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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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Thermal instability of sulfur and selenium iodides

After recent question about non-existent pnictide(V) iodides, I stumbled upon a similar issue in oxygen group. For example, $\ce{SI2}$ was reported to be found… but at the temperature as low as $\pu{9 ...
Mithoron's user avatar
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How Can the First Ionization Energy of Helium be Accurately Calculated Using Basic Quantum Mechanics?

How Can the First Ionization Energy of Helium be Accurately Calculated Using Basic Quantum Mechanics? There is a book which summarizes the fairly accurate calculation of the First Ionization Energy of ...
Stephen Elliott's user avatar
-5 votes
1 answer
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Can H2CO3 and NaHCO3 be in the same solution at the same time?

In my opinion they can't. Because the product of reaction will have $\ce{H2CO3}$, and end up with $\ce{H2O}$ and $\ce{CO2(g)}$. And gas can not be part of a solution. $$\ce{H2CO3 +2NaHCO3 -> Na2CO3 ...
Usama Khedr's user avatar
4 votes
2 answers
455 views

Why does color of substances not disappear after some time?

Some compounds are colored due to HOMO-LUMO transition. We see the complimentary color to the frequency which the electron absorbs to get the high molecular orbital. But after some the electron should ...
Garv Chaudha's user avatar
1 vote
0 answers
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To check if something is prefixed as a Pyro

How to figure out if something's a Pyro by looking at its formula? The thing I know about Pyro compounds is that Ortho acid + Ortho acid - $\ce{H2O ->}$ Pyro compound I have no issues if I end up ...
Cuckoo Beats's user avatar
-2 votes
2 answers
241 views

How to neutralize 60L of a 2% Aqua Regia with Various Metals suspended

I am encountering an issue in my laboratory. My supervisor and I are currently faced with the task of neutralizing a volume of 60 liters of Aqua Regia, which contains suspended metals, at a ...
Matt's user avatar
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0 answers
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Please explain the order of Lewis acidic strength in trichlorides of boron group

The order of decreasing Lewis acid character as per online sources is as follows: BCl3 > AlCl3 > GaCl3 > InCl3 Reason cited is: As we move down the group, the size of atom increases, and as a ...
Henri IV's user avatar
13 votes
3 answers
2k views

Why Is Hydrogen in HSO3- Connected to Oxygen Instead of Sulfur?

One of the questions in my homework was to draw $\ce{HSO3-}$, which I thought to be pretty easy. Sulfur is the least electronegative (except hydrogen but it can't be the central atom), hence it is the ...
Lyborick's user avatar
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2 answers
114 views

Why is Li easiest to oxidise among the alkali metals despite having the greatest ionization energy 1 in the group? [closed]

If we use the magnitude of the IE1 as an indicator of ease of oxidation, Li is the most difficult of the alkali metals to oxidise. On the other hand, if E0redn (standard reduction electrode potential) ...
Henri IV's user avatar
1 vote
1 answer
102 views

What are the dissociation constants of hydronium and hydroxide ions? [duplicate]

Context The answer to How to calculate Ka for hydronium and Kb for hydroxide?, water was regarded as solvent once and base (or equivalently acid) once while citing Reference 1 (1986) and made no ...
ananta's user avatar
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Do transition metals only carry d-electrons as valence electrons until group 11?

as I was revisiting my lecture notes in inorganic chemistry, I noticed that we treated the transition metals as elements where the energetic order of 4s ad 3d orbitals is reversed. For example ...
Mäßige's user avatar
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2 votes
1 answer
247 views

Uncertainty for repeated measurements

I am having some trouble calculating the percent uncertainty of obtained cell potential. My cell potentials were 1.788, 1.787, and 1.792 volts with the uncertainty of voltmeter $\pm$ 0.001 volts. Here ...
qmoi's user avatar
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-2 votes
1 answer
199 views

Can I put both Epsom Salts and Lectric soda into a bath [closed]

I would like to get the benefits of absorbing Magnesium by using either Epsom salts (magnesium sulphate) or magnesium chloride and the benefit that lectric soda (sodium carbonate) has on sore, tired ...
Amanda's user avatar
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7 votes
1 answer
304 views

Why is fluoroantimonic acid so unique?

Fluoroantimonic acid is the strongest acid because its conjugate base $\ce{SbF6-}$ is exceptionally stable. $\ce{SbF6-}$ is in perfect octahedral symmetry wherein the negative charge is equally shared ...
哲煜黄's user avatar
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2 answers
103 views

Mechanism of S2Cl2 and NaHSO3 [closed]

I learned that NaHSO3 reacts with S2Cl2 to give Na2S4O6 as product. After looking up the structure of Na2S4O6, it confuses me that four sulfur atoms connect together. I couldn't figure out the exact ...
Shira's user avatar
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0 answers
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How does the canonization method of RDKit operate when valence is exceeded?

