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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What is a non-organic analog of a metabolic pathway?
The wikipedia page on the Belousov-Zhabotinsky reaction states the following:
The discovery of the phenomenon is credited to Boris Belousov. In 1951, while trying to find the non-organic analog to ...
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why does PCl4+ , PBr4+ and PF4+ have equal bond angles [closed]
The listed species undergo sp3 hybridization.Due to decreasing electronegativity down the halogen group the electrons in the P-X bond are less attracted by the X group when we go down the group.This ...
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Synthesis of active chemical manganese dioxide (CMD) for primary alcohol oxidation
This paper1 uses chemical manganese dioxide (CMD) instead of activated manganese dioxide for mild alcohol oxidation. I'm looking for a route on how to synthesize active CMD. Could this work?
$$\ce{...
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Maximum covalency of sulphur
Why does sulphur stop at 6 bonds?
Why can't it form 9 bonds because even after forming 6 bonds,it has empty d orbitals?
And even if we consider steric factors, then why in the structure of sulphate ...
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What chemistry topics should I learn if I have to do research in microfabrication (ex. photolithography) and ionic liquids (QSPR, synthesis)?
I'm starting a PhD and my research topic involves microfabrication (photolithography, etc.) and also ionic liquids (including QSPR and possibly synthesis). The thing is, I know close to nothing about ...
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Comparing intensity of colour in coordination compounds
I had given an examination recently in which the question asked was:
Write the decreasing order for the intensity of color in $\ce{[CoCl4]^{2-}}$, $\ce{[Co(CN)4]^2-}$, $\ce{[Co(H2O)6]^2+}$
What my ...
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How many orbitals are possible for n=4? Which of these may be described as gerade? [closed]
How many orbitals are possible for n=4? Which of these may be
described as gerade?
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Selection of p-orbital(s) when considering sp or sp2 hybridisation
I am considering $z$-axis as the internuclear axis in all cases.
When we consider overlap of s and p orbital to form a $\sigma$-bond, the chosen orbital must be p$_z$ orbital for a proper overlap.
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How to balanced the equation and how to find the number of moles used in the titrations [closed]
You are required to standardize a dilute solution of sulphuric acid, and undertake the following steps:
(i) 4.805 g of solid sodium tetraborate (Na2B4O7) are added to a 250 mL volumetric flask, and ...
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Palladiam (ii) chloride white crystal? [closed]
I am experimenting PCB through hole plating. I went to a chemical store to buy palladium (ii) chloride. They gave me 2 different prices. $110 for 1gm germany made and only $30 for Indonasian made!!! ...
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What should be the IUPAC name of (NH3)5Co-NH2-Co(NH3)4(H2O)]?
What should be the IUPAC name of $\ce{(NH3)5Co-NH2-Co(NH3)4(H2O)]}$?
This is similar to $\ce{[(NH3)5Co-NH2-Co(NH3)5](NO3)5}$, i.e. μ-amido-bis[pentaamminecobalt(III)] nitrate. But the two parts are ...
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In cation analysis, can reagents of higher group precipitate lower group cations?
My teacher told me that Al$^{3+}$ and Zn$^{2+}$ hydroxides are frequently precipitated together and that is why we have to be careful about the concentration of base (NH4OH) added.
Does this mean that ...
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Why is beryllium hydroxide amphoteric?
When we react beryllium hydroxide with acid we have an acid base reaction resulting in a salt and a water molecule. Similarly when we react it with base it results in formation of a salt. Most ...
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Copper and Iron Halides stability [duplicate]
Iron(2)Iodide exists but Iron(3)Iodide doesn't, this is due to the size of Iodine and Copper(2)Iodide also doesn't exist as Iodide ion is a very strong reducing agent. Can anyone give a clear ...
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Sodium hydroxide reaction with manganese dioxide [duplicate]
I came across a website that said it is possible for sodium hydroxide to react with manganese dioxide at temperatures near 0 degrees Celsius. The reaction goes:
2MnO2 + 3NaOH ⇄ MnO(OH) + Na3MnO4 + H2O
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Is chlorine gas evolve from the reaction between manganese dioxide sodium hydroxide and bleach? [closed]
Apparently the overall reaction would be
$$\ce{2 MnO2 + 3 NaClO + 2 NaOH -> 2 NaMnO4 + 3 NaCl + H2O}.$$
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How can I make cerium(IV) chloride? [closed]
How can I make $\ce{CeCl4}$ from either $\ce{CeO2}$ or $\ce{Ce(SO4)2*4H2O}$?
I have some ideas but am worried I'm going to mess it up since this is the first time I've worked with lanthanides.
