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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Why is there no Pi-backbonding in BeCl2?

The $\ce{Cl}$ atoms in $\ce{BeCl2}$ donate a lone pair to the $\ce{Be}$ atom of another molecule so that Beryllium can complete its octet. What I don't understand is why don't the $\ce{Cl}$ atoms ...
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Why do reactions of sodium halides with sulfuric acid produce sodium hydrogen sulfate instead of sodium sulfate?

In the reaction of sodium halides with sulfuric acid, sodium hydrogen sulfate is produced \eqref{NaHSO4}. Why would this be produced instead of sodium sulfate \eqref{Na2SO4}? \begin{align} \ce{NaX + ...
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261 views

S-N bond IR vibrations

I am working on organosulfur compounds where i have S-N bonding, according to literature it might be having an ir vibration of 1100cm-1, could anyone confirm it with reference. (the complete bonding ...
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252 views

Lead(II) oxide CRT monitor extraction

I have a large CRT monitor that, by the weight of the monitor, I estimate to contain over two pounds of lead. I want to know if the lead oxide is a mixture with the glass, or if it is chemically ...
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715 views

Does mercury (I) chloride react with HCl?

If solid $\ce{Hg2Cl2}$ is placed in concentrated $\ce{HCl}$, will it react? If so are the products $\ce{Hg2^2+}$, $\ce{H2}$, and $\ce{Cl2}$ ? $$\ce{Hg2Cl2(s) + 2HCl(aq) -> Hg2^2+ + 2Cl2(g) + H2(...
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338 views

Infrared Spectroscopy of Hexachlorocyclotriphosphazene

When assigning the IR spectrum of hexachlorocyclotriphosphazene there are two prominent peaks (one due to the nitrogen-phosphorus bond and the other due to the phosphorus-chlorine bond). There is ...
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331 views

Why does phosphine reduce HgCl2 to Hg but LiAlH4 / LiH reduces it to Hg2Cl2?

Why does phosphine reduce $\ce{HgCl_2}$ to $\ce{Hg}$ but $\ce{LiAlH4}$ or $\ce{LiH}$ reduces it to $\ce{Hg2Cl2}$ ? It seems phosphine has more reducing tendency.But why? Moreover can it be ...
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103 views

Is there a chemical reaction between tungsten carbide and acrylic?

My company machines acrylic (Poly(methyl methacrylate) $\ce{(C5O2H8)_n}$), and notices that tungsten carbide tools break down quickly compared to high-speed steel, even though carbide is harder and ...
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160 views

What acid can remove Calcium in Ca2SiO4 to leave SiO2 (mostly)

What acid can remove calcium in $\ce{Ca2SiO4}$ to leave $\ce{SiO2}$ (mostly)? It seems that calcium silicate is stable in most acids, but I need to etch it and leave only silica (mostly).
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Why is ionisation energy of bismuth lower than lead?

Why is ionisation enthalpy of Bismuth less than that of Lead for it just comes after the latter in periodic table? First ionisation energy of bismuth is 703 kg/mol while that of lead is 715 kg/mol. I ...
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31 views

Reference request for properties of amorphous titanium carbide (a-TiC)

I assume through some side reaction I'm getting $\ce{TiC}$ in my $\ce{TiO2}$ samples after calcination and I need some basic information about the properties of amorphous $\ce{TiC}$. Is it ...
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754 views

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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45 views

How come ancient Egyptian ink didn't fade during thousands of years?

This ink's main ingredients were charcoal, honey and gum arabica. I understand charcoal is carbon and it would remain black for long time or forever just like coal. But gum arabica is organic and I ...
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1k views

O-N-O bond angles in oxides of nitrogen

If we look at the bond angles of O-N-O in figure (c), (D) and (F), there not too much change in bond angle. Even though they are notable. So my question is, Why do we observe very small change in ...
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163 views

Relative strength of metal hydrides as reducing agents

Question: Out of $CH_4, CaH_2, FeCl_2$ and $BeH_2$, which compound would produce the most strongly reducing aqueous solution? Thoughts: Out of the hydrides, I would say that $CaH_2$ stands a good ...
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40 views

Curious precipitate from substitution reaction

Two solutions were prepared. 'Solution A' being $\ce {Na2S4}$ prepared from aqueous $\ce {NaOH}$ and elemental sulfur, the mixture heated and additional sulfur added until sulfur remained as a ...
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64 views

Generating Precipitation Diagrams with CompuTherm Pandat

I am trying to develop precipitation diagrams for an Ag-Cu-Sn alloy to figure out the kinetics involved using the CompuTherm Pandat Software (Demo Version). The precipitation diagrams need the ...
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162 views

If both nitric acid and nitrate ion are stabilised through resonance, what makes the nitrate ion more stable in aqueous medium?

