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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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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58 views

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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60 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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155 views

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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59 views

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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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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159 views

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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186 views

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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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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60 views

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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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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151 views

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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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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987 views

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 ...
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1answer
52 views

Relation between common ion effect and the temperature of the solution [closed]

Adding extra Na+ in a saturated NaCl/water solution decreases the solubility of NaCl. How does this exactly happen? AFAIK, the solubility of a solid only decreases with the temperature of the solution....
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126 views

Effect of d-orbital electron shielding on atomic radius

In a standard book it is given: "Atomic radius of Gallium is less than that of Aluminium. This can be understood from the variation in the inner core of the electronic configuration. The ...
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335 views

Why is a conformer of hydrogen peroxide rotationally inactive?

Hydrogen peroxide may exist in four different forms depending on the dihedral angle, $d = \angle\,\ce{H-O-O-H}$. The four conformers are: Conformer I with $d = 0^\circ$, Conformer II with $d = 60^\...
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96 views

How can we predict the formula of a coordination compound by just knowing the ligand and central metal? [closed]

Question: On complete reaction of $\ce{FeCl3}$ with oxalic acid in aqueous solution containing $\ce{KOH}$, resulted in the formation of product A. The secondary valency of $\ce{Fe}$ in the product A ...
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Why does radium form a nitride rather than oxide when exposed to air?

The Wikipedia article states: Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) on exposure to air, forming a black surface layer of radium nitride ($\ce{Ra3N2}$)....
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Heating effect on Orthoboric Acid

I am a high school student and was studying about the effects of heating orthoboric acid, and I saw two textbooks putting different statements. One book says, On heating above 370K, orthoboric acid ...
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Preparation of an aqueous solution of rubidium azide from rubidium chloride

I want to start with $\ce{RbCl}$ and end up with pure rubidium azide in solution. If I had rubidium sulfate, the following would be possible (from Wiki): $$\ce{Rb2SO4 + Ba(N3)2 -> 2RbN3 + BaSO4}$$ ...
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What are the products when KCl and H2SO4 reacts? [closed]

I have been trying to find the right answer by googling and I just ended up finding multiple answers. Ans #1: $\ce{2KCl + H2SO4 -> K2SO4 + 2HCl}$ Ans #2: $\ce{KCl + H2SO4 -> KHSO4 + HCl}$ Can ...
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78 views

Finding the molecule with the smallest bond angle in the following lists of elements

For each of the following lists of elements, find (and give a justification for your choice) the molecule with the smallest bond angle: a) $\ce{OSF_2, OSCl_2, OSBr_2}$ b) $\ce{SbCl_3, SbBr_3, SbI_3}$ ...
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Construction of the molecular orbital diagram for a species M4

I need to construct the molecular orbital diagram for the hypothetical species ${Li_4}$, which has the following geometrical arrangement: The first step is to identify the point symmetry group. In ...
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132 views

How to calculate Kp without knowing the volume? [closed]

I have the following chemical equation: $$\ce{Sb2S3 + 3H2 <=> 2 Sb + 3H2S}$$ I have $\pu{1000 grams}$ of $\ce{Sb2S3}$ that reacts with $\pu{10 grams}$ of $\ce{H2}$ in a reactor at $\pu{713 K}$. ...
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Passivation of metals in acids

It is commonly taught in chemistry textbooks that metals such as $\ce{Fe, Al, Cr}$ is "passivated" in cold concentrated $\ce{H2SO4}$ and $\ce{HNO3}$ due to them forming oxide films on the ...
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Why d and s orbitals overlap even when there is considerable difference in their energies?

In my grade 11 chemistry NCERT textbook, its written that hybridization happens when orbitals of almost same energy overlaps. But S orbital and D orbital have significant difference in their energies. ...
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131 views

Why does boron form only covalent compounds? [duplicate]

I got two options, The size of $\ce{B^3+}$ ions, is very small and the ion has high charge density. Thus, following Fajan's rule, boron forms covalent compounds. The sum of the first three ionisation ...
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what is the difference between valency and oxidation number? [duplicate]

I know that oxidation number is the charge any species has in its molecular or ion form. And valency is the number of electrons a species contain in its valence shell, that always tends to be used in ...
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Why is the bond angle of sulphur difluoride greater than that of hydrogen sulphide?

