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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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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Why are P−F bond lengths in phosphorus pentafluoride the same?

I found in by text that $\ce{PF5}$ has equal bond length in liquid and gaseous states. I am eager to know the reason why.
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Why is gold golden?

Bulk gold has a very characteristic warm yellow shine to it, whereas almost all other metals have a grey or silvery color. Where does this come from? I have heard that this property arises from ...
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Does bleach react with soap or other substance residues?

I soaped the cabinets and counters. Next day I used bleach based désinfectant in the cabinet where I keep dishes. Does bleach react with soap residues and vice versa? I did wipe with a wet cloth. Does ...
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Comparing axial and equatorial bond lengths in square pyramidal structures

I found this image on wikipedia: It got me wondering why the axial bond angles were shorter than the equatorial ones. I found this extract elsewhere on the internet - Extract: (ww.nrcresearchpress....
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What is the source of the concentrated sulfuric acid used in the Contact Process?

To produce sulfuric acid, we first add concentrated sulfuric acid to sulfur trioxide to produce oleum. $$\ce{SO3 + H2SO4 -> H2S2O7}$$ Then, oleum is added with water to produce two moles of ...
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Do PbCl2 and SnCl2 give chromyl chloride test?

In Concise Inorganic Chemistry by JD Lee it is said that PbCl4 and SnCl4 don't give but nothing is said about the compounds in question. Please clarify.
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Aquo metal complex structure

Draw the structure of the complex $\ce{Co(NO_3)_2*6H_2O}$ i) without and ii) with one of the nitrates being in the coordination sphere as a bidentate ligand and identify if the inversion center is ...
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Solubility of Aluminium Halides by Fajans rule

According to Fajan's rule polarizability of anion is directly related to the size and hence the covalent character would be more. Now going by this definition aluminium chloride having greater ...
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Please help me with this chemistry question [closed]

Hello guys Please help me and show me how to do this multiple choice inorganic chemistry question, I know you use pv=nrt but i need help on how to get answer, many thanks
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How many grams of sodium phosphate must be added to precipitate as much of one ion as possible?

Problem text: Solid sodium phosphate is slowly added to $\pu{200 mL}$ of a solution containing $\pu{0.002 mol}$ of aluminum chloride and $\pu{0.001 mol}$ of calcium chloride (assuming no volume ...
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Is it possible to produce sulfuric acid at large scale by oxidizing and hydrating pyrite?

I was reading The Knowledge by Lewis Dartnell, which is a book about recreating our technology from scratch should we experience a civilization-ending apocalypse. The author thinks that acquiring ...
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Why does the oxides that form change down the alkali metals?

Why does Li2O primarily form when Li has reacted with O2 but the Na2O2 forms for sodium? Moreover, the primary product for the other alkali metals are superoxides instead of oxides and peroxides. How ...
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Using solubility product to determine the mass of the precipitate of a reaction

I mix together $\pu{100 mL}$ of an aqueous $\ce{NaCl}$ solution at $\pu{0.5 M}$ and $\pu{100 mL}$ of an aqueous $\ce{AgNO3}$ solution at $\pu{0.3 M}$. Assuming that the solubility of $\ce{NaCl}$ in ...
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Why Peroxydisulphuric Acid is also called as Marshall's Acid and Peroxymonosulphuric Acid as Caro's Acid?

I recently come across the oxaacids of Sulphur and got to know to Acids, $\ce{H2S2O8}$ and $\ce{H2SO5}$ as Marshall's Acid and Caro's Acid respectively, but I am just eager to know why they are named ...
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Why is boiling point of carbon tetrachloride greater than silicon tetrachloride?

