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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 can't we just boil sodium carbonate solution to make NaOH?

To my knowledge, sodium carbonate dissasociates in water to form sodium bicarbonate and NaOH: $$\ce{Na2CO3 + H2O <=> NaHCO3 + NaOH}$$ Sodium bicarbonate decomposes at temperatures above 80 ...
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Disposal of activated carbon with adsorbed hydrogen chloride

TLDR: Adsorber vessel has activated carbon with adsorbed HCl gas, that needs to be emptied to conduct inspection. (12 tons) Heated purge (under N2, 200 C) can only get 75% HCl out, rest is not ...
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Preparation of methyl red

I know that homework questions are not encouraged on stack exchange but I had to ask this as I couldn't get it's answer from any book and even Google. The question was given to us on preparation of ...
Rishikesh's user avatar
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How predictable are the decomposition temperatures of trithiocarbonates?

How do the following parameters: Ionic radius of a cation. Oxidation number of a cation. Noble metal cation vs alkali metal cation. Something else that I may not know about. affect the decomposition ...
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What reaction takes place when ammonia and sulfur dioxide are introduced into barium chloride solution?

What reaction takes place when gaseous $\ce{NH3}$ and $\ce{SO2}$ are introduced into $\ce{BaCl2}$ solution and an insoluble white solid is produced? I think that the white solid could be $\ce{BaSO4}$ ...
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How can I identify the material of this mystery gear?

I have this small gear which has sat on my desk for a couple years. I can't remember where it originally came from or what material it's made out of, so I'm hoping you can help me solve this mystery. ...
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-3 votes
1 answer
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How to dissolve Copper sulphate in oils [closed]

We need to mix copper sulphate in certain oils to prepare an antiseptic oil. For that we need to dissolve copper sulphate in oils. How to do that?
Shyam Sunder Jain's user avatar
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Phase diagram of ammonium hydrosulfide, a volatile salt

Salts (ionic compounds) usually have low volatility due to the strong ionic bond. However, there are exceptions. Smelling salts decompose and release ammonia gas. What is "volatile"? If a ...
Kevin Kostlan's user avatar
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2 answers
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Synthesizing Cyclotetrazane from Hydrazine and Diazene?

Could cyclotetrazane — a compound with nitrogen atoms arranged in a square configuration — be synthesized? A hydrogen atom would be bonded to each vertex (nitrogen atom): Could cyclotetrazane be made ...
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Variation in electronic configuration [duplicate]

Why is the electronic configuration of platinum [Xe] 4f14 5d9 6s1 and not [Xe] 4f14 5d10 6s0?
Pokemon master's user avatar
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Does solubility product dictate predominant precipitate from the solution with several ionic compounds?

While removing temporary hardness through boiling, magnesium bicarbonate will give $\ce{Mg(OH)2}.$ $\ce{Mg(OH)2}$ predominates over $\ce{MgCO3}$ as the solubility product $K_\mathrm{sp}$ of $\ce{Mg(OH)...
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Solubility or reactivity of tantalum carbide and potassium polyselenides?

It is probably an unexplored system, but is there anything known about the low temperature thermodynamic equilibrium state of this? By 'tantalum carbide', I mean $\ce{TaC}$, and by potassium ...
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Why is R₃P=O common but R₂Si=O rare? [closed]

I can understand why R₃N=O is 'rare' since for this double bond to form, Nitrogen would have to recruit a d-orbital like phosphorous does (the charge-separated model) but for N the d-orbitals aren't ...
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Presence of super rare compound Copper Peroxide?

So I'm trying to make copper acetate, and in equal parts 5% acetic acid and 6% hydrogen peroxide (slightly les H2O2 since higher concentration), I put a piece of copper metal. Immediately there was ...
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Thermostability of Metal Carbonates and Nitrates

While studying in high school, I came across the following thermal decomposition reactions: $$\ce{Li2CO3 -> Li2O + CO2 }$$ $$\ce{MgCO3 -> MgO + CO2}$$ $$\ce{PbCO3 -> PbO + CO2}$$ $$\ce{Ag2CO3 ...
Arnav Ranka's user avatar
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Manganese Oxidation States, Reverse Chameleon?

A well known experiment is where a basic sodium hydroxide and sucrose solution is added to a KMnO4 solution. The colors change from purple permanganate to green manganate to yellow/orange manganese ...
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Xe-F bond lengths and geometry of XeF6 [duplicate]

My teacher states that the geometry (not shape) of XeF6 is distorted octahedral but according to VSEPR theory I conclude it should be pentagonal bipyramidal. Please tell why is there such deviation. ...
Madhav Mittal's user avatar
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Is the Trans Influence Truly Thermodynamic or part kinetic? If the starting complex is raised by a strong σ donor, won't the products be raised too?

