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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188 views

How to determine the strongest oxyacid of chlorine without being given the acid dissociation constant data? [duplicate]

I was told to find the strongest and weakest acids out of $\ce{HCl, HClO, HClO2, HClO3}$, and $\ce{HClO4}$. I knew that $\ce{HClO}$ was the weakest but was stuck between $\ce{HCl}$ and $\ce{HClO4}$ ...
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In crystal field theory, why do all the metal electrons enter the d orbitals and not the s orbital?

Suppose we have the complex $\ce{[Fe(H2O)6]}$. Iron has 26 electrons, and its electronic configuration is therefore $[\ce{Ar}]\,\mathrm{4s^2 3d^6}$, but in crystal-field theory, we say that the $\...
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Dimers and polymers of electron deficient compounds

Why does $\ce{BeH2}$ polymerize into $\ce{(BeH2)_{n}}$ in solid state whereas $\ce{AlCl3}$ dimerises into $\ce{Al2Cl6}$ in the vapour state ?
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What is the formula of manganese oxohydroxide: MnOOH and MnO(OH)2?

I found various formulae of manganese oxohydroxide. Some site says it is $\ce{MnOOH}$, other say it is, $\ce{MnO(OH)2}$. So, which one is correct? The mineral manganite is considered manganese oxide-...
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Why do carbon dioxide and sodium hydroxide not form sodium oxide and carbonic acid?

Why do carbon dioxide and sodium hydroxide not form sodium oxide and carbonic acid? $\ce{CO2 + 2NaOH -> Na2O + H2CO3}$ as opposed to: $\ce{CO2 + 2NaOH -> Na2CO3 + H2O}$ This is in the ...
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NaHCO3 required to raise pH of weak HCl solution from 3.5 to 7.2 (doubting my calculations)

I'm a dentist, working on a medical device that will make shots at the dentist office hurt a lot less. The device mixes a drug (2% Lidocaine) that has been acidified with $\ce{HCl}$ to pH 3.5 for ...
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What are the resonance structures for chlorite anion?

What are the possible resonance structures for $\ce{ClO_2^-}$? Assigning one double bond to the structure makes for formal charges of $\ce{O(-1)-Cl(0)=O(0) <-> O(-1)=Cl(0)-O(-1)}$. It appears ...
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Speculation about chlorine dioxide isomer

I know that chlorine can have a positive charge in the case of oxides. But what I am wondering is if chlorine dioxide can form a ring and if so how likely it is. $\ce{O=Cl=O -> O- -Cl-O- -> (...
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Nomenclature of MnO4^-: is it an oxyanion?

Having a real pain with nomenclature. Look at this substance: $$\ce{MnO4-}$$ So, do we have an anion of manganese and oxygen, or is that just an anion of oxygen? Anyway, my book says that $\ce{MnO4-}...
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Reaction of iron with steam

While studying about reversible reactions, my professor stated that the following reaction is a reversible reaction: $$\ce{Fe + H2O <=> Fe3O4 + H2}$$ She also stated that the product $\ce{...
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Thermal decomposition of magnesium bicarbonate

I was trying to solve a problem from a regional contest where it was a mixture of bicarbonates of $\ce{Na}$ and $\ce{Mg}$ which was put at high temperature. What are the reactions of decomposition? I'...
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How to differentiate the notation of a compounds charge and an anions oxidations state?

I have had the case a few times. Being given something of this form: $$\ce{Cr2O7^2-}$$ How do I know whether the $2-$ is referring to the oxidation of the oxygen anion or the charge of the whole ...
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Beryllium hydride violates the octet rule [duplicate]

Beryllium hydride does not obey the octet rule. Isn't this impossible, unless there are more elements comprising the molecule?
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What makes Gorilla Glass more durable with each generation?

Gorilla Glass (GG) is one of the most recognizable brands of toughened glasses today, thanks to their marketing and widespread usage in various gadgets and automobile industry. According to Wikipedia,...
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“Middle row anomaly” of the periodic table

I was studying about the periodic table recently, and was reading a topic associated with oxides of halogens, and came across the following line The bromine oxides, $\ce{Br2O}$, $\ce{BrO2}$, $\ce{...
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Is it possible create crystalline solvate of electrons?

