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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Conducting cyclic voltammetry in an air sensitive manner

Does anyone have suggestions on ways to conduct cyclic voltammetry on an air sensitive material without shipping the entire set up into a glovebox? This is for redox active organometallic compounds.
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Catalysts and activation energy

Do catalysts increase rate of reaction only by decreasing activation energy? Or can they affect the Arrhenius factor or reaction orders? Like if one catalyst is more effective at increasing rate of ...
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Crystal Field Theory

When I learned about crystal field theory I had fallen on a paradox. When K4[Fe(CN)6] is formed then three d orbitals are occupied by electrons of Fe2+ pairly and the rest two d orbitals are occupied ...
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Reaction of Silicon Dioxide with Hydrofluoric Acid [duplicate]

I learnt that $\ce{SiO2}$(Silicon dioxide) doesn't react with any acid except $\ce{HF}$. So what is special about $\ce{HF}$? Why does only $\ce{HF}$ reacts with $\ce{SiO2}$ even though $\ce{HF}$ has a ...
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What is the correct electronic configuration of darmstadtium (Ds; Z = 110)?

Some of the places, the electronic configuration of darmstadtium ($\ce{Ds}$) is given as $\mathrm{6d^9 7s^1}$ while at some other places, it is $\mathrm{6d^8 7s^2}$. WHICH AMONG THE TWO IS CORRECT?
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Can there still exist equilibrium with a very high equilibrium constant?

Problem Consider the reaction translated by: $$\ce{2 CO(g) + O2(g) <=> 2 CO2(g)} \quad K_c = 2 \times 10^{22}~\text{at } \pu{1000 K}$$ The order of magnitude of the equilibrium constant, $K_c$,...
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How to predict the reason for color in a transition metal complex? [duplicate]

I know about two reasons for the color of transition metal complexes that are dd transition and charge transfer phenomenon but I am confused when a complex can show both of the above-mentioned ...
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What does spontaneous mean in term of forward and reverse reactions?

I just learnt about Gibb's Free Energy and was thinking about an exothermic reaction with a negative change in entropy. This means that the reaction would occur at low temperatures. But that means ...
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Why does CCl4 not undergo hydrolysis while other chlorine-derivatives of methane do?

In one of my textbooks, I came across a question as to why does $\ce{CCl4}$ not undergo hydrolysis. The answer given went along the lines of carbon lacking a vacant d-orbital to accept the lone pair ...
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Why does the Electron Affinity of Selenium is more than that of Oxygen? [duplicate]

I got that the electron affinity of oxygen is due to its smaller size which leads to more repulsive effect relative to that of lower groups. But, I am bit confused in why the order $\ce{S > $\bf{Se}...
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How does pressure influence the dehydration of salts?

It's well known that the boiling point of a substance increases with pressure. I was wondering if something similar happens with hydrated salts and the temperature at which they dehydrate. I mean, if ...
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Aquo metal complex structure

Draw the structure of the complex $\ce{Co(NO_3)_2*6H_2O}$ i) without and ii) with one of the nitrates being in the coordination sphere as a bidentate ligand and identify if the inversion center is ...
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Why does the oxides that form change down the alkali metals? [duplicate]

Why does Li2O primarily form when Li has reacted with O2 but the Na2O2 forms for sodium? Moreover, the primary product for the other alkali metals are superoxides instead of oxides and peroxides. How ...
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Free refined value in Rietveld

I have a question about Rietveld refinement The author of this paper claimed that the free refined CN ligand is 1.081. However, they does not show how they got that number. They stated it was based ...
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Can ZrO2 be made fluoride resistant?

$\ce{ZrO2}$ has great properties, biocompatibility, chemical resistance, decent scratch resistance, great thermal resistance and refraction, but it could be better. It, like glass, will slowly react ...
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How the attraction takes place between a hydrogen atom and the acceptor atom in a hydrogen bond

In hydrogen bonds present in water,does the hydrogen atom attracts to the lone pair of electrons present on the oxygen atom or to its partial negative charge? If former is the case are there any ...
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Basicity order of 2nd group oxides

It's a general trend that basicity of oxides decreases down the group. But recently I came across a statement "the basicity of second group oxide decreases down the group and decrease in basic nature ...
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Why are sulphide salts of p and d block coloured?

