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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Oxidation of sulfur dioxide to trioxide and its decomposition under same condition at higher temperature

I found that $\ce{SO2 + 1/2 O2 -> SO3}$ when catalysed by platinum and heated to $\pu{700 ^\circ C}$. On the other hand I found that $\ce{SO3 -> SO2 + 1/2 O2}$ with same catalysator and ...
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On basic mercury salts

$\ce{HgCO3.3HgO}$ and $\ce{HgO.Hg(NH2)Cl}$ are called basic mercury carbonate and basic mercury amidochloride, respectively. I found this thread on the former; I've only seen the latter as the product ...
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Coordination complex - nitrito-N & nitrito-O

I am currently learning the coordination compounds and encountered a new isomerism called linkage isomerism. I am thinking that if I want to get some $\ce{[Co(NO2)6]^3-}$, I should have to dissolve $\...
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Can any one list the set of fundamental unsolved questions in coordination chemistry? [closed]

I am interested in unsolved problems in coordination chemistry, from particular cases to the most fundamental phenomena. Thanks in advance
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Does Copper(I) Iodide have a dimer?

A qualitative test for the iodide ion involves reacting the salt solution with copper sulphate. This is said to yield the triiodide ion and the white precipitate of $\ce{Cu2I2}$. I haven't been able ...
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How to compare volatility of inorganic acids

Extending This question further Sulfuric acid because of its low volatility can be used to manufacture more volatile acids from their corresponding salts To use this statement in practice I need to ...
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Electron configuration using periodic table [closed]

I need to find electron configuration for an element beyond 118 (I don't want to tell the element's atomic number 'cause I need to find the electronic configuration). I'm able to find electronic ...
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Phenolphthalein + sodium carbonate and phenolphthalein + sodium bicarbonate [closed]

What would the word equations be for the following two situations? Initially $\ce{Na2CO3}$ and $\ce{NaHCO3}$ were present as 2 unknown powders, dissolved in water, and phenolphthalein was added to ...
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Why does calcined feldspar crumble?

For context, I am a potter and am interested in collecting and processing all materials that I use by myself. One of the processes which I use is calcination of certain minerals like feldspar, so that ...
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Titration of weak acid and strong base at low concentrations [duplicate]

Titration continues until one of the reactants (the one in conical flask) turns out to be a limiting agent as far as I know. From the titration of a weak acid and a strong base, I could learn that the ...
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Determining the direction of electron transfer in a coordinate bond [closed]

I am curious as to how electron transfer takes place in a co-ordinate bond in complexes. Take for example, the nitrito-$\ce{O}$ molecule, where $\ce{M}$ is a metal, $$\ce{M<—O—N=O}$$ In the ...
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How to find the percentage yield of hydrated copper(ii) sulfate [closed]

Hydrated crystals of copper(ii) sulfate-5-water were prepared by the following reactions CuO(s)+H2SO4(aq)= CuSO4(aq)+H2O(l) CuSO4(aq)+5H2O(l)= CuSO4 • 5H2O(s) In an experiment, 25.00cm3 of 2.0mol/dm3 ...
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Stability of α, β, γ allotropes at different temperatures

While reading about elements or compounds I often come across allotropes (or forms) being referred to as α, β, γ forms. Examples: Sulfur has two allotropes: α rhombic and β monoclinic. Out of these ...
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Determining difference between co-ordination complexes of copper [duplicate]

What's the difference between the co-ordination compounds $\ce{Co.(H2O)6}$ and$\ce{[Co(H2O)6]^2+}$?
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Ambiguity in the direction of dissolution equilibrium

The following reaction is usually carried out to test for the carbonate anion in an inorganic salt; $$\ce{CO3^2- +BaCl2/CaCl2 -> BaCO3/CaCO3(s) + 2 Cl-}$$ The resulting carbonate is stated to be an ...
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What am I doing wrong in calculating the lattice enthalpy using the Born-Mayer equation? [closed]

I was tasked with calculating the lattice enthalpy of silver iodide using the Born-Mayer equation. To do this, I used the equation given to me: $$H_L = \frac{N_A|Z^+Z^-|e^2}{4\pi \epsilon_\circ d}\...
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Does NaOH react with O3 to produce NaO3?