Okay, I know that this reads ridiculous insane, but one can obtain solvated electrons by adding sodium metal to liquid ammonia solution. The chemical reaction as written in my inorganic chemistry ...
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Jahn-Teller Distortions in Square Planar Complexes?

A Jahn-Teller distortion is predicted whenever a non-linear symmetric molecule has degenerate orbitals and has unequal electron occupation in those degenerate orbitals. Of course, this most often is ...
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Why can't rust form without water?

Shouldn't iron oxide be able to form without water? It is just iron and oxygen. I don't really understand what the dot followed by the $\ce{H2O}$ means either. I was reading on wikipedia, but I have a ...
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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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Oxidation number of phosphorus in phosphine

Electronegativity of $\ce{H}$ is greater than $\ce{P}$, but according to my book in $\ce{PH3}$, $\ce{P}$ has oxidation number of -3. How is it possible? Is any of the data wrong?
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Why does mercury decolourise a gold ring?

I saw that a gold ring decolourised as it got in contact with mercury . Why does this happen ? Is there any way to reverse this?
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Why is the 5d orbital instead of the 4f orbital filled in lanthanum?

For orbitals with the same value of $n + l$ (e.g. the $\mathrm{3d}$ and $\mathrm{4p}$ orbitals), we usually expect the orbital with the lower value of $n$ to be filled earlier. Hence, for example, the ...
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Why do the reactions of Magnesium in steam and cold water differ?

"Magnesium has a very slight reaction with cold water, but burns in steam. A very clean coil of magnesium dropped into cold water eventually gets covered in small bubbles of hydrogen which float it ...
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Diagonal relationships in the Periodic Table

I have often wondered about diagonal relationships between elements on the periodic table, and the most often cited explanations revolve around charge-density considerations. But other than that, ...
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In Crystal Field Theory what does Δo=10Dq mean?

While studying the Crystal Field Theory I was told $\mathrm{Dq}$ is a unit, related to the unit $\Delta_{\mathrm{O}}$ by the relation $\Delta_{\mathrm{O}} = 10\ \mathrm{Dq}$. But aren't $\Delta_{\...
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Purpose of ammine in Tollens' reagent

In this previous question the mechanism for the reaction of Tollens' reagent was outlined. As I understand it the oxidising agent in Tollens' is the diamminesilver(I) complex $\ce{[Ag(NH3)2]+}$ but ...
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Why is acidic hydrogen peroxide a potent oxidizer?

When hydrogen peroxide acts as an oxidizer it itself is reduced. Broadly this means that the peroxide bond is broken and that water is formed. However, why is there a tendency for hydrogen peroxide ...
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What is the chemistry behind black colour of platinum black? [duplicate]

Platinum is a silvery white metal and is highly unreactive then why it's powdered form "platinum black" is platinum metal but is black in colour. why would a metal such as platinum become black as a ...
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Sodium permanganate from manganese dioxide and sodium hypochlorite

This page states that sodium permanganate can be formed by the reaction of manganese dioxide with sodium hypochlorite and sodium hydroxide: $$\ce{2 MnO2 + 3 NaClO + 2 NaOH -> 2 NaMnO4 + 3 NaCl + ...
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Does nitric acid release hydrogen only when reacting with Mg and Mn?

$\ce{HNO3}$ always reduces its anion to give nitrogen containing compounds ( $\ce{NO2}$, $\ce{NO}$, and even $\ce{N2O}$) when reacting with metals, but with $\ce{Mg}$ and $\ce{Mn}$ it releases $\ce{H2}...
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Why Cl⁻ can't act as bidentate ligand?

$\ce{Cl-}$ is a monodentate ligand. It has four lone pairs then why it can't donate two lone pairs to central atom and act as a bidentate ligand?
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Why NH4OH? Why not NH3(aq)?

The title says it all. I had this question when helping someone with their high-school chemistry homework. What are the reasons that someone would use an (from my point of view) obfuscated notation?
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Why can NCl3 be hydrolyzed but CCl4 cannot?