Why is the bond angle of $\ce{SF_2 (98.05^\circ) > SH_2 (92.11^\circ)}$? Isn't this contradicting Bent's rule or otherwise electron repulsion rule ? Fluorine is more electronegative and hence it ...
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How to compare the bond angle of ozone and nitrite anion [closed]

How do I compare the bond angle between $\ce{O_3}$ and $\ce{NO_2^-}$ ? I've studied how to compare the bond angle when normal covalent bonds are present where the electrons are shared in the bond and ...
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163 views

How to determine the equivalents of OH- in a titration curve

How does one go about determining the equivalents of $\ce{OH-}$ needed for the titration of a weak acid. For example here is the titration curve for Aspartate: Why is the equivalents for $\mathrm{p}...
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What would happen if the alpha particles directly hit the electrons in the gold foil in Rutherford's experiment? [closed]

What would happen if the alpha particles directly hit the electrons in the gold foil in Rutherford's experiment? Would it get ionized or is there no probability of such a thing happening ?
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Do superoxide salts of heavier alkali metals contradict the principle that lattice energy depends inversely on cation-anion distance?

I have a very basic understanding of quantitative lattice energy calculations: I only know that the lattice energy is directly proportional to the product of charges on the ions and inversely ...
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d orbital irreducible representations in metal in ML4 model [closed]

In ML4 (Metal—4 ligands)model which has a square planar shape and D4h point group, what is the irreducible representation for the 5 kinds of d orbitals in the central metal?
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429 views

Why is the bond angle of trifluoromethane higher than that of difluoromethane?

The bond angle $\ce{\angle(F-C-F)}$ of $\ce{CHF_3 > CH_2F_2}$ whereas that of $\ce{\angle(Cl-C-Cl)}$ is $\ce{CH_2Cl_2 > CHCl_3}$ why is this the case? Some explanations I read suggest the Bent's ...
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Why is it technically inaccurate to say that the decrease in reactivity of halogens is due to decreasing electronegativity?

I came across the following information in this post. Below the infographic there is a paragraph with a disclaimer: As another disclaimer, the reactivity of the halogens decreasing down the group ...
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Why is Electron Gain Enthalpy of only Be and Mg positive, in group 2?

While going through my book, I came across the following observation: $\Delta H_{eg1}$ is positive for Be and Mg Where $\Delta H_{eg1}$ is the first electron gain enthalpy. It seemed quite ...
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Confused about what to put as the x, y in the picture regarding chemical kinetics

I don’t understand what I should put as the x, y...I drew...is it a stechiometric coefficient or an order number? The pictures seem conflicting to me. Am I getting something wrong?
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Which method has the highest yield of calcium sulfate?

I'm not sure which of following two methods will give better yields for $\ce{CaSO4}$: A. Add dilute $\ce{HNO3}$ to $\ce{CaCO3}$, followed by dilute $\ce{H2SO4}$; or B. Titrate aqeuous calcium ...
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56 views

Why are f-f transitions spin forbidden? [closed]

I know that f-f transitions in lanthanides are Laporte and spin forbidden but I don't understand why they are spin forbidden actually... I tried to write it down on a paper but I didn't manage to ...
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389 views

Can ozone oxidise iodine to periodic acid?

I noticed that the reaction of ozone with $\ce{I_2}$ gives iodic acid and not periodic acid. Upon searching, I found this question: Why does iodine get oxidized to iodic acid and not periodic acid by ...
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What is the effect of the oxidation number of iron on the properties of ferroin complex?

In our labratory expermient, we have determined the isobestic point for iron(III) complexation with ortho-phenanthroline, and we have also studied iron(II) complexation with ortho-phenanthroline by ...
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Reaction between sodium carbonate and hydrochloric acid

The 2 steps to the reaction between $\ce{Na2CO3}$ and $\ce{HCl}$ are: $\ce{Na2CO3 + HCl -> NaCl + NaHCO3}$ $\ce{NaHCO3 + HCl -> NaCl + CO2 + H2O}$ If $\ce{Na2CO3}$ is in excess and we add ...
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Why is the trans-effect of nitrile ion (cyanide) weaker than acetonitrile (methyl cyanide) in octahedral chromium complexes?

I was reading a paper which built a series of trans-philicity (a term they coined to indicate both kinetic trans-effect and thermodynamic trans-influence) from extensive calculations. And I found that ...

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