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.

646 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
2
votes
0answers
58 views

Understanding formulas for PZT

In the slides i'm studying (about the production of PZT), is given the following formula for lead zirconate titanate : $$\ce{PbZr(Ti)O_3}$$ with the explanation: It is a solid solution of two oxides: ...
2
votes
1answer
32 views

Determination of spinel structure by CFSE

$\ce{CuFe2O4}$ has inverse spinel structure, but $\ce{ZnFe2O4}$ has normal spinel structure. Explain. I know that normal spinels have a structure like $\ce{(A^{II})^{tet}(B^{III})^{oct}_2O_4}$-like ...
2
votes
0answers
28 views

Why isn't the chemistry of a zinc-air battery (meaningfully) hindered by an activation energy barrier?

Virtually every source I've read pertaining to zinc-air batteries explain the chemistry of it either using these formulae or a simplified version of them: $$ \begin{align} &\text{Anode:} &\...
2
votes
0answers
41 views

Order of boiling point of group 14 halides

Find out the species having lowest boiling point: (A) $\ce{SnCl4}$ (B) $\ce{GeCl4}$ (C) $\ce{SiCl4}$ (D) $\ce{CCl4}$ I have considered the inert pair effect of $\ce{Sn}$ here which will make the ...
2
votes
0answers
170 views

Why is boiling point of carbon tetrachloride greater than silicon tetrachloride?

$\ce{CCl4}$ and $\ce{SiCl4}$ both are non polar molecules thus London forces must be the only forces of interaction. Then London forces are supposed to be greater in $\ce{SiCl4}$ due to its larger ...
2
votes
0answers
78 views

Comparing axial and equatorial bond lengths in square pyramidal structures

I found this image on wikipedia: It got me wondering why the axial bond angles were shorter than the equatorial ones. I found this extract elsewhere on the internet - Extract: (ww.nrcresearchpress....
2
votes
0answers
35 views

Which salts precipitate from a potassium/sodium chloride/sulfate solution?

This is not a homework question. I am not in any course of study. The following question arises from my personal curiosity. If 1 mole of sodium sulfate and 2 moles of potassium chloride are dissolved ...
2
votes
1answer
65 views

Is silicon dioxide decomposition possible?

I was thinking about this, I made Gibbs free energy calculations and I can't figure out if $$\ce{SiO2(s) -> Si(s) + O2(g)}$$ is actually possible, even at a ridiculous high temperature.
2
votes
0answers
27 views

Dissolving hydrated vs non-hydrated salts

in chemical catalogs, salts are often sold in hydrated and non-hydrated versions. Like sodium sulfate anhydrous and sodium sulfate decahydrate. I tried dissolving the anhydrous and it didn't ...
2
votes
0answers
34 views

Does it make sense to have a control group for a school chemistry experiment?

I'm wondering if it makes sense to have a control group for the following experiment: measure the speed of gas produced when hydrochloric acid and calcium carbonate react, as a function of surface ...
2
votes
0answers
33 views

Extent of Hydrogen bonding in H2O2

Several books that I have read say that in $\ce{H2O2}$ the degree or extent of H-bonding is 6 as each H atom would form 1 and O atom would form 2 H-bonds respectively. However if we look at HF the no....
2
votes
0answers
56 views

Effect of charge density on electrolysis of dilute sulphuric acid

I am told that if electrolysis of dilute sulfuric acid is performed under high charge density, then the following reaction takes place at anode instead of evolving oxygen: $$\ce{2 HSO4- -> H2S2O8 +...
2
votes
0answers
92 views

Colour of VO3^-?

To aquire the yellow colour of vanadium ion, it must be present in a 5+ oxdiation state. This can be acheived (according to my textbook) by adding dilute sulfuric acid to $\ce{NH4VO3}$, then followed ...
2
votes
0answers
32 views

Competing half reactions in electrolysis of aqueous solution of sodium hydroxide

If you run a direct current using pure nickel electrodes through a solution of NaOH in distilled water, you will separate the water into hydrogen and oxygen. Are there any other reactions that could ...
2
votes
0answers
43 views

Synthesis methods of inorganic materials

On our exams we are asked to determine which synthesis method is best suited for a given compound. We have discussed direct synthesis methods such as high temp. and ampull, and indirect synthesis ...
2
votes
0answers
21 views

Greater ligand stabilization of the lower oxidation state increasing redox potential

According to Atkins, P.W., De Paula, J. and Keeler, J., 2006, Atkins' Physical Chemistry, $$ \begin{align} \ce{[Fe(CN)6]^3- + e- &<=> [Fe(CN)6]^4-} &\quad E^\circ &= \pu{+0.36 V} \...
2
votes
0answers
63 views

Substitute Sr with Mg in MgO

Could someone please help me with the following question. Due to the perspective of voids in the MgO structure, what is the maximal amount of Sr that can substitute with Mg. And why is it unlikely ...
2
votes
0answers
36 views

Can anyone suggest a mechanism for hemiaminal metal complex to imine complex?