RDKit's canonization method1 allows nitrogen to bond with 3 hydrogen atoms and one oxygen atom ...
nightcod3r's user avatar
1 vote
1 answer
84 views

Why can sulfate be oxidized to peroxodisulfate?

I am currently in high school and have encountered the following reaction in my course on electrochemistry: $$\ce{2 SO4- -> S2O8^2- + 2 e-}$$ Why this reaction happens in the first place? Isn’t the ...
TheCuriousOne's user avatar
3 votes
2 answers
140 views

Crystal structure of tin tetraiodide

I was looking at the molecule of $\ce{SnI4}$ and how its structure looks like in its crystal lattice: Wikipedia.de says its crystal lattice is of the fcc (ccp) type (for the iodine atoms), which ...
Mäßige's user avatar
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1 vote
1 answer
92 views

Does I2 form coordinate covalent bond with PI3 in PI3.I2 (PI5)

As PI5 is uncertainly stated as the combination of PI3 and I2. There are suggestions that phosphorus donates its 3s electron pair to molecular orbital of I2 or I2 donates its electron to 3d orbital of ...
Shira's user avatar
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6 votes
1 answer
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Why does phosphinic acid not form pyroacids?

Why does $\ce{H3PO2}$ not form pyroacids? All I know is pyroacids are derived oxyacids obtained by removing one $\ce{H2O}$ molecule from two molecules of oxyacids. Correct me if this is wrong.
Mathlover12345's user avatar
5 votes
1 answer
1k views

Could someone explain the ouzo/sambuca effect?

I know that ethanol is mixed with some ingredients as fennel which give to this its particular taste. Fennel and ethanol are mixed together. Ethanol is also mixed with water. The analogy is 60 percent ...
Larsa se eidaklaxtarsa's user avatar
0 votes
1 answer
79 views

Do complexes of a metal distribute in between the water and an organic compound layer?

My original question is one that is stated in the title, and I also have some side questions too. I came across this question where you have a CuSO4 aqueous solution. Then you take an Ammonia aqueous ...
donthababakka's user avatar
0 votes
1 answer
100 views

Ductless fume hood for dissolving aluminum foil in hydrochloric acid

I work at a food manufacturing plant and we use Tetra Pak packaging for our liquid foods. There is a layer of aluminum foil within the packaging material that we need to dissolve out of the package in ...
Andrew's user avatar
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-3 votes
2 answers
109 views

Powder left everywhere after solution was left to evaporate. What could it be?

I dissolved a coin made of silver and copper and probably other metals in nitric acid. I neutralized the solution with some sodium hydroxide and then added salt(NaCl) to make Silver Chloride. A white ...
randomuser38924's user avatar
-3 votes
1 answer
262 views

Does BCl4- exist? [closed]

Is [BCl4-] a good Lewis acid as I according to Jerry March's Advanced Organic Chemistry ,the reactivity order of Lewis acids in Friedel Craft reactions , BCl3 is mentioned which means that BCl4- is a ...
Arjun Aggarwal's user avatar
1 vote
2 answers
333 views

When HI reacts with H2SO4, why is the sulphate ion reduced to hydrogen sulphide instead of sulfur dioxide?

When $\ce{HI}$ reacts with $\ce{H2SO4}$, it can be represented by the following chemical equation: $$\ce{8HI + H2SO4 -> 4I2 + H2S + 4H2O}$$ However, when $\ce{HBr}$ reacts with $\ce{H2SO4}$, the ...
Jelly Qwerty's user avatar
4 votes
2 answers
497 views

What determines how easily a gas can diffuse into a crystal structure?

I have been told by a metallurgist that the reason a factory oxidizes the iron oxides in ilmenite before reducing them down to pure iron, is that the the products of this have a more spacious crystal ...
user110391's user avatar
0 votes
1 answer
67 views

HPLC Solubility vs polarity

According to this data collected from PubChem, polarity of nitrobenzene and benzonitrile should be similar since solubility is dependent on the polarity: Nitrobenzene: Solubility in water, 0.2 g/100ml ...
O.Ceren's user avatar
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1 vote
0 answers
131 views

Why are Sonogashira reactions moisture sensitive?

