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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Could an extremely strong reducing/oxidizing agent attack N2 molecules?

Could a very strong reducing agent like lithium aluminium hydride or a very strong oxidizing agent like manganese heptoxide react with N2? Usually when people talk about reactive substances they ...
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What surface treatment can turn nickel black?

Questions: The detailed surface treatment to turn nickel plated steel black. The reaction mechanism of the process. Methods: (preferred) Anodizing, oxidizing : The only black nickel oxide is Ni2O3 ...
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What Chemical could this be? [duplicate]

I am trying to work out if this is a chemical and if so what chemical it could be? If not what else could it be? I did a previous post but my drawing was not correct as was highlighted by someone else ...
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Backbonding in phosphorous pentoxide

I read this today in a book that $\ce{P=O}$ in $\ce{P4O10}$ consists of a coordinate bond and pπ-dπ backbonding, but why does this happen? Can't phosphorus share its lone pair with one of the lone ...
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i need help for this question [closed]

Consider the decomposition of hydrogen peroxide reaction. If the rate of decomposition of hydrogen peroxide at a particular temperature is determined to be 0.098 mil/(L•s), what are the rates of ...
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What Chemical Could This Represent [closed]

Update I found someone else who has been trying to solve the same problem and they said that my drawing was not correct. We had a discussion and I conceded that his monochrome picture is more square ...
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How can I make hydrochloric acid from hypochlorus acid and hydrogen peroxide [closed]

Can I make $\ce{HCl}$(aq) by reacting $\ce{HOCl}$(aq) and $3$% aq. $\ce{H2O2}$ to form $\ce{HCl}$(aq) and $\ce{O2}$(g)? Would storing it for week in a closed bottle work? If not, then what should I ...
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How can I bring down the pH of corrosive substance leaving its physical properties intact [closed]

I am developing geopolymers with with kaolinite clay, calcium hydroxide activated with sodium carbonate solution. The alkalinity of the mix is too high to handle.. what can i do to bring it down
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Why is CrF5 the only halide in which Cr5+ exists?

I'm referring to b) and c) in the picture below. It's a past exam question that I still can't wrap my head around and was hoping you could help! I know it has something to do with the stability of the ...
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Reaction of copper with nitric acid [closed]

$\ce{Cu}$ reacts with $\ce{HNO3}$ though $\ce{Cu}$ cannot replace $\ce{H}$ due to its less reactivity. Then, why does it react with $\ce{HNO3}$?
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Xe compounds - without O or F

I may be wrong, because this is purely based on observation-Is it true that Xe does not form compounds without O or F? If yes, could you please elaborate the reason behind it? (I have a basic ...
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Why doesn't PH5 exist? [duplicate]

I have a basic understanding of VBT, hybridisation and VSEPR. However, I still can't come up with a reason as to why $\ce{PH5}$ doesn't exist while $\ce{PH3}$ and $\ce{PCl5}$ do. Can anyone please ...
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Order of stability of allotropes of phosphorus

I want to know the stability order of allotropes of phosphorus. Upon searching I realised that two types of stabilities are defined in their case kinetic thermodynamic But I am somewhat confused (...
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How to get or understand a sample in chemistry without knowing its chemical name or compound or formula [closed]

How to get or understand a sample in chemistry without knowing its chemical name or compound or formula? I was thinking about whether there is a way to understand what the chemical compound sample ...
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Why does Tin form Sn+2 in an acidic medium, not sn+4? [closed]

As sn+4 is more stable than sn+2 it should form sn+4! Answer of this question is 2
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Lewis structure of R-COO-Na+ [closed]

I am studying Lewis structure and I have a question about an excercise. The question asks what is the Lewis structure of $\ce{R-COO^-Na+}$. I don't know how to draw it correctly.
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Why cupric ion oxidises iodide to iodine

