level,...
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Two solutions for balancing a chemical equation? [closed]

6H2O2 + 2N2H4 → 2N2 + 10H2O + O2 4H2O2 + N2H4 → N2 +6H2O + O2 Which equation from above is correctly balanced? They all seem to be balanced but which one is correct?
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Does chromium(III) oxide react with or dissolve in liquid sulfur dioxide?

Liquid $\ce{SO2}$ (b.p. −10 °C) is known as a versatile solvent (yet not particularly pleasant to work with) for a wide range of organic and inorganic compounds having limited solubility in ...
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Why should I use thioacetamide instead of H2S when trying to separate cations from the H2S-group of cations?

I thought I shouldn't use $\ce{H2S}$ because of the smell/toxicity but was told there is a different reason. Does anyone know?
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How does bis(glycinato) Nickle exhibit optical isomerism?

I'm a medical practitioner but sometimes I find time to discuss few topics of chemistry with my son who has just passed out his 12th standard exams. Regarding optical isomerism I have learned that a ...

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