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1answer
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Why do boron salts impart a characteristic green colour to the flame
In salts of boron it exists as a cation in the B(III) form. It is known to impart green colour in several of its salts like borates, boron triflourides, boric acid etc. If there are no electrons in ...
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Does exposure to a lead zirconium titanite (PZT) piezoelectric sensor cause poisoning? [closed]
I have used small metal piezoelectric discs for some experiments. I have touched the coating on one side multiple times over a few years, and apparently the material used is a lead compound called ...
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Raising melting point of water at STP (using disolved impurities)
Typically, water experiences melting point depression when it is impure. The more impure it is, the lower the melting point, up to a point.
I understand you could raise the melting point by increasing ...
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What fumes are created/what is the product of C4H4ClNOS (Methylchloroisothiazolinone) when 10% NaHSO3 (sodium bisulfite) is applied?
What fumes are created/what is the product of $\ce{C4H4ClNOS}$ (Methylchloroisothiazolinone) when 10% $\ce{NaHSO3}$ (sodium bisulfite) is applied? The $\ce{C4H4ClNOS}$ is in dried residential paint, ...
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Which structure is correct for $PF_3C _2$ [duplicate]
$PF_3C _2$ There are two structures among which I want to confirm which one is correct for this :
In this picture which is common for both is that bond angles between equatorial positions is 120 ...
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How to separate Cu and Ni from alloy containing different metals such as Al, Cu, Ni, (Zn, Pb, Sn < 5%)?
I have an alloy containing different metals such as Al, Cu, Ni, (Zn, Pb, Sn, Ag, Si in small amount < 5%). How can I separate Cu and Ni from this alloy?
I tried to dissolve alloy in sulfuric acid, ...
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2answers
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Redox reaction between Potassium thiocyanate and iodine
How would you balance the following redox reaction in acidic medium?
$$\ce{KSCN + H2O + I2 -> KHSO4 + HI + ICN}$$
In this reaction, it seems the sulfur is being oxidized but iodine is undergoing ...
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Why cannot HF form dative bonds with transition metallic ions?
Since fluorine in HF has three lone pairs of electrons, but why does it still cannot form dative bonds?
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Can nitric oxide(NO) reduce Xenon Fluorides
I came across the following question:
$\ce{XeF_4}$ on reaction with gaseous nitric oxide forms Xenon gas and (P).Find the total number of lone pairs present in one molecule of P.
As far as Xenon ...
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Why does the stability of halide ions in aqueous solution increase down the group despite smaller ions having higher charge density?
The acidic strength order of hydrogen halides is HI > HBr > HCl > HF, and to explain this my teacher said that in aqueous solution the stability of their conjugate bases is I- > Br- > ...
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1answer
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how to show the coordinate bond in avogadro?
I have this structure figure 1, I want to visualize by Avogadro, but the shape is not as I want like in figure 2 where I used Molden, so how can I make Avogadro draw the coordinate bonds.
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What is the correct molecular orbital diagram for the d orbitals in platinum for the tetraammineplatinum(II) complex?
I am trying to construct the diagram of $\mathrm{d}$ orbitals in the tetraammineplatinum(II) complex. According to the angular overlap model, $\mathrm{d}$ orbitals are going to look like those in the ...
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Towards a hard Lewis base like water which is the stronger Lewis acid, silicon tetrachloride or tin (IV) chloride?
On Pauling scale, both $\ce{Si}$ and $\ce{Sn}$ have electronegativity value of $\mathrm{1.9}$. The difference is in size of d-orbitals which accept lone pair of electrons. $\ce{Si}$ has vacant 3d-...
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Effect of metal identity on CO bond length in carbonyl complexes
In organometallic carbonyl complexes, a back-donation effect occurs: the σ molecular orbital of CO yields electron density to an orbital of the appropriate metal atom, and in turn, a d orbital of ...
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Limitations on the 18-electron rule
The 18-electron rule and the corresponding methods for counting the total valence electrons of transition metal complexes are among the most useful basic tools in modern inorganic chemistry, ...
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How exactly does a buffer made up of a weak acid and its conjugate base work upon addition of hydroxide ions? [duplicate]
Consider a buffer solution containing a weak acid and its conjugate base ($c_\mathrm{total} = \pu{0.1 mol L-1}$):
$$\ce{HA <=> H^+ + A^-}$$
When $\ce{H+}$ ions are added (from a strong acid), ...
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1answer
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Association constant calculation in 3:1 complexes
I have a question about calculating the association constant related to 3:1 host-guest complexes. I am using the UV-vis titration method, I know the stoichiometry from the molar fraction method which ...