Can anyone suggest a probable reason for this conversion? This seems like a simple conversion from hemiaminal to imine. For secondary amine this kind of conversion might be possible by but in the ...
2
votes
0answers
66 views

What is the right color of calcium copper titanate?

I'm browsing Alibaba for calcium copper titanium oxide $\ce{CaCu3Ti4O12}$ (CCTO) and I find it variety of colors: pure brown, pale brown, reddish brown or grayish dark brown. Wikipedia does not tell ...
2
votes
0answers
152 views

Acidic strength order of mineral acids in acetic acid

Explain this acidic strength order $\ce{H2SO4} > \ce{HCl} > \ce{HNO3}$ in acetic acid. My Attempt Stability of conjugate base is proportional to the acidic strength of acids in acetic acid. $\...
2
votes
0answers
198 views

Why my boiling pot turned black?

Recently I ran out of dish washing detergent, so I decided to pick up one of the recipes online, to make my own "ecological" dish washing detergent alternative. The recipe was: Mix ingredients: ...
2
votes
0answers
128 views

Why can't calorimetry be used to measure fast reactions?

As my previous post was a bit unclear and unspecific, I am reformulating it. First of all this is a question that I had while reading some concepts my book introduces, so this isn't a homework ...
2
votes
0answers
331 views

Why are B-O-H and B-O-C angles in B(OH)3 and B(OCH3)3, respectively are higher than normal?

In Concise Inorganic Chemistry by JD Lee (4th edition; adapted by Sudarshan Guha), page 77 under the topic "Back Bonding" it is given: The $\mathrm{2p}\pi$-$\mathrm{2p}\pi$ back bonding in $\ce{B(...
2
votes
0answers
891 views

Why CO is a stronger and more common ligand than N2?

Both N2 and CO are considered sigma-donor and pi-acceptor. Their MO diagram is similar, so I wonder why CO binds generally more strongly and it is a more common ligand.
2
votes
0answers
164 views

Structure and oxidation state of bridging complexes

I am confused about the structure of bridging complexes with the bridging ligands as $\ce{OH-}$ or $\ce{NH2-}.$ Aren't they both monodentate ligands? And if they form a simple coordinate bond, then ...
2
votes
0answers
100 views

Is sodium acrylate soluble in ethanol?

I am trying to make sodium acrylate by neutralizing acrylic acid with sodium hydroxide. I further want to photo-pattern it, which requires the addition of photoinitiator to sodium acrylate. The ...
2
votes
2answers
237 views

Mixing cobalt(III) hydroxide and thallium(III) hydroxide

A simple question on solutions is driving me crazy. At this point, I think the textbook's wrong. Here's the question: A saturated solution of cobalt(III) hydroxide $(K_\mathrm{sp} = \pu{1.6e-44})$ ...
2
votes
0answers
159 views

Amount of benzoic acid required to alter pH of a NaOH-solution

I am trying to do a practice problem but I can't figure it out: How many grams of benzoic acid needs to be added to 0.10 l of a NaOH-solution with a concentration of 1.0 mM to reduce the pH of said ...
2
votes
0answers
38 views

How can we conduct reactions for insoluble materials?

I am working on metal organic polydehra topic to synthesize new metal-organic cages or other based frameworks. I want to conduct postsynthetic modification for one cage, but the solubility is very ...
2
votes
0answers
17 views

Why do electrocatalysts based on polyoxometalates and carbon materials have a weaker activity/performance in acidic media?

I am testing now some doped N and S doped carbon nanomaterials alone and immobilized in POM for the purpose of developing a nanocomposite that can serve as an electrocatalyst for energy-related ...
2
votes
0answers
50 views

Reactivity of Ni Vs. Pd - available oxidation states

I'm hoping someone can help me tighten up my understanding of the origins of the differences between Ni and Pd catalysis. I understand that Ni has higher charge density and this is the reason for it'...
2
votes
0answers
64 views

What does the dissociative mechanism for cis/trans interconversion of [Mo(CO)4(PPh3)2] look like?

