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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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why is Cobalt(II) is a reducing agent while Nickel(III) is a oxidizing agent?

The Co(II) ion can be oxidized into Co(III) easily in the presence of strong field ligands around it. But Mn(III) which has the same d electron configuration $(d^7)$ isn't oxidized to Mn(IV). The ...
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1answer
32 views

Reactivity and its meaning

When we say that “potassium” is reactive, are we referring to a potassium atom or bulk potassium as in the solid metal? In other words does “potassium” refer to a type of atom or an agglomeration of ...
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2answers
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Why the bond strength of HCl is more than HBr?

Most people say that it is because the 3p orbital of chlorine when overlapping with the s orbital of hydrogen covers more area than when 4p orbital of bromine overlaps with the s orbital of hydrogen ...
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58 views

What is the magnetic moment of potassium hexacyanochromate(II)?

I calculated the magnetic moment of $\ce{K4[Cr(CN)6]}$? in the following way: $\ce{Cr^{+2}}$ has $4$ d electrons. And since $\ce{CN-}$ is a strong field ligand, the electrons will pair up in the $\...
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1answer
24 views

chemical equilibrium and exothermic reaction

here is an interesting question about the chemical equilibrium and Le Chatelier's principle. the following pressure show the partial that produced in the equilibrium reaction at time (t1 and t2) $$\...
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1answer
33 views

If the net ionic equation and complete equation balance differently, which one do you use? [closed]

Sometimes the full equation of a reaction and the net ionic equation balance out differently. If that is the case, which is the correct one to use? For instance, in the reaction between a solution of ...
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Acidity of polysulfanes

In a chemistry olympiad I had this morning, there was a question on the acidity of polysulfanes. Specifically, it asked candidates to explain the increasing acidity of polysulfanes as the number of ...
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Bond lengths in iodine compounds

Why the bond length of $\ce{I-I}$ bond in $\ce{I3-}$ greater than $\ce{I3+}$ . Is that because the former has more p character than s
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How does mesh size of Barium Chloride affect sulfate results via turbidimetric method?

I am analyzing sulfate using Standard Methods 4500 $\ce{SO4 ^2-}$ E (turbidimetric method) using $\ce{BaCl2}$ and measuring %T at 420 nm. In the past, we used an appropriate 20-30 mesh size for the $\...
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1answer
22 views

What should be the reaction between lead oxide and dilute sulfuric acid?

I know for a fact that dilute $\ce{H2SO4}$ is a non-oxidizing acid which makes it a reducing agent. I also know for a fact that $\ce{PbO2}$ is a strong oxidizing agent. So, I thought Redox reaction ...
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70 views

H-N-H bond angle in ammonia boron trifluoride adduct

In the reaction: $\ce{NH3 + BF3 ->}$ NH3-BF3 does the HNH bond angle increase or decrease? Surely, the FBF bond angle decreases because boron changes from $\ce{sp^2 -> sp^3}$. But how can we ...
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48 views

Why do some covalent compounds form lattice while others do not? [duplicate]

Why do some covalent compounds form lattice while others do not? I'm not only talking about amorphous solids but covalent compounds that form molecular lattice in general. For Example: Compounds like ...
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2answers
60 views

Order Of Reaction [closed]

A+B ———> C+D If A and B are taken in excess then what will be the order of reaction? I thought since it is taken in excess, their change wont really be significant and so answer would be 0.
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Roasting pyrite - product magnetite

When roasting pyrite, the products are usually Fe$_{2}$O$_{3}$ and SO$_{2}$, but is it possible to get magnetite and SO$_{2}$ from roasting pyrite? Thanks for answers.
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1answer
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How can I find the equilibrium constant Kp without temperature?

The question I'm looking at is I found that that Kc = 139M^-1, but how can I determine Kp? There is no temperature given, but I was told that it is still possible to calculate.
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1answer
19 views

The test of metal hydroxides and metal oxides

Is testing metal oxide different from testing metal hydroxide using a litmus paper?
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1answer
22 views

Mole fraction concept

In a certain titration experiment, 1) when $\ce{KIO3}$ solution is added to $\ce{KI}$, the $\ce{I-}$ ion is oxidised to the triiodide complex, $\ce{I3-} $ $\ce{IO3- + 8 I- -> 3 I3- + 3H2O}\tag{1}...
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A question on VSEPR theory

My book explained why the electrons in the $[\text{XeF}_{5}]^{-1}$ are at the axial positions by stating that: It appears contradictory that the two lone pairs are at the axial positions in $[\text{...
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1answer
49 views

Why is CO2 not in the C∞v point group?