I am a little confused about the trans influence and trans effect, but mainly the trans influence. I think I understand the trans effect as certain ligands being able to better stabilise the ...
KKH's user avatar
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1 answer
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Hydrogen oxidation number

I am aware that since 2005, IUPAC guidelines established that hydrogen is more electronegative than all elements from group V in the periodic table (you can check official documentation). Thus, $\ce{...
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Need help with synthesis of iron (II,III) oxide (Fe₃O₄) nanoparticles

I am attempting to synthesize iron (II,III) oxide nanoparticles (Fe3O4). I have some iron acetate and have seen some literature where people have synthesized Cu nanoparticles using a polyol process. ...
assasinchop7's user avatar
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With two reagents common on Mars, fluorite and CO2, how would I produce carbon tetrafluoride?

The hypothetical terraforming of Mars would require the heating of the atmosphere. A commonly suggested method is the in-situ production of fluorocarbons, powerful greenhouse gases. For example, ...
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Solubility of lead carbonate

Lead nitrate reacts with sodium carbonate to form lead carbonate, if sodium carbonate is in excess will the white precipitate of lead carbonate dissolves ? Like in lead nitrate reaction with excess of ...
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Coordination compound isomerism

In bridging complexes, an exchange of non-bridging ligands between two metal cations gives rise to coordination position isomerism. But what if there is an exchange of bridging and non-bridging ...
Shibam Sundar Mahakud's user avatar
3 votes
1 answer
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Does chromium chromate -- Cr₂(CrO₄)₃ -- exist?

Is it possible to synthesise such a salt as chromium (III) chromate/dichromate? The intended formulas are $\ce{Cr2(CrO4)3}$ and $\ce{Cr2(Cr2O7)3}$ and they feature both trivalent and hexavalent ...
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Why do Cr and Mn have lower enthalpy of atomisation than expected? [duplicate]

Why does Mn have exceptionally low energy of atomisation than expected ? Also Cr too have low energy of atomisation different from the trend followed. Why is it so?
Chanchal Gupta's user avatar
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1 answer
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What is the nature of the bonds in BaO2 (Ionic or covalent)?

My study material mentions that BaO2 has both covalent and ionic bonds, but doesn't provide any explanation regarding this.
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The importance of nature of medium while reduction of permanganate

I was just going through some reactions related to $\ce{KMnO4}$ when I came across this. In acidic medium, $\ce{MnO4- +5e- + 8H+ -> Mn^2+ +4H2O}$ Here, the $\text{n-factor}$ is 5. In neutral (...
DarkKnight's user avatar
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Factors deciding whether acidic / basic character dominates in an amphoteric compounds

In my NCERT textbook, in the chapter 'The d- and f-block elements', the last paragraph under oxides and oxoanions of metals goes like: $...$ $\ce{V2O5}$ is, however, amphoteric though mainly acidic ...
Chem-geek0's user avatar
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Ionic Character of Metallic (Alkali Metals) Hydrides , and Reactivity

In my book , the following line has been written:- All the alkali metal hydrides are ionic solids with high melting points The ionic character , however, decreases from Li to Cs The reason being ...
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Is ammonium a coordination compound?

According to IUPAC Gold Book, the definition of "complex" is preferably called "coordination entity" which is stated that: An assembly consisting of a central atom (usually ...
Seiji's user avatar
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Behavior of polyanionic silicate chains in silico

I am trying to understand the stability of charged linear molecules, more specifically these, which contain periodically repeated high electron affinity parts, such as single-bonded oxygen (radicals). ...
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1 answer
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Why does Cs2SO4 have more lattice energy that Na2SO4?

My chemistry teacher told us that $\ce{NaF}$ has a higher lattice energy than $\ce{CsF}$. He explained it by telling lattice energy is inversely proportional to size of ions added. He then mentioned ...
Rajath's user avatar
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2 answers
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Reaction between copper rod and carbon rod in hydrochloric acid [closed]

The situation is this: a copper rod and a carbon rod, touching each other, are submerged in HCl(aq). We're asked to describe the reaction that occurs, but as far as I can see, there's no reaction? The ...
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3 votes
2 answers
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Why can't group 2B metals (Zn, Cd, Hg) form complexes with ligands such as CO, nitrosyl (NO), and olefins but do from complexes with NH3, CN- etc?