All I can find in the literature is that the cis→trans interconversion proceeds via dissociation of one of the PPh3 ligands resulting in a square-pyramidal Cs intermediate, with the remaining PPh3 in ...
2
votes
0answers
111 views

Is there a stable and non-toxic hydro-nitrogen-oxygen compound that's liquid in room temperature?

Is there a stable (i.e. does not turn into other substance when stored in a bottle exposed to the elements or explode/combust spontaneously or under mechanical impact) compound that contains just $\...
2
votes
0answers
869 views

OF2 vs O2F2 oxidising strength

My teacher said that OF2 is the third most powerful oxidising agent after F2 and atomic O, but I think O2F2 should be even more oxidising, since it less stable than OF2. I just read on quora that O2F2 ...
2
votes
0answers
65 views

Can hexavalent chromium be created by exposure of chromium alloys to air at room temperature?

I believe that Cr on its own (as in chrome coating) oxidizes as Cr(III) when exposed to air, and similarly I think that it is the same for Cr as a component of stainless steel. Is it always the case ...
2
votes
0answers
26 views

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 ...
2
votes
0answers
53 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 ...
2
votes
0answers
57 views

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 ...
2
votes
0answers
62 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? ...
2
votes
0answers
856 views

Second ionization energies of copper(Cu) and silver(Ag)

The ionization energies of copper and silver are First ionization energy: Cu-745.5 kJ/mol Ag-731.0 kJ/mol Second ionization energy: Cu-1958 kJ/mol Ag-2073 kJ/mol Now, looking at the ionization ...
2
votes
0answers
290 views

Molecular orbital diagram for terminal metal-oxo complex with dative bonds

I am interested in terminal metal-oxo complexes and their electronic structure, specifically those with coordination numbers of 6, including the oxo ligand. I know that Fe(IV)-oxo complexes tend to ...
2
votes
0answers
49 views

Why are signals broadened in polarography?

In the attached polarogram from Heyvrovsky's 1959 Nobel lecture, transitions from one plateau to the next are smoothened out rather than sharp and abrupt. Why is that? I understand that currents were ...
2
votes
0answers
362 views

Why does physisorption change to chemisorption at high temperatures?

I read in my textbook: In certain cases, physisorption changes to chemisorption as temperature is increased. Could anyone explain why it is so? I know the basics of both physisorption and ...
2
votes
0answers
47 views

How is different flame color of alkali metals related to nuclear charge?

Why do different alkali metals produce different flame colors ? According to my teacher,different atoms have different nuclear charge and due to difference in effective nuclear charge,the orbit to ...
2
votes
0answers
63 views

Why are the terminal Hydrogen bonds in diborane lost during alkylation?

Considering the fact that the bridge h bonds in diborane are weaker according to the answer to the following question..>>.Why are bridge bonds in diborane longer than the terminal H bonds? Why is ...
2
votes
0answers
4k views

The irregular trend in ionization enthalpy of 3d elements

The d block elements display several exceptional behaviours, and one of them is the irregular trend in ionization enthalpy of 3d elements. The reason given by my textbook is very confusing, which I'...
2
votes
0answers
196 views

Alternatives to EDTA for calcium ion chelation

Are there any $\ce{Ca^2+}$ chelating agents (other than EDTA) that are as good as EDTA in terms of binding calcium ions and effective in a pH range of $5$ to $9$?
2
votes
0answers
109 views

What is the significance of effective nuclear charge of an ion

After teaching rules of Slater, our teacher gave some examples. Some of them were to calculate effective nuclear charge on an electron, but some of them involved calculating Z* of atoms and ions. For ...
2
votes
0answers
306 views

Separating gold, platinum and palladium

I've dissolved all 3 metals together in aqua regia due to them being mixed together as $\ce{Pt}$ black, $\ce{Pd}$ black and gold. I isolated the gold with no problem using sodium metabisulfate, but I ...
2
votes
0answers
32 views

Phosphate concentration

I have chemical analyses of groundwater samples (I got the analyses from a previous study) and I want to work with it in my master thesis. In these analyses, phosphate concentration is mentioned in ...

1 2 3
4
5
13