I have studied that sulphide salts of s block are colourless while p and d block salts are coloured. But colour intensity of a salt is directly proportional to polarisation in salt. And s block ...
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The molecular diagram of the Boron hydrogen bond (B-H)

In class today, we had a discussion about the bond between boron and hydrogen and we drew it like this(The pictures on the right are the corresponding molecular orbitals): The argument was that 2s ...
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How can fluorite structure exist?

From the information from Google the radius of $\ce{Ca^2+}$ cation is $100 \,\pu{pm}$ and of $\ce{F-}$ anion is $132\, \pu{pm}$, so essentially $\ce{F-}$ ion should form the Bravais lattice (FCC/CCP) ...
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Enthalpy of reaction and Hard/Soft Acid/Base

The following reaction has an Enthalpy change of -1 kcal/mol: CsI + RbCl -> CsCl + RbI Is it possible to explain this in terms of Hard/Soft Acid/Base ?
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Basicity of oxide and thermal stability of oxosalt

I recently read in Concise Inorganic Chemistry by J.D.Lee, with regard to s-block elements: the oxides and hydroxides of group 2 metals are less basic than 1; consequently their oxosalts are ...
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Suggest a combination of magnetic exchange interactions, and explain how those exchange interactions work

The figure below shows the structure of La0.20Sr0.80MnO3 perovskite. At room temperature, it has a cubic unit cell with a lattice parameter a = 3.82 Å. O sites are white, mixed La/Sr sites are light ...
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Why is [Ni(en)3]2+ paramagnetic? [duplicate]

I could not find a satisfactory answer for the above question anywhere on the internet/on SE. Why does $\ce{en}$, which is a strong field ligand, not cause the electrons to pair up in $\ce{[Ni(en)3]^2+...
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Which orbital participates in bonding of d and f block elements as these are never the outermost orbital?

For example: Yttrium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d1 5s2 The outermost orbital is the s-orbital but d-orbital is unfilled. How does overlap of orbital take place in YCl3 as d-orbital is beneath ...
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Can other group IV elements form graphene analogs with interesting properties? [duplicate]

Graphene has gathered quite a bit of press due to its unique physical properties which hold enormous promise in a wide range of applications from semiconductors to high strength materials. Given that ...
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How many moles of crystallization water are present in one mole borax ?? 8 or 10? [duplicate]

How many moles of water of crystallization present in per mole of borax ?? Borax is $\ce{Na2BO7.10H2O}$. This suggests that number of moles of water of crystallization is 10 [And after removing these ...
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Understanding chemical reactions

I just got in 10th grade and the first chapter in Chemistry in our school curriculum is Chemical Reactions and Equations The chapter is littered with a lot of chemical reactions and their equations ...
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Is the magnitude of ionisation enthalpy and ionisation energy is same?

In my textbook it is written that ionisation energy and ionisation enthalpy are two different quantities. ionisation energy is the amount of energy provided to extract an electron from the outermost ...
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Electrolysis of concentrated sodium chloride solution using A.C. power supply

I heard that A.C current is never used for electrolysis as the polarity of the electrodes keep changing and this can result in explosive reactions. However, why can't we use this to our advantage? ...
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Why is sulfuric acid used to seal flask with highly reactive chemicals? [closed]

I the video https://youtu.be/saANxD0cqy0?t=200 (time 3:20) NileRed states that he uses sulfuric acid to seal off flask with a mixture of pottasium dichromate and table salt. He says that sulfuric acid ...
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Where do I get data on constants in the activity coefficient equations like Truesdell Jones,Debye huckel to find activity?