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1answer
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What is the n-factor for reduction of chromate(VI) to chromium?
Here a reaction is given:
$$\ce{CrO4^2- -> Cr}$$
I don't know the full reaction, but I made some estimates. One estimate was that on balancing charges we get two electrons on right-hand side.
I ...
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Doubt on Nomenclature of oxa-acids of PBLOCK elements please share your valuable knowledge? [duplicate]
I know how to draw the structure of these compounds but don’t know reason behind why they got ortho,meta,pyro etc.. before their name
Why h3po4 is called {orthophosphoric acid(why it is given ortho ...
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1answer
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Reactions of P2O5 and P4O10 with sulfuric acid [closed]
I have seen two reactions of $\ce{H2SO4}$, in one it reacts with $\ce{P2O5}$ and in the other $\ce{P4O10}$.
The Reactions are as follows:
$$\ce{H2SO4 + P2O5 -> SO3 + 2HPO3}$$
$$\ce{6H2SO4 + P4O10 -...
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The Systematic IUPAC name of hydrogen sulfide [duplicate]
Why the Systematic IUPAC name of $\ce{H_2S}$ is Hydrogen Sulfide and not dihydrogen sulfide? The name of $\ce{N_2O_5}$ is dinitrogen pentoxide, so why is this not the case with $\ce{H_2S}$?
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What's the right way to prep anhydrous potassium ferrocyanide from potassium ferrocyanide trihydrate?
Orgo student here.
I've got some potassium ferrocyanide trihydrate I tried dehydrating with no success.
I put 20 g of potassium ferrocyanide trihydrate into a 30 mL crucible driven up to 150 C for 2 ...
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Why is silicon dioxide acidic in nature and not amphoteric in nature? [closed]
Silicon is a metalloid which means it has
both metallic as well as non-metallic
characteristics. But if silicon is a metalloid
then why is silicon dioxide acidic in nature?
If silicon has both ...
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Why wouldn't a standard addition fluorometric method return the same starting concentration of a solution used to make the standards?
I am trying out a new standard addition method and having some very basic problems. I am hoping someone could point me in the right direction.
I am using a fluorometric method to quantify ammonium in ...
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1answer
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How would I go about developing a linker molecule that binds SiO2?
I'm trying to develop a molecule that acts as a bridge between a protein and surface of SiO2 lattice. The end that binds the protein is simple and easy but I can't figure out a way to draft up how I ...
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What is the relation between strength of a base and the thermal stability of its salts?
In Concise Inorganic Chemistry, $5^{th}$ edition, by JD Lee, while discussing oxides and hydroxides of Group $2$ metals, it has been stated that:
The increase in basic strength is illustrated by the ...
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1answer
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Does ammonia exhibit hydrogen bonding in its gaseous state?
I was reading the properties of ammonia in my book (NCERT Chemistry Part I, Textbook for Class XII)
where it was written :
In the solid and liquid states, it (ammonia) is associated through hydrogen ...
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Doubt in hybridisation of a co-ordinate compound [duplicate]
So, I was doing a question in which I was supposed to answer whether or not [Ni(NH3)2(Cl)2] will show isomerism.
To find, this out, first, I saw that Ni would have +2 oxidation state. Therefore, it's ...
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1answer
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Why is the shape of xenon difluoride linear and not trigonal bi-pyramidal? [closed]
My explanation is, the shape of $\ce{XeF2}$ is actually trigonal bi-pyramidal, but as the 3 lone pairs of $\ce{Xe}$ remain so close to the $\ce{Xe}$ atom itself, it seems that $\ce{XeF2}$ has a linear ...
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1answer
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Why is the oxidation state of Te in H2Te equal to -2?
Hydrogen has electronegativity of 2.2 whereas Telenium has electronegativity equal to 2.1. So since hydrogen is more electronegative than Telenium, as per what I have read, oxidation state of Te ...
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1answer
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How is the molar weight of C-12 equal to 12 gram ? Why is “g” not considered while calculating molar weight? [closed]
So, I was just pretty confused about how we simply multiply the "mass" of total nucleons in Carbon by the Avogadro Constant, to get the molar "weight" as 12 grams, shouldn't it be ...
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Website or Software for Molecular Orbital Rotations
Does anyone know what software or website allows viewers to see rotation of orbitals in a molecule such as conrotatory and disrotatory directions? I'm not an expert in this field sorry. I tried VR ...
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2answers
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Exchange energy of d6 configuration
In NCERT Chemistry book, it is given as:
Exchange energy is responsible for the stabilization of energy state. Exchange energy is approximately proportional to the total number of possible pairs of ...