I read two reactions which I want to specify first: $\ce{Na2O2 + O3 + H2O -> 2NaOH + 2O2}$ $\ce{2KOH + 5O3 -> 2KO3 + 5O2 + H2O}$ Does $\ce{NaOH}$ also undergo a further reaction to produce $\...
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Dead trees or charcoal is generally used as a reductant in the production of pure silicon for use in industry what other reductants could be used?

What other known reductants for SiO₂ could potentially be used for producing silicon from silica in an arc furnace? Read more: http://www.madehow.com/Volume-6/Silicon.html#ixzz6uKynirns
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Can the viscosity of a liquid change from day to day? [closed]

If temperature is the same, same meter is used and all other things be the same, can the viscosity change from one sample to another? Thank you Shaun
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Determination of the molarity of the diluted vinegar [closed]

Procedure of determination of acetic acid in vinegar 10 ml of vinegar is diluted with distilled water to the mark in a 100 ml of volumetric flask. Then, 20 ml of this diluted vinegar is pipetted into ...
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if we force a gas to condense by adding pressure, does the temperature increase?

I understand that due to latent heat there is no increase in temperature during phase change because the energy is being used to form or break inter-molecular bonds not increase kinetic energy. What ...
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Why are the two bonds in sulphur dioxide identical? [duplicate]

Triatomic molecules are either linear or bent. If we analyse the $\ce{SO2}$ molecule, it turns out that it is bent. I know that $\pi$ bonds do not alter shape, but merely the bond lengths. Now since ...
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Debye–Waller factors for tin(IV) oxide

How I could find the bulk Debye–Waller factor for tetragonal rutile type $\ce{SnO2}$ at room temperature? I have been doing some online digging with no luck. If anyone has a reference I could use that ...
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Disproportionation reaction of dimeric sulphur monochloride

I read that group-16 monohalides exist in dimeric forms ex. $\ce{S2Cl2,Se2Cl2,Se2Br2}$ etc. It also states that these dimeric halides undergo disproportionation reactions and gives an example as ...
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Aren't isothiocyanate and thiocyanate ligands monodentate?

I will keep it brief; if I generalize what an assignment is telling me, then a metal complex with 2 (iso)thiocyanate ligands would be named "bis(isothiocyanate)...metal(oxidation state) or bis(...
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Qualitative analysis of a solid yellow inorganic compound [closed]

I have a pure inorganic compound that is bright yellow powder/crystals. It is insoluble in water and very poorly soluble in $\ce{HCl}$. It is soluble in hot nitric acid ($\ce{HNO3}$). When dissolved ...
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Ddetermining dissolution in solvents

In recent chemistry class , I learnt that like dissolves like I was told following points- Ionic solutes are highly soluble in polar solvents like water, ammonia etc. Reason: The ion-dipole ...
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About the reaction of Nafamostat [closed]

In this case, doesn't it imine react? I think that only ester part is hydrated though..
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Bond lengths in Fullerenes [duplicate]

I came across this about fullerenes- All carbon atoms are equal and the undergo sp2 hybridisation. Each carbon atom forms three sigma bonds with three other carbon atoms. The remaining electron at ...
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How magnesium sulfate can get burned at 250°C? [closed]

i tried to dehydrate epsom salt, but I don't understand how I could get it burned little bit. What get burned to what? Based on my understanding, heptahydrate decomposes at 150 °C to monohydrate which ...
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What is calcined lawsonite?

For context, I am planning to try and use this sample to make a ceramic glaze. I recently collected a sample of what I think is lawsonite, which has the chemical formula $\ce{CaAl_2Si_2O7(OH)_2*H_2O}$....
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Melting and Boiling Point

I learnt that the gas has a very low melting and boiling point. But since gas is already present in gaseous form, then how it can melt or boil and if so then how it has a melting and boiling point?
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Is considering HVO3 + n ROH = HVO3(ROH)n as an endothermic reaction logical?

Here is an article on vanadium solvent extraction with 2-ethyl-1-hexanol: Separation and Purification Technology 2017, 188, 358-366 The suggested extraction reaction is HVO3 + n ROH = HVO3(ROH)n, ...
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Why are calcination and roasting processes carried out at a temperature just below the ore's fusion temperature?

