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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What does thermal stability of compounds depend on? [duplicate]

Does it somehow depend upon the lattice energy of the compound? My textbook says that Lithium carbonate is not so stable to heat and forms more stable $\ce{Li2O}$ and $\ce{CO2}$. Could it depend on ...
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Question on d block contraction

For size trend down a group, it is known that:$$Al\gt Ga$$ Due, to d block contraction of gallium. Why isn't this the case when it comes to silicon and germanium? Won't the poor shielding effect from ...
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Why do closo-boranes have a 2− charge?

In a question I was solving, it was mentioned that: [...] closo-boranes are compounds having the general formula $\ce{B_nH_n^2-}$ [...] an example is $\ce{B6H6^2-}$. Why do these boranes possess a ...
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Tendency of formation of complexes in Group-1 elements

My book states the following: Down the group(Group-1), tendency to form complexes decreases due to decrease in charge density$\bigg(\frac{\text{charge}}{\text{radius}}\bigg).$ This results in ...
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Order of Basicity of Nitrogen Trihalides

I was asked to arrange nitrogen tri-halides in order of increasing basicity. On looking up the answer online, it turned out to be the following: $\ce{NF3}$ < $\ce{NCl3}$ < $\ce{NBr3}$ < $\ce{...
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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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Covalency in bonding across the periodic table

Bonding between main group elements is obviously almost entirely covalent and it is often easy to see these covalent bonds as 2c-2e bonds localised between two atoms. The bonding in borane, boron ...
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Order of Lewis acid character among sulfur hexafluoride, sulfur tetrafluoride and tetrachloromethane

Problem Compare the order of Lewis acid character of $\ce{SF6},$ $\ce{SF4}$ and $\ce{CCl4}.$ My attempt Oxidation state of $\ce{S}$ in $\ce{SF6}$ is $+6,$ so it is very electrophilic. $\ce{S}$ has a ...
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How to determine what covalent compound a substance is?

I have been given a substance which is unknown in my class. The substance is white in colour and is in a powder form. I have conducted a few tests and have found out that the substance is a covalent ...
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Cleaning with vinegar and sodium bicarbonate

Mixing sodium bicarbonate with vinegar (and sometimes adding dishwasher detergent) is quite a common tip on the internet. But I have never understood the reason. I saw there was a question about using ...
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Does spectrochemical series trend depend on the metal center?

Can the trend of spectrochemical series vary/fluctuate according to the central metal atom (CMA) that is being used? For example, for the CMA $\ce{Ni^2+}$ the ligand $\ce{H2O}$ will have more CFSE ...
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Concentration of sulfur in turbid solution

I recently participated in an experiment where I need to calculated the reaction orders and the reaction constant of the reaction: $$\ce{8 Na2S2O3(aq) + 16 HCl(aq) -> S8(s) + 8 SO2(g) + 16 NaCl(aq) ...
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Why are there only a few types of sigma overlaps?

While studying σ-bonds, I saw that only s–s, s–p and p–p orbital overlaps are being taught. But are there more such cases possible? Because apart from s and p, there are also d and f orbitals.
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Boron-Boron bonds

I am reading up on boron in my notes and there is a certain paragraph that I do not understand The tendency of $\ce{B}$ to form $\ce{B-B}$ bonds is less pronounced than that of carbon, its ...
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Synthesis of anhydrous sodium tungstate

I am interested in preparing an anhydrous sample of sodium tungstate (Na2WO4), which is normally found as the dihydrate. Finding an example of this in literature is proving difficult, I am interested ...
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Energy levels of combined orbitals

I saw the MO diagram for a NH3 molecule but couldn't understand why the combined atomic orbitals were in the positions they were, and if these positions were fixed. Why is the sigma anti bonding ...
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Thermal decomposition of magnesium bicarbonate

I was trying to solve a problem from a regional contest where it was a mixture of bicarbonates of $\ce{Na}$ and $\ce{Mg}$ which was put at high temperature. What are the reactions of decomposition? I'...
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Silicon–Boron Covalent Bond