$\ce{CCl4}$ and $\ce{SiCl4}$ both are non polar molecules thus London forces must be the only forces of interaction. Then London forces are supposed to be greater in $\ce{SiCl4}$ due to its larger ...
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20 mg solid PbO2 is stirred at room temperature in 2 ml water for 10 minutes and filtered. Then KI is added [duplicate]

20 mg solid PbO2 is stirred at room temperature in 2 ml water for 10 minutes and filtered. What will happen if you treat the filtrate with aqueous KI solution? Mention the colour, state of the mixture ...
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20 mg solid PbO2 is stirred at room temperature in 2 ml water for 10 minutes and filtered & KI added [closed]

20 mg solid PbO2 is stirred at room temperature in 2 ml water for 10 minutes and filtered. What will happen if you treat the filtrate with aqueous KI solution? Mention the colour, state of the mixture ...
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What is the structure of CF3 radical?

In the class, I was told that $\ce{H3C^.}$ has a trigonal planar structure with the unpaired electron in $\mathrm{2p_z}$ orbital. But $\ce{H3C -}$ has a trigonal pyramidal structure. But why does ...
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Structure of Borax

The structure of Borax has really baffled me. Its formula is $\ce{Na2B4O7.10H2O}$ and it is formulated as $\ce{Na2[B4O5(OH)4].8H2O}$. 2 structures of Borax given on the internet are Can anybody ...
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Does NaOH react with K to form NaOK or KOH?

I realized that the $\ce{-OH}$ group when it reacts with some metal like $\ce{Na}$ or $\ce{K}$ will replace the $\ce{H}$ element to form $\ce{-OK}$ or $\ce{-ONa}$: \begin{align} \ce{H2O + Na &...
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Is beryllium an alkaline earth metal?

For context: I got a question asking, "Which of the following alkaline earth metals do not give flame colour?". I quickly marked $\ce{Be}$ and $\ce{Mg}$ and got negative marks. The following is a ...
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Why does Enthalpy of Formation of alkali metal Fluorides Decrease down the Group and for Chloride ,Bromide and Iodide Increase Down the Group?

My Question arises from the following passage The alkali metal halides, MX, (X=F,Cl,Br,I) are all high melting, colourless crystalline solids. They can be prepared by the reaction of the ...
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What is “super” in superphosphate?

This question is inspired from a previous question(marked unclear). I don't know about the context of that question but I was intrigued by a statement in that question: Superphosphate is used ...
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Why is Cr²⁺ is a good reducing agent but Mn³⁺ is a good oxidising agent? [duplicate]

The question is the same as the title states. In my textbook,[NCERT Chemistry I for Class 12 , pg no 217.] the following is written $\ce{Cr^{2+}}$ gets converted to $\ce{Cr^{3+}}$ as the +3 ...
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What is “ionic-covalent ”resonance?

Advanced Inorganic Chemistry: A Comprehensive Text on Pg. 228, Chapter 8 titled 'Boron' talks about three factors which appear to be responsible for the shortness of $\ce{B-X}$ bonds(where $\ce{X}$ is ...
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Determining stoichiometry in ICP-OES data analysis

I have questions regarding data analysis for an inductively coupled plasma (ICP) experiment from a paper by Wang et al. [1]. The generic formula for the chemical compound is $\ce{Na_{2−x}Fe[Fe(CN)6]}$...
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Why does a first order reaction only depend on the concentration of a single reactant?

I am new to kinetics so please explain it from basic, If there is a reaction - $$\ce{A + B + C -> D}$$ In first order reaction rate is given by- $\mathrm R = k[\mathrm A]$ or $\mathrm R = k[\...
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What is the lattice structure of manganese?

A transition element is defined as the one which has incompletely filled d orbital in its ground state or in any one of its oxidation state. Zinc , cadmium and mercury are not typical transition ...
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Is there a reason why we add (CH3CSNH2) but not H2S in qualitative group analysis?

Brief question: In $\ce{Cu}$-$\ce{As}$ group analysis we are expected to add thinoacetamide to make a precipitate with sulfide. Can we use $\ce{H2S}$ instead?
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calculate the number of phases and components [closed]

Calculate the number of phases and components in the following systems: i). Dilute aqueous solution of H2SO4 ii). Saturated solution of ...
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Baking Soda and Vinegar: Are there any secondary reactions?

