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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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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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 ...
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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 ...
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249 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 ...
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749 views

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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Results of mixing HSbF6 and O2F2

I'm an amateur writer and one of the topics I deal with is what happens when a slightly-mad scientist and engineer is given an opportunity to work with full-on “magic.” So there are situations where ...
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57 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 ...
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119 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 $9$?
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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 ...
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195 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 ...
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31 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 ...
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128 views

How can copper(II) nitrate hexahydrate be synthesized in the laboratory as well as industrially?

I am researching the hexahydrate and found the same synthesis method being presented for both the anhydrous form and the trihydrate form. Chemistry of the Elements Second Edition, N. N. Greenwood ...
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43 views

Continuous series of inorganic hydrates (from mono- to deca-)

I'm doing some research for university and it has to do with crystals. I'm currently experimenting with $\ce{CuSO4 * 5 H2O}$. I know we refer to the formula as copper sulfate pentahydrate. And also, I'...
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133 views

Comparision of the Ionisation Energy Change of the alkali metals and noble gases?

Currently I compare the ionisation energys of the alkali metals: Li: $\pu{0.52 eV}$ Na: $\pu{0.50 eV}$ K: $\pu{0.42 eV}$ Where only a slight drop (appr. remain constant) occurs. This ionisation ...
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48 views

Separation of argon in Dewar's charcoal method

I was studying about the Dewar's charcoal method. It says in the book Modern Inorganic Chemistry by R. D. Madan on p. 1291 that at $\pu{-100 ^\circ C}$ Ar, Xe and Kr is adsorbed by the charcoal. ...
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2k views

Unpaired electrons from magnetic moment

A complex formulated as $\ce{Cs_x[NbCl6]}$ has spin-only magnetic moment $\mu_{s.o}$ of approximately 2 B.M. From this value calculate how many unpaired electrons are present. Spin-only magnetic ...
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867 views

Balanced Chemical Equations of the preparation of sodium peroxoborate

I know the chemical equation for the reaction of borax with sodium hydroxide and hydrogen peroxide $$\ce{Na_2[B_4O_5(OH)_4]\cdot6H_2O + 2NaOH + 4H_2O_2 ->2Na_2[B_2(O_2)_2(OH)_4]\cdot6H_2O + 3H_2O}...
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28 views

Correlation between electron counting and structure for metal borides

When it comes to metal borides, the electron counting and its correspondence to structure seems weird. For instance, $\ce{MgB2}$ and $\ce{AlB2}$ are isostructural, which is surprising. Further ...
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31 views

Hybrid thin films containing azobenzene with reversible photoresponsive behavior

I am going to prepare hybrid thin films containing azobenzene with reversible photoresponsive behavior. I have read about different combinations of inorganic layers such as layered double hydroxide (...
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210 views

Does soda-lime glass contain carbon?

Soda-lime glass is made by melting together soda (sodium carbonate), lime (calcium oxide), dolomite (calcium magnesium carbonate), silica (silicon dioxide), alumina (aluminum oxide), and small ...
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241 views

Acidified sodium sulfite in the reduction of iron(III) to iron(II)

Why does sodium sulfite have to be acidified in the reduction of $\ce{Fe^{3+}}$ to $\ce{Fe^{2+}}$? Does the acid act simply as a catalyst or is it necessary for the reduction process?
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245 views

Polarisation of a cation by an anion

Shriver and Atkins' Inorganic Chemistry (5th edition) explains amphotericity of the oxides of the heavier elements in Groups III, IV and V by high covalent character of the bonds made by the elements. ...
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138 views

Narrow range of pH for the formation of polyoxometalate clusters

The molybdate ion in aqueous solutions, speciates as clusters known as polyoxometalates (POMs) when it is acidified, but these clusters only aggregate in a very narrow pH range "polymeric range" in ...
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346 views

What is the effect of the surface area of an electrode on the emf of a cell?

I've read that a platinum electrode has no effect in a hydrogen fuel cell - why is this? Also, what is the effect of the surface area of an electrode such as zinc in a zinc copper cell?
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Why is it difficult to measure the pH of environmental water samples accurately (near 7)?

I've read in several places (edit: 1, 2, 3, 4, 5, 6, 7, 8. 9, 10, 11, 12) that there are many practical factors that make accurate pH measurements of roughly neutral environmental water samples more ...
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223 views

Are lustre and conductivity directly related?

In a question that I had asked before, Is chromium the shiniest metal?, I received the answer that silver was, in fact the most lustrous metal for visible wavelengths. At the same time, silver is also ...
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353 views

Copper (II) oxide during CuSO4 electrolysis

I was performing copper (II) sulfate electrolysis (graphite electrodes; 10V; 0,01A) today and I observed black precipitate falling from around cathode. I suppose it's copper(II) oxide. I couldn't find ...
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70 views

Chemically generating a high vacuum?

Suppose I fill a vacuum chamber with 99% oxygen, then pull a vacuum on it down to 10 pascal absolute. If I then vaporize aluminum (for vapor deposition), will the aluminum bind with the remaining ...
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204 views

Would an aqueous solution of Zn(2+) develop a positive charge if solid zinc was dipped into it?