If both nitric acid and nitrate ion are stabilised through resonance, what makes the nitrate ion more stable in aqueous medium? Can the same argument be applied to nitrous acid and nitrite ion in ...
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444 views

What does boiling point of a metal depend on, specifically manganese?

Boiling point, as I understand, generally depends on molar mass and the intermolecular interactions in the liquid phase. What are the other influencing factors? What intermolecular forces are present ...
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504 views

How to find the standard enthalpy and entropy for the dissolution of silver chloride?

A maximum of $1.89~\mathrm{mg}$ of $\ce{AgCl}$ will dissolve in $1.00~\mathrm{L}$ of solution at $25.00~^\circ\mathrm{C}$. A maximum of $5.26~\mathrm{mg}$ of $\ce{AgCl}$ will dissolve in $1.00~\...
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54 views

Why does Pb(II) promote ligand substitution?

I have heard of an article where divalent lead $\ce{PbL2}$ ($\ce{L}$ is ligand) reacts with something (again not sure, as I dont know the article) and what it reacts with gains a ligand. In less ...
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145 views

Does the magnesium 2+ ion prefer an octet or more?

In organic chemistry I was told that the magnesium ion which is part of Grignards is coordinated to several ether molecules. The overall structure around the magnesium is tetrahedral, which implies ...
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933 views

In what ways (other than color) does black Aluminum Oxide differ from white?

I work in a (physics) lab in which an aluminum oxide coating is applied to the inner surface of a plasma confinement vessel (made of Cu) to provide an electrically insulating layer that can withstand ...
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42 views

Am I right in giving the following reason for some questions relating to the p-block?

I'm seeking clarification as I believe this to be the answer to why boron compounds are electron deficient. While bonding, the $2s^2$ electrons of Boron are excited to the $2p_y$ orbital, they engage ...
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361 views

Carbon monoxide detector reaction

I have recently bought a carbon monoxide spot detector which is not working the way I intended for it. A carbon monoxide spot detector is an analog carbon-monoxide detecting patch that changes color ...
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94 views

How is N to C ratio measured in forming austenitic stainless steel?

Nitrogen is the future hope of stainless steel industry; since in the production of austenitic steel it can even completely replace Nickel (which is relatively very expensive) in some cases and for ...
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81 views

Clean tin with aluminium

I've been using aluminium foil and table salt to clean my silverware for a long time without actually concerning myself with the chemistry behind it. A couple of days ago i started digging into the ...
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128 views

What distinguishes a Lewis Complex from an Adduct or are they synonymous?

I cannot think of a distinction - the terms seem to be used interchangeably when talking about products of Lewis acid-base reactions. However, I am concerned that I may have overlooked a subtlety. ...
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194 views

Hexafluorosilicid acid attacks glass?

When HF meets glass, Hexafluorosilic acid is formed (assuming some water is present). It appears that Hexafluorosilic acid and further attack glass? How is this so, considering that all F atoms are "...
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70 views

Is there a compound where one element has a CCP structure with all voids occupied by others?

My Google-fu hasn't got me anywhere. All results have been quite fuzzy about it, nothing explicit.
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376 views

Are there practical chemical reactions that do mechanical work without heat or electricity?

Every day we use chemical reactions to perform mechanical work by creating either heat (e.g. in a piston engine) or electricity (batteries). I know muscles perform work by taking stored chemical ...
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102 views

What are the possible side reactions when preparing iron(III) naphthenate?

I am trying to prepare some iron(III) naphthenate. And the raw materials are : ferric(III) chloride, and naphthenate acid, NaOH, toluene, deionized water Everything worked well in lab scale: final ...
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Making a reasonable slab of alpha quartz

I want to perform a molecular dynamics simulation with alpha-quartz as my mineral surface. I want to study adsorption of water on alpha-quartz. The most dominant error that I came up with is the ...
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154 views

What reaction took place?