I want to run a Lego Pneumatic Engine on the CO2 that is produced, but before I do, I want to be sure that that's the ONLY gaseous product from a real-world reaction. Everyone seems to assume that it ...
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Is pK_{In} = pH at equivalence point still true for weak basic organic indicators?

I am reading Ostwald Theory of Titration which says that indicators are organic weak acids or bases. To prove the relation that $\mathrm{p}K_\mathrm{In} = \mathrm{pH}$, the textbook uses the following ...
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Hydrogen Bonding in water

In my textbook, it is given that in a water molecule , oxygen atom can form 2 hydrogen bonds while each of the hydrogen atoms can form only one hydrogen bonds why is it so?
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Br- and I- ions give layer test, but Cl- ion doesn't. Why? [closed]

One of the questions I found in an NCERT book. Interestingly I could not find the answer anywhere on the internet. Hence, stack exchange.
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How to show the vbt structure of nitric acid?

Nitrogen in nitric acid exhibits $+5$ oxidation state (assuming $\ce{O}$ in $-2$ and $\ce{H}$ in $+1$). But given so, how do the valence orbitals overlap? The orbitals might not be hybridized as all $\...
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Balancing reactions algebraic method limitations [duplicate]

How do I balance this reaction using the algebraic method? Seems that the equation can't be solved. How do I balance such reaction and does the algebraic method has limitations and wont work for ...
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Balancing disproportionation reactions

How to balance the following disproportionation reaction $$\ce {XeF2 + H2O → Xe + XeO3 + HF + O2} $$ My attempt: I tried by making total number of reductions equal to total number of oxidation but ...
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How does Potassium Hexfluoronickelate(IV) exist in a stable state?

Nickel generally does not exist in a $+4$ Oxidation state. Wikipedia has the following to say regarding Nickel(IV): Ni(IV) is present in the mixed oxide $\ce{BaNiO3}$. ....... Ni(IV) remains a rare ...
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Why isn't the American nickel magnetic?

I never thought that modern American nickels actually contained nickel anymore. However, according to this wiki article, the coins actually do contain 25% nickel, the rest being copper. And yet, no US ...
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What are inorganic nomenclature principles used in different languages? [closed]

There are different inorganic nomenclature principles used in different languages. For example, the most used is Lavoisier's nomenclature, which is based on the higher/lower oxidation state e.g. ...
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are there any stable four membered chelate rings?

With reference to coordination compounds, most chelate rings formed with the metal atom and ligands are 5-member rings (including the central metal atom), such as complexes with Oxalate, ...
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Why can't ligands with “locked structures” undergo chelation?

The following quote is from the book Concise Inorganic Chemistry by J.D. Lee (Adapted by Sudarsan Guha), from the chapter "Coordination Compounds", page 177: ...it must be noted that $\ce{NH2NH2}$ ...
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What is the shape of [Cr(NO)₄]?

I was learning about crystal field theory recently. I am quite confused about predicting the shape of $\ce{[Cr(NO)4]}$ complex because I am not able to conclude whether it will be square planar or ...
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Noble Gases are stable [duplicate]

One of the most important concepts in chemical bonding at least with valence bond theory is that every element wants to have an electron configuration of a noble gas. But why is that? If we have the ...
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Why is the crystal field splitting energy larger for square planar than octahedral complexes?

I recently came across a fact that for the same combination of metal and ligand, the crystal field splitting energy for square planar complexes is larger than that of the corresponding octahedral ...
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Electrolytic Refining of Silver Nitrate

I read that the electrolytic refining of Silver is done using dilute silver nitrate as an electrolyte and a small percentage of free $\ce{HNO3}$. The following reactions are possible at the anode: $$\...

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