Say you have a beaker containing $\pu{1M}$ solution of $\ce{ZnSO4}$. The solution will be electrically neutral because there will be an equal number of cations and anions. If you then put a zinc ...
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Synthesis of a tungsten carbene bromide from [CpW(CO)3]-

I'm currently working through past test and exam papers in order to prepare for my organometallic test at the end of the month, but unfortunately I've gotten stuck on the following question. Since I ...
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568 views

How does increasing ionic strength affect the pH of solution?

I'm having trouble interpreting the data for an experiment. With increasing ionic strength, I found lower solubility but also lower pH of the solution. What is the effect of the ionic strength on the ...
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92 views

Boiling Point trend

Why does group 13 and 14 show reverse the trend of boiling point? In other groups, boiling point increases down the group but here it decreases.
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259 views

Covalency in bonding across the periodic table

Bonding between main group elements is obviously almost entirely covalent and it is often easy to see these covalent bonds as 2c-2e bonds localised between two atoms. The bonding in borane, boron ...
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Nomenclature of This State?

I've read this in a book It says the state having three parallel spin is called triplet state . But as far as I know it is determined by "2S+1", from this it comes out to be 4 . Then how it is "...
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35 views

Purple rinse water

After forming a white substance while on the stove, I rinsed the Pyrex pot under tap water (from a well), whereupon the water in the pot turned purple. Why did this happen? Iron and sulfur are ...
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813 views

Job's Plot or Method Of Continuous Variations

I was wondering why in order to find the stoichiometry of a complex using Job's Plot, the two compounds must have the exact same molarity. What kind of effect would it have if molarities weren't the ...
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198 views

Why does ammonia causes unsymmetric cleavage of diborane, but carbon monoxide causes symmetric cleavage?

Diborane reacts with Lewis bases to form adducts. I did some research on my own, and found that ammonia breaks it unsymmetrically but $\ce{CO}$ and $\ce{PF3}$ break it symmetrically. I cannot find ...
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84 views

How does dissolving LDPE in wax work?

I was looking into machinable wax, and found it's based on dissolving LDPE into melted wax. While I understand the normal salt dissolving in water process, I'm not really sure how plastics can ...
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1k views

Hard and Soft Acid and Bases in terms of HOMO and LUMO

It has been given in a book and on Wikipedia that: hard bases have highest-occupied molecular orbitals (HOMO) of low energy, and hard acids have lowest-unoccupied molecular orbitals (LUMO) of high ...
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Electrolysis of molten sodium iodide

Electrodes: Zinc electrodes Electrolyte: molten sodium iodide I know that at the cathode, sodium metal will be formed because only sodium ions are present for reduction. At the anode, originally ...
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19F MAS NMR chemical shift tensor and the crystal structure

$\ce{^{19}F}$ MAS NMR is measured on fluorine-doped $\ce{TiO2}$. $\ce{F}$ is to substitute $\ce{O}$ and the crystal structure is anatase, which has a tetragonal crystal system with a space group $\ce{...
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Do all covalent nitrates on heating decompose to give NO2?

Being covalent we can conclude that they will on heating decompose completely, but will they give only NO2 and not any other oxide is the question. It is observed in PbNO3, AgNO3 and also LiNO3(the ...
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Looking for solubility kinetics of zinc chloride hydroxide monohydrate

$\ce{Zn5(OH)8Cl2.H2O}$ is a crystalline solid insoluble in water. Often used as nutritional supplement. Preparation and chemistry of zinc chloride hydroxide monohydrate is known. I am looking for some ...
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677 views

Why are gold-sulfur bonds so stable?

In my analytical chemistry book, I have seen that molecules' electrical conductance has been measured by putting sulfur-containing groups on them and using atomic force microscopy with a gold surface. ...
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87 views

Why can Bi not achieve its 4+ oxidation state?

Bi can reach its 3+ and 5+ oxidation state. Why not 4+? Can you use the inert pair effect here to explain this?
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700 views

Why is there no Pi-backbonding in BeCl2?

The $\ce{Cl}$ atoms in $\ce{BeCl2}$ donate a lone pair to the $\ce{Be}$ atom of another molecule so that Beryllium can complete its octet. What I don't understand is why don't the $\ce{Cl}$ atoms ...
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Why do reactions of sodium halides with sulfuric acid produce sodium hydrogen sulfate instead of sodium sulfate?

In the reaction of sodium halides with sulfuric acid, sodium hydrogen sulfate is produced \eqref{NaHSO4}. Why would this be produced instead of sodium sulfate \eqref{Na2SO4}? \begin{align} \ce{NaX + ...
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253 views

S-N bond IR vibrations

I am working on organosulfur compounds where i have S-N bonding, according to literature it might be having an ir vibration of 1100cm-1, could anyone confirm it with reference. (the complete bonding ...
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244 views

Lead(II) oxide CRT monitor extraction

I have a large CRT monitor that, by the weight of the monitor, I estimate to contain over two pounds of lead. I want to know if the lead oxide is a mixture with the glass, or if it is chemically ...
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700 views

Does mercury (I) chloride react with HCl?

If solid $\ce{Hg2Cl2}$ is placed in concentrated $\ce{HCl}$, will it react? If so are the products $\ce{Hg2^2+}$, $\ce{H2}$, and $\ce{Cl2}$ ? $$\ce{Hg2Cl2(s) + 2HCl(aq) -> Hg2^2+ + 2Cl2(g) + H2(...