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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303 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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Irregular trend in the first ionisation enthalpy of 3d elements

I was studying my textbook and I stumbled upon this part. The irregular trend in the first lonisation enthalpy of the 3d metals, though of little chemical significance, can be accounted for by ...
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Is Copernicium a transition metal?

Zinc, cadmium, mercury and copernicium belong to the group 12 of the periodic table. In my textbook , it is mentioned that zinc, cadmium and mercury are d-block elements, but not transition metals. ...
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Distortion of electron cloud of anion when going down Group 2. (Thermal stability) [closed]

My teacher said that the if more heat is given, it is easier to distort the electron cloud of anion. Is this correct?
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How can I make cerium(IV) chloride? [closed]

How can I make CeCl4? 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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Total entropy change for a spontaneous reaction

For the oxidation of iron, $$\ce{4 Fe(s) + 3 H2O(g) -> 2 Fe2O3(s) + 3 H2(g)}$$ the entropy change is $ \pu{–549.4 J K^{-1} mol^{-1}}$ at $\pu{298 K}.$ In spite of the negative entropy change of ...
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Reaction of a non-metal with alkali to produce hydrogen gas [closed]

I want to ask that is there any non-metal which reacts with an alkali (NOT alkali metal) to produce hydrogen gas?
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Reaction of white phosphorus with aqueous sodium hydroxide

What are the products obtained in the reaction of white phosphorus with aqueous sodium hydroxide? I know one will be phosphine ($\ce{PH3}$). How can we find the oxidation state of phosphorus in the ...
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44 views

What is the basicity order of peroxide, superoxide and hydroxide anions?

My teacher told me superoxide and peroxide anion are more basic than hydroxide but according to Wikipedia Given that the hydroperoxyl radical has a pKa of around 4.8 and and pKa of H2O is Acidity (...
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Regarding the reaction of xenon with fluorine gas

In my textbook, under the topic about xenon-fluorine compounds, the following three equations are mentioned: $\ce{Xe(g) + F_2(g) -> XeF2(s)}$ (Xenon in excess / 2:1 ratio) $\ce{Xe(g) + 2F_2(g) -&...
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Why are bicarbonates of alkaline earth metals stable only in aqueous solution?

Numerous internet sources (1, 2, 3, etc.) state this fact, including a Wiley publication "Alkaline Earth Metals: Inorganic Chemistry - William S. Rees Jr" (DOI: 10.1002/0470862106.ia005) on page 9: ...
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Does (BeCl2)n have 3c - 4e- bonding or not?

The title really explains what the issue is here. I would think that it has multicenter bonding akin to $(\ce{BeH2})_n$ polymer because they are pretty much iso-structural (although it shouldn't have $...
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1answer
245 views

The order of increasing covalent nature in group 12 (Zn, Cd and Hg)

Suppose $\ce{Zn}$, $\ce{Cd}$ and $\ce{Hg}$ were to form a bond with the same element; say $\ce{ZnCl2}$, $\ce{CdCl2}$ and $\ce{HgCl2}$ Then which of the compounds would be showing most covalent ...
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Why indium and thallium doesn't react with alkali solution? [closed]

It is given in my book that ' In Boron family, only Aluminum and Gallium reacts with alkali solution and not Indium and Thallium' What makes indium and thallium unreactive to alkali solution?
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What do the prefixes meta, ortho, pyro mean in inorganic chemistry?

In inorganic chemistry, when is the prefix meta used? (as in metaborate and metasulphite) What about the terms pyro and ortho (as in orthophosphorous acid)? For example, I recently came to know about ...
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Order of Shielding Effect for orbitals

From what I know Shielding effect is the ability of inner electrons to repel outer electrons and reduce the Nuclear charge felt by the outer electrons and this is caused by electron-electron repulsion....
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Fields of Study in Chemistry [closed]

Is there a standard classification scheme for different areas of study and research for chemistry like mathematics has Mathematics Classification Scheme (MSC)?
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Are Slater’s rule and lanthanide contraction contradictory?

According to most textbook and the Wikipedia page of lanthanide contraction, the phenomenon is due to poor shielding of nuclear charge by 4f electrons. However, the σ value of 4f electrons to 6s is 1....
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Applying the Pauling's electronegativity when the ionisation enthalpy and electron gain enthalpy of an element are given

I came across the following problem while practicing some exercises on inorganic chemistry: If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 $Kcal mol^{-1}$ ...
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Why doesn't iron(III) iodide exist?

$$\ce{Fe2O3 + 6HI -> 2FeI2 + I2 + 3H2O}$$ Why don't we get $\ce{FeI3}$? After all, iron's oxidation state is $+3$ in the reagent. Should one just memorize that up to bromine, it's $\ce{FeX3}$, ...
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Is there any concept of polymerization in Ferric (Fe)? [closed]

Recently I have read a ferric compound i.e polymeric ferric sulfate(PFS)sometimes called poly ferric sulfate, there is not much data on it structure such as XRD, XPS, SEM etc, is that mean there is ...
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1answer
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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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2answers
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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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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 USD for 1gm germany made and only 30 USD for Indonasian ...
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What is the strongest oxidising agent?

I searched for the strongest oxidising agent and I found different results: $\ce{ClF3}$, $\ce{HArF}$, $\ce{F2}$ were among them. Many said $\ce{ClF3}$ is the most powerful as it oxidises everything, ...
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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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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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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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Salt analysis of Ag salts

So I was doing analysis of silver salts and I found $\ce{AgBr}$ is curry white partially soluble in ammonia, $\ce{AgI}$ is yellowish and insoluble but silver phosphate is also yellow. So can anyone ...
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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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879 views

Does the reaction of sulfur and potassium nitrate involve production of sulfur trioxide? [duplicate]

I've heard that oxidising sulfur with potassium nitrate yields $\ce{SO3}$ gas, but can't find a definitive answer anywhere. Is sulfur trioxide produced? More generally, what's the full reaction?
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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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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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1answer
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Explanation of rusting of iron through metallic bonding [closed]

In the diagram , colour representations : [O - oxygen atoms , red dots - electron ] I will explain rusting of iron due to metallic bonding as I have understood from online. Please correct me if I’m ...
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174 views

Disposal of Silver Halides dissolved in Ammonium Hydroxide

I was reading the Lab Manual for Chemistry prepared by the NCERT . While going through the the test for Chloride ions (pg 88) I came across the following Hazard Warning : The solution obtained after ...
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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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What is Drago's rule? Does it really exist?

My textbooks states the Drago's rule in inorganic chemistry as follows: The more electronegative atom prefers the orbital having more $\mathrm{p}$ character, and lone-pairs or less electronegative ...
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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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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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1answer
89 views

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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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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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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48 views

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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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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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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1answer
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Why boron trihydride is weaker lewis acid than boron tribromide and boron tri-iodide?

There is no back-bonding in case of boron trihydride so it is a stronger lewis acid than boron trichloride ( even though chlorine atom is more electronegative than hydrogen atom). Then why boron ...

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