This is a semiconductor-related question, but in order to understand the acceptor level energy state of boron in bilicon, I figured I'd ask here for hints. Boron is a p-type material when introduced ...
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Role of calcium oxide in soda lime decarboxylation

Why do we use calcium oxide $\ce{CaO}$ in soda lime decarboxylation? $$\ce{\underset{sodium acetate}{CH3COONa} + \underset{sodium hydroxide}{NaOH} ->[\Delta][CaO] \underset{methane}{CH4} + \...
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Wittig reagent with metal–oxo bonds

Could you use the Wittig reagent to attack a metal–oxo bond and replace the oxygen with a carbene? Specifically, is it possible for the Wittig reagent to do σ-bond metathesis with an electrophilic ...
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Chemical equilibrium of inorganic complexes

After mixing Cobalt(II) Chloride hexahydrate with ammonium chloride a violet complex forms, what would be the complex formed? It was the precursor for producing hexamine cobalt chloride so I didn't ...
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Chemical methods to extract Oxygen from Rust

Let's say I have a large quantity of rust and want to extract the oxygen from it in a way that allows me to collect the oxygen in a container. What chemical process can I use to do this and what ...
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How does lead toxicity from jewelry happen vs. occupational exposure?

It is known that lead levels in jewelry is a problem, especially for children (https://dtsc.ca.gov/toxics-in-products/lead-in-jewelry/). As a parent with jewelry-loving children I am aware that ...
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How solubility in alcohol imply covalent nature

lithium chloride is considered to be an ionic compound,but it is soluble in alcohol,which suggests that it also posses a small amount of covalent character. This is an extract from my book ,when I ...
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How is the UV-visible spectra of carbonatotetraamminecobalt(III) nitrate interpreted?

In a laboratory practice I have done a characterization of the $\ce{[Co(NH3)4CO3]NO3}$ and obtained the following spectra: I don't know if the band between 300 nm and 400 nm can be due to the effect ...
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Why is distillation not a viable way to separate ammonia from water?

Since the steam pressure of ammonia is higher than that of water, I would expect distillation to be a reasonable way of separating a mixture of both. However, in industrial applications known to me ...
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Judging orders in a series of compounds

My teacher frequently gives us questions where we have to arrange the given binary compounds on basis of their melting points or solubilities. He did give us some instructions in order to judge this ...
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Combustion of NaCl(aq) when testing conductivity

In a experiment that dealt with electric conduction of many concentrated solutions, NaCl(s) created an unknown, to me, substance after adding a drop or two of water. Furthermore, it isn't the reaction ...
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Where can I find the released combustion energy in NASA CEA rocket problem?

I am using NASA CEA program for a study project. I have read the CEA Nasa user's manual over and over, yet I haven't found an answer to my question which is : where can I found in the output of NASA ...
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What is the precision of intensity data in XRD measurement?

I made some relative crystallinity measurements on a zeolite (crystalline aluminosilicate). Which is measured for a specific peak area and compared with a reference sample. The XRD of powder patterns ...
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Why doesn't octahedral d8 system exhibit Jahn-Teller effect?

Chemistry LibreTexts stated clearly that (under the section 'Large $\Delta$' and 'Small $\Delta$') octahedral d$^8$ system does not exhibit Jahn-Teller distortions. But then it stated also: ...Some ...
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Why does bonding in T.M complexes get stronger down the group but bonding in p-block elements gets weaker?

In the p-block, it’s a well-known general trend that down the group, the homonuclear diatomic bond dissociation energies decrease (generally). E.g in group 14: C-C —> 607 kJ/mol Si-Si —> 327 kJ/...
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Air bubbles in water [closed]

Problem : Gas. Density. (Composition) N2- 0.879 (0.78) O2-. 1.32 (0.21) Why air bubbles don't disintegrate in water into different components due to difference in apparent weight (= ...
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Acidic KMnO4 oxidizes H2S to S. Why doesn't the oxidation proceed further to sulfur oxide, sulfur dioxide or sulfur trioxide?