I am trying to find the activity coefficient of the pt ion, using its ionic strength. I am unable to find any data on constants like ai and bi in the Truesdell Jones equation etc. I need to plug the ...
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MO diagram for triiodide anion [duplicate]

I can't figure out this MO diagram. Are there d orbitals involved? I thought the central atom would have d orbitals participating in bonding since it has an expanded octet. For the central atom I ...
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How to add components in visual MINTEQ

I need to figure out speciation of a mixture of metal nitrates and chloroplatinic acid. I am using visual MINTEQ to do this. But platinum ion is not there in the visual MINTEQ component list. I need ...
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Are these two reactions the same? [duplicate]

I read the book an it said when $\ce{NH4Cl}$ dissolves in the water, the reaction of $\ce{NH4+}$ will be $$\ce{NH4+ <=> NH3 + H+},$$ but instead, the first reaction came to my mind was $$\ce{...
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Trying to synthesize and crystallize iron (iii) ammonium sulfate

I've been following instructions (from here, the first method) to synthesize iron (iii) ammonium sulfate and crystallize it. The first attempt was a fail, I spilled most of my solution and what I ...
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Chirality and number of sterioisomers

I have recently read that the number of sterioisomers in a compound having n chiral centres is 2^n. (That is, if no meso form is present) The below question asks for the number of sterioisomers in ...
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Change in pH when changing the sequence of acidic solution

I have 4 acidic solutions: Barium nitrate, aluminium nitrate monohydrate, cobalt nitrate hexahydrate, and hexachloroplatinic acid. Everything is dissolved in water. I mixed them in order to create a ...
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How does trimethylgermane feature in this reaction scheme?

I think this reaction forms some monomer of styrene and trimethylgermane but I can't seem to figure out what the intermediates are or the mechanism in which how this is formed. I know that the ...
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Lewis acidity order of nitrogen family halides

In chlorides of nitrogen family (group 15), why does the Lewis acidity decrease down the group? We know electronegativity decreases down the group. Therefore, the partial negative character of the ...
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Symmetries and degeneracies of the s,p, and d orbitals

Consider the molecular AB_8 (complex with central atom A and 8 B ligands (coordination number 8), for which I determined the point group D_4d) and determine the symmetries and degeneracies of the s, p,...
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Comparing bond angle [duplicate]

How can I compare bond angle between hydrogen sulfide, $\ce{H2S}$, and sulfur dioxide, $\ce{SO2}$? In $\ce{H2S}$ there are 2 lone pairs whereas in $\ce{SO2}$ there is 1 lone pair which means bond ...
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Formulation chemistry. Can somebody suggest me an introductory book on this subject? [duplicate]

I am looking for an introductory book on formulation chemistry: the book should cover physico-chemical aspects in designing a formulation and also, if possible, the chemometric basic concepts used in ...
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SO2 oxidation and Le Chatelier's Principle [duplicate]

From the following textbook by Brown, LeMay, Bursten, et. al., Chemistry the Central Science 14th Edition. I have the following question from Chapter 15 Chemical Equilibrium number 61. The basis of ...
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Why is H2Te the strongest acid among the following?

Among H2S, H2Se, H2Te the strongest acid is H2Te. The reason being that the bond strength in it the weakest so it dissociates easily. But my question is that why does it looses H+ in first place ...
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Oxidation states the elements in nitrosyl chloride

I have read that $\ce{NOCl}$ dissociates to $\ce{NO+}$ and $\ce{Cl-},$ and the various reasons stated as such seem fine. But what I don't get is this: if we follow the actual rules of assigning ...
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How to disperse and disolve acrylate copoylmer?

I've made many attempts to dissolve my acryalte copolymer into water, i've tried both hot and cold, stirred and used a grinder to dissolve it but it doesn't. Anyone who can help?
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Would Zirconium (IV) Silicate be stable in a hot oxygen atmosphere?

As per the title, really. I potentially need to protect a bit of pipework from hot oxygen (800-1000 K), and I've seen this refractory paint for sale. It says it's good up to 1750 C, but hot oxygen is ...
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33 views

Bonding in molten silicon dioxide

Solid silicon dioxide has a giant lattice structure with single covalent bonds, while in the gas phase it has a molecular carbon dioxide-like structure. But what about in the liquid phase? Would it ...
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52 views

Looking for color changing reaction to track snow layer depth

I'm trying to find a chemical to mark the position of a snow layer with for detection in future seasons. The substance has to be: 1. Colorless 2. Not water soluble/solid 3. Stable for multiple years ...

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