It seems to me that CO2, since it can be linearly rotated around the z-axis without change of shape, ought to be in the C∞v point group. However, in all the character tables I can find, it's listed ...
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1answer
33 views

What does FeCl2 mean? [closed]

I'm doing a lab for a class , and in the manual, they right the compound as Fe(Cl)$_2$. I looked up that compound, and it has a very high boiling point, but the compound during the lab was already in ...
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0answers
58 views

Fluoride anion as a strong field ligand

In the case of $\ce{[Fe(H_2O)_6]^{3+}}$ there are $5$ unpaired electrons as water acts as a weak field ligand. But instead of flouride acting as a weak field ion in the $\ce{[MnF_6]^4-}$ , why does it ...
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1answer
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Are 3-center-2 electron bonds and and banana bonds same?

While reading about diborane, I came to know that the two bridging hydrogen atoms in diborane form 3 center 2 electron bonds. On account of repulsion between the two hydrogen nuclei, the delocalised ...
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Analytics of a paramagnetic complexes

I am working with salophene iron[III] complexes. Unfortunately, my 5th ligand cannot be determined via MS. I performed a 1H-NMR in methanol, but it's not a suitable method for a paramagnetic compound. ...
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0answers
39 views

CO2 is attracted to what?

People are using filters to remove $\ce{CO2}$ from the air. What are this filters made of and are there any other substances that attract $\ce{CO2}$? How is $\ce{CO2}$ absorbed or attracted to these ...
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1answer
52 views

H0 value for fluoroantimonic acid

I am confused about $\mathrm{H_0}$ value of fluoroantimonic acid. Wikipedia says $\mathrm{-23<H_0<-21}$. Others say around $-31$. There's a huge gap. I won't worry for $3-4$ fluctuations but ...
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2answers
83 views

Gold/platinum + HF

I know that noble metals such as gold/platinum are unaffected by conc. mineral acids such as HCl or H2SO4 or HNO3 but Can be dissolved in aqua regia (mix of HCl and HNO3 in 3:1), but never heard about ...
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Gallium - Practical use to remove aluminium

Would gallium pass through aluminium into steel? The situation is two joined pieces of metal. Gallium could be applied to the aluminium to degrade it, for mechanical removal, but would it pass ...
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1answer
54 views

I smelled an organic chemical in a lab. (Hexamethylenediamine) Will it cause brain damage? [closed]

Our teacher told us to keep a distance while smelling organic chemicals. I forgot and smelled from the opening of the tiny container. Can this substance be corrosive and may that have neurological ...
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1answer
15 views

Basicity of singlet and triplet carbene [closed]

Which form of n-heterocyclic carbene is more basic and stable? ( Singlet or triplet)
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1answer
31 views

How to assess sunscreen effective via blueprinting?

How do I assess the effectiveness of sunscreen creams by using the blueprinting process? I know blueprinting is done when something is sensitive to light and this may cause reactions to produce a ...
2
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0answers
38 views

Building a Salophen-Complex with Iron(III) and Cyanate

I prepared the compound in (1). Now I want to prepare the complex with a cyanate ligand (2). Is it possible to prepare Fe(OCN)3 or should I form the chloro-complex first and then change the Ligand? ...
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1answer
51 views

Aluminum and aluminum oxide

I have a new grain mill that I am hesitant to use because the rollers are anodized aluminum. As I understand it the anodized aluminum is actually aluminum oxide and supposedly non-toxic. I realize ...
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1answer
102 views

Sn + HNO3: When will the metastannic acid H2SnO3 appear?