Why Group 2B metals (Zn, Cd, Hg) can form complexes with Ammonia ($\ce{NH3}$), Cyanide ($\ce{CN-}$) etc. and not with ligands such as carbonyl ($\ce{CO}$), nitrosyl ($\ce{NO}$), and olefins? What I ...
Bilal Malik's user avatar
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What effect does the weak base have here?

Suppose we reacted enough strong base to fully neutralise a weak acid, clearly at this point (the equivalence point) the $pH$ would not be $7$. This is because the reaction between the strong base and ...
nav's user avatar
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Splitting of electronic states in Tanabe-Sugano-diagrams

In Tanabe-Sugano-diagrams, different electronic transitions of term symbols of a given symmetry are shown. However, these electronic states arise due to splitting of term symbols of spherical to ...
Mäßige's user avatar
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Question Involving Bonding (VSEPR AND VBT)

So basically any chemistry book will tell you about the extent of overlapping in different orbitals. For formation of sigma bonds, head on overlapping happens. Chemistry textbooks always state that $p-...
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13 votes
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Do electrons really hang around the electrode while ions go take a swim?

This answer to this post addresses "what happens if you dip a single zinc electrode into some electrolyte solution." It explains that However, though the zinc ion can diffuse through the ...
Buck Thorn's user avatar
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Covalent network phase of CO2

In a science essay in the November 1999 edition of Analog magazine by Stephen L. Gillett¹, Gillett speculated on the possibility of a compound he dubbed "diamond ether". The name derived ...
M.Hutson's user avatar
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1 answer
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Why is Chromium hexacarbonyl diamagnetic?

So there was a question in coordination chemistry regarding the nature of $\ce{[Cr(CO)_6]}$ The book had the question under VBT and solved it using "strong ligands cause all electrons to pair up&...
Aurelius's user avatar
-2 votes
1 answer
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Hydrated salts of transition metals

I am a little confused when it comes to hydrated salts and transition metals. When it comes to non transition metals like $\ce{Mg}$, we can clearly have $\ce{MgSO4.xH2O}$. However, when it comes to an ...
nav's user avatar
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3 votes
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The formula of ammonium phosphomolybdate

It is written in my qualitative chemistry textbook that phosphate could be tested by introducing phosphate, nitric acid and ammonium molybdate which gives (NH4)3H4[P(Mo2O7)6]. I found out in the ...
Seiji's user avatar
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Is Fajans Rule valid for polyatomic anions?

In my textbook its mentioned that BeCO3 (beryllium carbonate) is an ionic compound, but going according to fajans rules, small cation with high charge density and large anion should give a majorly ...
Catastrophic Cow's user avatar
6 votes
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435 views

How to explain oxidizing power from Molecular Orbital Theory

I am trying to explain the oxidizing property of $\ce{Fe^3+}$ in $\ce{H2O}$ and $\ce{CN^-}$ which is $\ce{[Fe(H2O)6]^3+}$ and $\ce{[Fe(CN)6]^3-}$. The electrochemical reactions along with their ...
Shira's user avatar
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3 answers
253 views

Is it true that inorganic compounds cannot be synthesized by living things?

Inorganic means not organic. In biology, they are compounds such as water, minerals, acids, bases and salts that are found in the structure of living things but are not living things or are not ...
Bilgehan Yılmaz's user avatar
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1 answer
104 views

Can phosphorous penta hydroxide [P(OH)5] exist? [closed]

I was looking at the oxyacids of Phosphorous and it is given that (in Wikipedia article of "Phosphorous acid"), some of these acids (Eg: $H_3PO_2$ and $H_3PO_3$) exist in a dynamic ...
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synthesis of Red Lead, Pb3O4

I have tried heating $\ce{PbCO3}$ at $\pu{400 ^\circ C}$ temperature to form $\ce{Pb3O4}$. After sometime of heating, only a layer of $\ce{Pb3O4}$ is made and the reaction does not complete. The ...
Jak's user avatar
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What are some general chemistry textbook with good problems? [duplicate]

I’m currently in a General Chemistry course and am wondering if you guys can recommend me a textbook or resource where I can find good problems to work through and further my understanding. We’re ...
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I have fabricated a starch film impregnated with calcium carbonate, and the film is showing hydrophobic behaviour after addition of calcium carbonate

I have fabricated an extruded starch film, impregnated with calcium carbonate. After addition of calcium carbonate the contact angle of the film has risen suggesting a more hydrophobic surface. I have ...
Kshitij Madhu's user avatar
3 votes
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Copper reaction with nitric acid

According to this paper, the green colour from the reaction of copper and nitric acid could be explained: The color is greenish, probably as a result of a combination of the pale-blue color of the ...
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