I had read about the two important methods used for the concentration of an ore - Roasting and Calcination. I have a doubt regarding why both the methods are carried out at temperatures not above the ...
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How to apply the Fajans' rules?

Outside of bonds between metal atoms=metallic bonds, non-metals=covalent bonds (molecules), it is difficult for me to determine what kind of bond it is. I know that in the rule metals and non-metals ...
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Hybridization of tetraamminecopper(II) [duplicate]

So I wanted to find out all details including hybridization, number of unpaired electrons and dipole moment, etc. for the compound $\ce{[Cu(NH3)_4]^2+}$ Does anyone know why? Here is what I found on ...
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Reason for sodium chloride to show colour in flame test [duplicate]

My textbook states the following: The alkali metals and their salts impart characteristic colour to an oxidizing flame. This is because the heat from the flame excites the outermost orbital electron ...
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Is Chromium (VI) fluoride possible?

Chromium (VI) fluoride, also known as chromium hexafluoride is a possible chemical compound with a chromium atom attached to 6 fluorine atoms. It has been unsuccessfully synthesized a number of times ...
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Why is the melting point of magnesium nitride less than that of beryllium nitride?

Why is melting point of $\ce{Mg3N2}$ lower than that of $\ce{Be3N2}$ ? I have two reasonings: The lattice energy of $\ce{Be3N2}$ is higher than that of $\ce{Mg3N2}$ so accordingly the melting point ...
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Why is nitrogen gas collected over water?

In Duma's method, we need to collect Nitrogen gas over water and subtract the aqueous tension. But why can we not just collect it over the air?
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Identification of salts observed in steam vaporiser

Recently I observed some precipitated salts in steam vaporizer after completion of vaporization. I am guessing that some of the white particles may be calcium carbonate ($\ce {CaCO3}$) formed from ...
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Significance of p functions in compounds of the lighter alkaline and alkaline earth metals [closed]

It is often said that lithium follows the duet rule instead of the octet rule, in the sense that there is no practical difference in, say, energies or shapes of lithium-containing compounds, whether ...
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Finding the valency of transition metals in coordination complexes

I understand how to find the valency of atoms in small organic compounds. For instance, for CH4, the valency of carbon is 4, while the valency of each hydrogen is 1. But for a coordination complex, ...
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Is “double dot” (“··”) notation used for a double radical?

I wondered if this was a typo in the notes given to me. I haven’t come across notation like this before: Branching — steps in which number of radicals increases (can lead to explosion) $$\ce{H^. + O2 ...
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How to compare softness of base

I've searched on net which provides a lost of hard bases and soft bases . Is there a logical way to compare the relative softness of bases I have a list of bases $CH_3NC$ and $ CH_3CN$ $F^-$ and $H^...
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What is the reaction mechanism between boric acid and 2-ethyl-1-hexanol

Here is a photo from an article, Hydrometallurgy 2016, 160, 129–136 This indicates the reaction mechanism as esterification. However, the written reaction equation ($\ce{H3BO3 + nROH -> H3BO3.nROH}...
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Hybrid lobes of sp3d2 and sp3d3 [closed]

It's known that $\ce{sp^3d}$ hybridization has 5 lobes; 3 equatorial with $\ce{sp^2}$ lobes and 2 axial with $\ce{dp}$ lobes. Do we have such splitting in $\ce{sp^3d^2}$ and $\ce{sp^3d^3}$ ...
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About the acidity of Sultiame [closed]

Why is sulthiam base even hough sulfur can accept the electron by resonance from nitrogen like carbonyl group do?
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About the acidity of phenytoin

Can you explain why phenitoin is weak acid even though nitrogen is base? Does carbonyl group always make structure acid? If this structure doesn't have carbonyl group, would it be base not acid?
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Does lead(II) chloride dissociate into Pb²⁺ and Cl⁻ ions in HCl?

While solving JEE Advanced 2020 (Paper 2) questions, I came across this particular question: Q.10 Choose the correct statement(s) among the following. (A) $\ce{SnCl2 · 2 H2O}$ is a reducing agent. (B)...

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