I am dissolving tin in nitric acid. What reactions will take place depending on the conentration of $\rm{HNO}_3$ and temperature? Particularly, I am interested when the metastannic acid $\rm{H_2SnO_3}...
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2answers
37 views

What is the reason behind electron transition in the flame test

I am a beginner in this topic but I am aware that when flame test (for alkali and alkaline earth metals) is done there is a s-s transition of electrons from the ground to their excited state. But I ...
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1answer
36 views

Which is stronger ? Picric acid or phoshoric acid

I would like to have clarity as to which acid is the stronger acid; picric acid or phosphoric acid. Because different sources are giving me different answers
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1answer
42 views

What is the entropy of Cu(NO3)2?

I have searched for the entropy of copper nitrate in various tables across the internet* and all I could find was its Hf. Ullmann also didn't give an any better clue. If it was not measured and ...
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1answer
67 views

Lewis acids as ligands

Usually Lewis bases as my textbook says: 2.3 Ligands The ligands are the ions or molecules bound to the central atom/ion in the coordination entity. This is better visualized as the combination ...
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1answer
41 views

Why is ammonia removed before the yield is attained in Haber process? [closed]

Why does removing ammonia from product mixture before reaching the yield of 20% can increase the amount of NH3 produced per unit time?
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1answer
19 views

Help understanding the equation for Spin Energy in Zero Field

I’m working with a system that experiences spin frustration and for me this is the first time dealing with such a phenomenon. To grasp the concept, I’ve decided to go to the basics and read the ...
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1answer
29 views

Etching of ZnS crystal by NaOCl

Can someone tell me the exact mechanism for etching $\ce{ZnS}$ with $\ce{NaOCl}$? I believe it is due to $\ce{OCl-}$ ion, just need confirmation. Many thanks.
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1answer
44 views

Usage of platinum in flame test

Why should we use platinum wire or loop in flame test, can we use any other material ? Why can't we use glass it something?
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2answers
36 views

Materials used in cooktop heating element, and reason for black appearance

I have been interested in the structure of heating elements/coils used in cooktops. I am referring to something such as in the following picture: I have a cooktop at home with such elements, and at ...
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1answer
23 views

Reaction of chloride of 4th A group [duplicate]

Why CCl4 does not react with water,while SiCl4 do react,as both central atom are surrounded by 4 chlorine atom?
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0answers
17 views

Conformations in complex compounds with polydentate chelating ligands?

Does conformational Isomerism also occur in complex compounds where chelation occurs like in organic chemistry and if it happens is the stability order also similar like in Anti Staggered , skew , ...
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1answer
35 views

Stabilization of hydrogen peroxide [closed]

It was given in a chemistry book that things like orthophosporic acid, acetanilide and sodium stannate stabilize hydrogen peroxide, while carbon, $\ce{MnO2}$ and $\ce{Pt}$ help decomposing it. Why is ...
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0answers
226 views

Inorganic IUPAC for Compounds with bridged ligands?

Can we use bis(tetraammine) instead of octaammine is the 2nd example ? As in the 1st example they used bis(pentaammine) and also in the 3 one the used bis(carbonylcyclopentadienyliron)
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1answer
159 views

Stability order of Cr2+ ,Mn2+ , Fe2+ ,Co2+ [closed]

Stability order is given as $\ce{Mn^2+ > Fe^2+ > Cr^2+> Co^2+}$ Of course I know that $\ce{Mn^2+}$ is the most stable form as it has half filled degenerate orbitals. But my query is ...
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Comparing thermal stabilities of MgCl2 and BaCl2

I read that to compare thermal stabilities of ionic solids: if the solid has a monoatomic anion, we compare thermal stability on the basis of lattice energy which is inversely proportional to size. ...
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1answer
66 views

What is a “tri-salt polymer” as described by this product that eliminates and prevents mold?

This answer mentions an anti-mold product called Concrobium Mold Control. The FAQ linked on their website says: Q: I see Sodium Carbonate listed on the label. Is Concrobium Mold Control just Sodium ...
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1answer
63 views

Does hydrogen peroxide in basic medium only give oxygen gas on oxidation?

Does hydrogen peroxide on oxidation gives oxygen gas only in basic medium? I thought that was true but I read about these reaction of $\ce{H2O2}$ in acidic medium: $$\ce{2MnO4- + 6H+ + 5H2O2 -> ...