Okay, so I was fiddling about in the chemistry lab, and I added: Sodium Nitroprusside (soln) $\ce{Na_2[Fe(CN)_5NO]}$ with Potassium Ferrocyanide (soln) $\ce{K_4[Fe(CN)_6]}$. $\ce{Na_2[Fe(CN)_5NO]}$ ...
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422 views

Analysis of a mixture of carbonate salts

We've got a mixture of carbonate salts. It's a buffer, used in fish tanks. How might we go about identifying the components and their concentrations? I suspect it'd be hard to separate some of this. ...
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278 views

Why does sp hybridised orbital have more directional character than p orbital?

It states so in my textbook. But since s orbital is non directional, shouldn't sp hybridized orbital be less directional in character than p orbital?
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1answer
197 views

Comparing the bond strength between a polar bond and non-polar bond

According to NCERT class 12 part 2, $\ce{ICl}$ has lesser bond enthalpy than $\ce{I2}$. I have read that non polar covalent bonds are weaker than polar covalent bonds as in polar covalent bonds ...
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2answers
68 views

Residual hydroxyl groups in silicone resins

Silicone resins are solutions of branched-chain siloxanes containing residual hydroxyl groups. What is meant by "residual hydroxyl groups"?
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Alkylation before ring closure?

So, another question from my side. I have been thinking about the folowing reaction: The reaction above exists and was already done on two occasions and reportedly works really well and it seems to ...
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Explanation for the reaction of gold and iodine(iii) solution

The Experiment A few days ago I saw a video of dissolving gold in the condition of $\ce{ICl3/HCl(aq)}$. In the video, $\ce{ICl3(s)}$ is added to a test tube, followed by adding conc. hydrochloric acid....
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Bond length comparison in substituted phosphorus pentahalide

What would be the comparison between $\ce{P-F}$ and $\ce{P-Cl}$ bond length in phosphorus tetrafluoride chloride $\ce{PF4Cl}$ and phosphorus trifluoride dichloride $\ce{PF3Cl2}$ in the equitorial ...
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How to increase the conversion of a reaction between an ammonium salt and ethylenediamine?

I've been trying this reaction in my lab and there is the formation of the substituted ethylene diamine but along with that, I am obtaining some amount of RCH2N(CH3)2. The reaction is done under ...
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Separation of Noble Metals for scrap recovery

I am researching scrap metal recovery as a side job and am hitting a wall with the noble metals. Gold, Silver, Platinum, and Palladium seem like they're all fairly easy to recover. I just can't find a ...
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3answers
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Effect of dilution on the degree of dissociation of an electrolyte

My book says that on dilution, the degree of dissociation of an electrolyte increases. Consider the reaction: $$\ce{A(aq) <=> C(aq) + D(aq)}$$ Let $\ce{A}$ be the electrolyte that splits into ...
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What is the purpose of phase matching when drawing a MO diagram?

During the lecture, we were learning how to draw the MO diagram for $\mathrm{BF_3}$. I understand that only orbitals with the same symmetry labels can interact and form molecular orbitals. My ...
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40 views

How much time does sulfur dioxide take to oxidize to trioxide in air?

I saw that $\ce{NO2}$ is oxidized really fast, but if I put $\ce{SO2}$ in a jar with air at STP, will it take hours, days or years to react into $\ce{SO3}?$
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Finding ionic radii from solubility data and density

$\pu{5.35 g}$ of a salt $\ce{ACl}$ is dissolved in $\pu{250 ml}$ of solution. The $\mathrm{pH}$ of the resultant solution was found to be $4.85.$ Find the ionic radius of $\ce{A+}$ and $\ce{Cl-}$ if ...
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Reaction of getting jarosite from pyrite

I am doing a PhD about archaeometry in order to study the contaminations and alterations that occur to the ceramics which are buried in a marine environment. In my research, I have found pyrite in ...
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64 views

Primitive Technology - Extract Silica and Sulfur from ash

Given some plant ash containing silica and sulfur, we need to find a way to extract the silica and sulfur using only resources available to a primitive person stuck on an island, with access to a ...
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51 views

What is the degree of freedom of the calcium carbonate dissociation reaction?

Question $\ce{CaCO3}$ dissociated in a closed system according to the reaction: $$\ce{CaCO3(s) -> CaO(s) + CO2(g)}$$ Assuming the reaction is in thermodynamic equilibrium, what is/are ...