I have learnt in the qualitative analysis of cupric ions that upon treating its aqueous solution with excess $\ce{KI}$, triiodide ions are formed which can be further tested using starch. The ...
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Parallel between polarisability of donor atom and crystal field split strength

Observing the strength of crystal field splitting by different ligands, I drew up the following: Most of the members in the series are ligands where the donor atom is nitrogen, oxygen or carbon. If ...
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The color of the most sulfides of p- and d-block elements

My teacher said that many of the sulfides of d-block and p-block are black. Why?
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Formation of Goethite

Probably a simple question: When you're mixing potassium hydroxide ($\ce{KOH}$) with iron nitrate ($\ce{(FeNO3)3}$) to form ferrihydrate, does the temperature have to be below $\pu{60 ^\circ C}$?
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Hydrolysis of magnesium boride

Does magnesium boride react with water to form boranes? My attempt: Magnesium nitride reacts with water to form ammonia and magnesium hydroxide. Similarly, does magnesium boride also react with water ...
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How to find the stoichiometric amount of nitric acid reacting with tin?

To find the amount of $\ce{HNO3}$ behaving like an acid in the reaction $$\ce{Sn + HNO3 -> Sn(NO3)2 + NH4NO3 + H2O},$$ I first balanced the reaction using oxidation number method which gave me $$\...
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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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Inorganic chemistry - please suggest! [duplicate]

Can any one suggest a book of inorganic chemistry that has a lot of problems? Both Mcqs and subjective questions should be there. And the textbook should also be useful for chapters about reactions ...
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Electronic Configuration of Lanthanum [duplicate]

Lanthanum has electronic configuration [Xe] 4f0 5d1 6s2. Why is the 4f sub-shell not filled even though we know that 4f is filled before 5d subshell? I know that for some elements energy level of 4f&...
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Why is phosphorous pentoxide a dehydrating agent?

$$\ce{HNO3 + P2O5 -> 2HPO3 + N2O5}$$ In this reaction, both nitrogen and phosphorus have the same oxidation number before and after the product is formed. Since the $+5$ oxidation of nitrogen is ...
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Separating sodium sulfate from chromium trioxide solution

I was looking at the industrial process for the production of chromium trioxide by treating sodium chromate or the corresponding sodium dichromate with sulfuric acid. This results in the formation of ...
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2answers
470 views

Can you turn lead dioxide into lead?

I've read that you can reduce lead oxide to lead by heating it with carbon. Does this also work with lead dioxide? I took apart an old lead-acid car battery and realised then, that there are almost ...
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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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Can the unshared electrons present in D block metals can be considered as lone pairs?

Having doubt,how to decide whether an unshared pair of electrons is lone pair or not.. Another doubt I have is that VSEPR theory states that the lone pairs influence shape of compounds..do the same ...
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Why does an mercury ore exist as HgS?

Cinnabar($\ce{HgS}$) is one of the most common ores of mercury. Why does it not exist at $\ce{HgO}$ or some other such compound? Is there any reason for why it is so prevalent? Does it react less ...
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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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1answer
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Why is polonium tetrafluoride non-existent?

I learnt that the group 16 elements can form halides, but with the exception that polonium cannot form a tetrahalide with fluorine. However, I thought that it was possible. This is because the ...
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Why does this ligand form 6-coordinate complexes with Transition elements and 8-coordinate complexes with Inner transition elements? [closed]

What change takes place in the denticity of this ligand if it is an inner-transition metal ion vs a common transition metal? Primarily, why does the ligand behaves differently with the two situations ...
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How are solutions prepared from hydrated compounds? [duplicate]

Preparation of solutions from hydrated compounds
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What grade of sodium fluoride is needed for preservation of urine for drug and alcohol testing?