I have some idea about the question. I think it has to do with oxidation/reduction potentials but I am not able to find any resource for the exact values or how to make sense of them in this context. ...
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Can nitrous dioxide develop when copper and dilute nitric acid react?

When doing an experiment in the laboratory with copper, dilute nitric acid and finally hydrochloric acid, the first reaction between copper and dilute nitric acid should end in nitric monoxide, cupric ...
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What are the applications of tetraxenonogold(II)?

I recently stumbled upon a pretty interesting chemical: tetraxenonogold(II) $\ce{AuXe4^2+}.$ Basically, an atom of gold with four xenons around. It is a product of a superacid reaction and it is ...
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What explains the trend of ionization potential in coinage metals? [duplicate]

The expected pattern for ionization potential is $$\ce{Cu} > \ce{Ag} > \ce{Au},$$ but the observed patter or experimental value is $$\ce{Au} > \ce{Cu} > \ce{Ag}.$$ What could be a ...
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Why do we not using concentrated HCl and zinc reaction to prepare hydrogen?

First apologize for this kind silly question.One of my student ask me this question but I was unable to get a perfect answer from internet.Generally dilute HCl and impure zinc are using for hydrogen ...
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Why is the cathode of a lithium-ion battery metallic, which is the opposite of most other batteries? [closed]

In most types of batteries, primary and secondary, the metallic electrode is the anode, and a non-metal acts as cathode. Or a pure metal is the anode, and the cathode is a metal oxide. Why is the ...
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Why are the melting points of Sb and Bi lower than that of As?

My book says it has something to do with the inert pair effect. And unlike As, Sb and Bi tend to form 3 covalent bonds rather than 5. I don't understand what's really going on here.
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Why is the melting point of magnesium oxide higher than aluminium oxide?

There's a graph of the melting points of period three oxides. The melting point of magnesium oxide is several hundred Kelvin higher than aluminiumoxide. I can't find any explanations for this on the ...
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What is the formula of bleaching powder?

What is the structure and preparation for bleaching powder? Why there is a controversy in the formula of bleaching powder? I have encountered many forms of the formula of bleaching powder, like $\...
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Synthesis of Pt(II) complex using trans effect

By making use of the trans-effect in platinum(II) complexes, show efficient routes for the synthesis of all the possible isomers of $\ce{[PtCl(NH3)2(py)]+}$ (where $\ce{py}$ = pyridine) from the ...
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Does this general hybridization rule really apply?

So this rule is known about hybridization that: if 4 groups (atoms/pairs of electrons) are attached to the atom -> sp3 if 3 -> sp2 if 2 -> sp but isn't that true only to specific elements ...
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Origin of the 15% difference limit between solute and solvent atom radii in the Hume-Rothery rules

According to the Hume-Rothery rules for the substitutional solid solutions the atomic sizes of the the solute and solvent must not differ by more than 15%. Why should it be so?
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How many tetrahedral and octahedral holes are there in a bcc unit cell?

When I tried to count, I found 24 tetrahedral holes (each formed by 2 body centers of 2 unit cells sharing a face and 2 vertices of the same edge of that face). As each hole is being shared by 2 unit ...
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What is the correct electronic configuration of darmstadtium?

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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Radius of hydride (H⁻) ion

What is the radius of the hydride $(\ce{H-})$ ion? There are several sources with conflicting reports on the same. Inorganic Chemistry: Principles of structure and Reactivity cites Pauling’s 1960 ...
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Trends in solubility of group 2 nitrates

In my lab report, we are required to explain the trends in solubility of group 2 salts, going down the group. I had explained all of the trends except one, group 2 nitrates. The following is the data ...
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how to separate a mixture of sodium chloride and sodium hydroxide

I recently did an double displacement reaction in that I have formed a solution of water with sodium hydroxide and sodium chloride are dissolved in it. now I want to separate both of them

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