While explaining why $\ce{CCl4}$ cannot be hydrolyzed, we say carbon atom doesn't have any d-orbitals and therefore a water molecule (lone pair electrons of $\ce{O}$ atom) cannot form coordinate bond ...
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What is chemical formula of Bauxite?

My book says Aluminium is extracted from its ore bauxite $\ce{Al2O3.nH2O}$ What does "n" stands for? Does it mean that there is no fixed amount of water in bauxite?
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Bond angle order of SF2, OF2, HOF

Arrange the following componds in the increasing order of bond angle. $$\ce{HOF,~OF2,~SF2}$$ I know that bond angle of $\ce{SF2}$ will be less than the bond angle of $\ce{OF2}$ because of larger ...
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Are bridge bonds in diborane longer than the terminal H bonds?

The compound diborane on alkylation loses the terminal $\ce{H}$-bonds rather than the bridge bonds indicating that the bridge bond is stronger but on the other hand it's length is found to be longer ...
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Difference between backbonding and hyperconjugation and conjugation [closed]

What is the difference between backbonding and hyperconjugation and conjugation? I mean the basic differences as all are concerned with donation of electrons. What is the most striking effect of each ...
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Why doesn't water play a role in reactions in aqueous reactions?

$$\ce{Ba(NO3)2(aq) + Na2CO3(aq)}$$ In the above reaction both the substances are in water, however water plays no role in the reaction. Why is it that although water is present in the reaction, it ...
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Can we classify all the d-block elements as transition metals?

I thought that properties of d-block elements are transitional between those of s-block and p-block elements, and that is the reason for calling them transition metal. My textbook says that not all d ...
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Why does sulfate have this structure?

Look at the structure for sulfate: Why does sulfur form so many covalent bonds. Its valency is only $-2$, it only needs two electrons, yet here it's getting $6$. The same thing happens with ...
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Polarising power

I don't understand this statement written in my textbook about the polarising power of cations. "If two cations have the same size and charge, then the one with pseudo noble gas configuration ( with ...
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Why do thiols have such a propensity for bonding with mercury?

Historically, thiols $\ce{-SH}$ were known as "mercapto-" due to their strong propensity to bond with mercury. Certain drugs still carry this designation, though mercaptopurine has an $\ce{=S}$ group ...
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What is the geometric configuration of the four fluorine atoms during the synthesis of xenon tetrafluoride?

Neil Bartlett (1932–2008) first synthesized $\ce{XeF4}$ (and $\ce{XeF6}$) in 1962. In the synthesis, a nickel chamber is used, and heated to 400°C, causing the formation of $\ce{NiF4}$, which ...
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Does fluorine in FNO3 have +1 oxidation number?

According to my textbook and also Wikipedia, fluorine nitrate is a compound which can be created (though it is unstable). Also my textbook says that fluorine has a $+1$ oxidation state. But how is $+1$...
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Which is more basic, hydrazine or ammonia?

Which of the following will be more basic, hydrazine $\ce{H2N-NH2}$ or ammonia $\ce{NH3}$? My chemistry teacher said that $\ce{NH3}$ is more basic since after giving $\ce{H+}$ to hydrazine results in ...
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Does SiO compound exist?

If carbon monoxide can exist then why can't we have silicon monoxide? Both carbon and silicon belong to group 14 and have similar chemical properties.
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What is the alternative to chromyl chloride test?

Chromyl chloride test is by far the best test to determine the presence of chloride ions in a salt because no analogous compounds are formed with fluorides, bromides, iodides and cyanides, so this ...
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Why is aluminium carbonate unstable?

Can it be isolated at room temperature? Or even at any temperature?
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Treatment of copper (0) with sodium hydroxide

I recently made self-assembled monolayers (SAMs) of alkanethiols on a copper substrate. After scrubbing off the $\ce{Cu2O}$ top layer and rubbing the surface with ether and ethanol, I let my copper ...
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Derivation of the Orgel diagram for octahedral d2 complexes

The Orgel diagram for a typical octahedral $\mathrm{d^2}$ complex is shown below: (source: Kettle, Physical Inorganic Chemistry, p 146) I understand that the right-hand half of the graph shows how ...