We are preparing DUI test kits and the distributor we purchased our sodium fluoride vials from is no longer in service. We are having difficulty finding a new supplier. Would food grade work for ...
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Potassium tetraoxalate preparation [closed]

How is potassium tetraoxalate produced industrially? In fact How I can limit the reaction of $\ce{H2C2O4}$ and $\ce{KOH}$? Or is there any other route for this purpose?
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Hydrolysis of alkali and alkaline earth metals

Which of the following cations are not hydrolysed in aqueous solution? 1) $\ce{Mg^2+}$ 2) $\ce{Ca^2+}$ 3) $\ce{Na+}$ 4) $\ce{K+}$ I thought nothing would undergo hydrolysis, so all the options would ...
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Covalent character in group 12 chlorides

What is the correct order of covalent character of $\ce {HgCl2}$ , $\ce{CdCl2}$ and $\ce{ZnCl2}$? Different sites seem to give different answers. My perception is that the covalent character should be ...
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Reducing pressure and calculation of concentrations at equilibrium

For the equilibrium $$\ce{PCl5(g) <=> PCl3(g) + Cl2(g)}$$ $$ K_c = \pu{4.16E-2 mol dm^{-3}}~\text{at}~\pu{250 °C}$$ $$[\ce{PCl3}] = [\ce{Cl2}] = \pu{0.204 mol dm^{-3}}$$ If the pressure of ...
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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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51 views

Comparing explosive properties of mercury(II) cyanate and mercury(II) fulminate

I found this question online on Jiskha Homework Help: Of the compounds mercury(II) cyanate, $\ce{Hg(OCN)2},$ and mercury(II) fulminate, $\ce{Hg(CNO)2},$ one is highly explosive, the other is not. ...
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How to chemically mix silicon rubber liquid and calcium carbonate

chemically means that will fulfill the requirements of chemical mixture, substance , compound etc. to make a pigment. what basic properties do we need to see when mixing two chemicals for perfect ...
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176 views

Disproportionation of silver(I) in aqueous solution

Use the following equations to predict whether or not $\ce{Ag+}$ ions will disproportionate in solution: $$ \begin{align} \ce{Ag+(aq) + e- &-> Ag} &\qquad E^\circ = \pu{+0.80 V}\\ \ce{Ag^2+(...
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80 views

Is it easier to oxidise iron(II) to iron(III) in acidic or alkaline solution? [closed]

Is it easier to oxidise $\ce{Fe^2+}$ to $\ce{Fe^3+}$ in acidic or alkaline solution? $$ \begin{align} \ce{Fe &-> Fe^2+(aq) -> Fe^3+(aq)}\\ \ce{Fe &-> Fe(OH)2 -> Fe(OH)3} \end{align}...
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What is the chemical formula for the synthesis of Hydroxyapatite (Ca10(PO4)6(OH)2)?

This might be a basic question but I am a little confused. I have some lecture notes that says calcium phosphate ($\ce{Ca3(PO4)2}$) reacts with calcium hydroxide ($\ce{Ca(OH)2}$) to form ...
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Is there an error in a Wikipedia article explaining the influence of oxidation states?

Referring to the series of oxoacids of chlorine: $\ce{HClO, HClO2, HClO3},$ and $\ce{HClO4}$, tabulated in the Wikipedia article on electronegativity, the article states, in the section near the end ...
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1answer
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Side product obtained in reduction of cuprous oxide with carbon

So my book sates that in the extraction of cuprous oxide, the following reaction takes place. $$\ce{Cu2O + C -> 2 Cu + CO}$$ This makes sense to me, if it is seen as the following two reactions ...
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83 views

Dissolution of iron(III) hydroxide

Problem From the theoretical tour of the Mendeleev Olympiad in Chemistry: a) Calculate the minimal amount of sulfuric acid that should be diluted with water to yield $\pu{100 mL}$ of solution that ...
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2answers
203 views

Comparing bond angles in carbonyl dichloride and carbonyl dibromide

Background I was studying VSEPR and hybridization theory and one of the popular questions in many textbooks was comparison of bond angle of $\ce{NH3}$, $\ce{NF3}$ and $\ce{NCl3}$. $\ce{NF3}$ had ...

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