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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51 views

Do solid insoluble ions react with soluble ions in aqueous solution? [closed]

Do solid and insoluble ions (like aluminium phosphate) react with soluble ions in aqueous solution (like potassium sulfate)? When would a solid ion react with an ion in aqueous solution in general?
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Adding a base and a salt to a hydrated complex

The question goes like this: $\ce{Fe(NO3)3}$ V= $\pu{1 liter}$ and $\ce{[Fe(NO3)3]} =\pu{0.1 moles/liter}$. Calculate the $\mathrm{pH}$ of this solution using the values of $K$ given. We add a solid ...
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Has mercury(II) cyanate ever isolated as a free compound?

Recently, I have answered a question "Comparing explosive properties of mercury(II) cyanate and mercury(II) fulminate" where stability of cyanate vs fulminate was discussed. While I was ...
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Could an extremely strong reducing/oxidising agent attack nitrogen molecules? [closed]

Could a very strong reducing agent like lithium aluminium hydride or a very strong oxidizing agent like manganese heptoxide react with $\ce{N2}$? Usually when people talk about reactive substances ...
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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 $\ce{...
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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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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 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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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 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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187 views

Parallel between polarisability of donor atom and CFS strength

Observing the strength of crystal field splitting by different ligands, can the following be considered?: Most of the members in the series are ligands where the donor atom is nitrogen, oxygen or ...
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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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54 views

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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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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231 views

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
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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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2answers
205 views

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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56 views

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
95 views

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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1answer
83 views

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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1answer
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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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108 views

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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1answer
546 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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223 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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1answer
94 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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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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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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345 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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What are the most potent hydrogen peroxide decomposition catalysts available to an amateur? [closed]

Some months ago I was playing with $60\,\%$ $\ce{H2O2}$ and unknowingly I used a silver spoon to transfer the liquid from a container, and the peroxide immediately started bubbling (it did look and ...
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What is the origin of leaving group ability?

For example, during an SN2 attack: In the previous organic chemistry book that I am self-studying with, it says the fluorine atom is a better leaving group (become fluoride ion). This is because HF (...
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1answer
137 views

Reaction between ammonia and dichloromethane [closed]

Could ammonia displace a chloride in dichloromethane to form a methylammonia? If so, given enough reagents and time, could this be used to make a 3D structure comprised of nitrogen bonded carbons, and ...
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What is the correct formula for iodonium ion?

Previously, I have made a comment on user @Maurice's response to a question where he enquired about the existence of $\ce{I3+}$. I cited a paper1 which said that $\ce{I3+}$ is (apparently?) called ...
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Manganese oxide reacts with tin(IV) hydroxide?

I have a problem on my chemistry summer homework in which it asks me to predict the product of “solid Manganese-Oxide when it reacts with tin(IV)-hydroxide in aqueous solution”. My issue is that there ...
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167 views

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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How do orbitals overlap in difluorosilane? [closed]

In $\ce{SiH2F2}$ four orbitals of silicon $(\mathrm{3s},$ $\mathrm{3p}_x,$ $\mathrm{3p}_y,$ $\mathrm{3p}_z)$ overlap with two hydrogen $(\mathrm{1s})$ and two fluorine $(\mathrm{2p}).$ I want to know ...
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4answers
385 views

Help with determining concentration of magnesium hydroxide for a specific pH level

This seems like such an obvious and elementary-level question for someone who has taken high school chemistry, but yet I'm having a difficult time solving it. I need to find the right amount of $\ce{...
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2answers
199 views

Mechanism of conversion of Cr from FeCr2O4 (chromite)

The basic steps involved in the conversion of $\ce{FeCr2O4 -> Cr}$ involves, $$\ce{FeCr2O4 ->[NaOH / air, \Delta] Na_2CrO4 ->[C, \Delta] CrO3 ->[Al, \Delta] Cr}$$ Basically, I'm having ...
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1answer
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Laboratory setup for the distillation of sulfuric acid

Purification of Laboratory Chemicals, 5th Edition, by Armarego, reads (p. 53): Reagents such as water, ammonia, hydrochloric acid, nitric acid, perchloric acid, and sulfuric acid can be purified via ...
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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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Can you purify a metal oxide with a laser?

Is there any metal oxide (like aluminum oxide, titanium dioxide etc.), that can be put into a vacuum and hit with a heat source, like a laser and be converted into pure metal with a slightly weaker ...
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1answer
88 views

Reactants used for manufacturing of mustard gas [closed]

A compound 'X' which is used in manufacture of mustard gas reacts with (ozone) $\ce{NH4Cl}$ to form 'Y' and elemental sulfur ($\ce{S}$). The compound 'Y' reacts with $\ce{NaOH}$ and $\ce{Ag}$ in ...
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Determining Oxidation Number [closed]

In NH3, what's the oxidation number of H? Should it be +3 or +1? I'm a little confused what to use.
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Conversion of Erythrosine to Fluorescein

I am a home-chemist and I love dyes. I recently got my hands on sodium salt of erythrosine (tetra-iodinated fluorescein). I want to convert erythrosine to fluorescein. I speculate that using dilute ...

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