Exemple, aryl halide + TMS-acetylene in NEt3 + Pd[PPh3]2Cl2 or Pd[PPh3]4: The reaction does not form water at any time so its presence wouldn't shift the equilibrium. Neither TMS-acetylene or the aryl ...
The Red Man Jolan Bonelli's user avatar
2 votes
2 answers
584 views

Reading Graduated Cylinders for a non-transparent liquid

A graduated cylinder is meant to be read with the surface of the liquid at eye level, where the center of the meniscus shows the measurement line. Is it also true for any non-transparent or a colored ...
Matematikos Pamokos's user avatar
3 votes
0 answers
77 views

Ethylene Glycol in Wall Primer [closed]

No scientific background here! Due to a chemical sensitivity, and general concern for healthier indoor air quality in a home I am renovating, I opted to choose "greener" alternatives in ...
Violetta Sur's user avatar
1 vote
0 answers
46 views

Why is the distinction from "coordinative bond" useful at all? [closed]

There are 3 types of coordinative bonding, complex formation at the electron donor, complex formation at the electron donor acceptor and complex formation at the electron acceptor, so what is the ...
iwab's user avatar
  • 359
-4 votes
1 answer
185 views

how I can separate nickel and chrome in single [closed]

How I can separate chrome and nickel from a nickel sulphate,nickel chloride and chrome salt separately??when these mixed up in a single solution.Please tell me how to do it using simple house hold ...
Naveed AA's user avatar
2 votes
1 answer
108 views

What's the formal definition of a ceramic in chemistry?

Dictionary.com defines a ceramic as: noun (used with a singular verb) the art or technology of making objects of clay and similar materials treated by firing. (used with a plural verb) articles of ...
user148298's user avatar
-2 votes
4 answers
105 views

Specifying which compound is oxidized/reduced in a redox reaction [closed]

I wrote the oxidation numbers in a redox reaction: $\rm{2 \overset{+7}{Mn} \overset{-2}{O_4^{-}}~+~5\overset{+4}{S} \overset{-2}{O_2}~+~6\overset{+1}{H}_2 \overset{-2}{O}~~\rightarrow~~ 5\overset{+6}{...
Nikhil Kumar's user avatar
0 votes
1 answer
2k views

How many lone pairs does NO have?

In an exam, I have been asked about the number of lone pairs in the molecule NO, the answer has been given as 2. According to Wikipedia, there is a structure relating a three electron bond as a third ...
Seeker's user avatar
  • 1
-1 votes
2 answers
122 views

The reaction of HNO3 with H2S? [closed]

I am totally confused about the gas that would be released in this reaction. It is given NO in one book and NO2 in other. Even the internet has mixed opinions. Help me out guys.
Vivek Kumar's user avatar
-4 votes
1 answer
71 views

Energy levels for H atom [closed]

Problem Statement: The number of orbitals (for H-atom) which have greater energy than $3p_y$ orbitals: $3s, 3p_z,3d_{z^{2}},3d_{x^{2}-y^{2}},2p_y, 4d_{z^2}, 4p_{y}$ The solution says that energies ...
PurposeHonest's user avatar
5 votes
4 answers
219 views

Deriving reduction potential from redox reactions

From a past USNCO test: 40. What is the standard reduction potential of $\ce{Hg^2+(aq)}$ to $\ce{Hg(l)}$? \begin{align} \ce{2 Hg^2+(aq) + 2 e- &-> Hg2^2+(aq)} &\quad E^\circ &= \pu{+0....
Mingjia Zhang's user avatar
2 votes
0 answers
161 views

Size of Lanthanum

I was going through the values of atomic and covalent radii of the d-block elements. The atomic radii of $\ce {Sc},\ce {Y}$ and $\ce {La}$ are $164, 184$ and $187$ pm respectively (Source: Wikipedia). ...
algorhythm's user avatar
0 votes
0 answers
315 views

What is the actual complex formed in Fehling's solution?

What is the actual complex formed in Fehling's solution when Fehling’s solution A and Fehling’s solution B are mixed in equal amount? Wikipedia suggests: $\ce{[Cu(C4H4O6)2]^2-}$ But the book I follow ...
CHEMUMAN's user avatar
-4 votes
1 answer
70 views

Are zinc & copper extracted from its ore using cyanide salt?

In my textbook, the extraction of Zinc is done from $\ce{ZnS}$ and copper from Cuprous oxide, so neither of extracting procedures involve the use of $\ce{CN^-}$ salts. Thinking further, both Zn(II) ...
I.Bedi's user avatar
  • 101
-4 votes
1 answer
82 views

Why do my slow burning fuses light off? [closed]

So recently II have been making a few times some slow burning fuses with: 34 g potassium nitrate, 26 g sugar, 60 g of water and some wool yarn. However when I light it up it burn a few seconds and ...
goAT2160's user avatar
1 vote
0 answers
119 views

Are there TLC stains for organo fluor compounds or anorg. fluoride that are useful for selecting the product containing fractions post purification

Are there TLC stains that work with fluoride or with organofluor compounds? I have a fluorinated phosphonic acid that does not stain with conventional means. I did research in many of the known and ...
raptorlane's user avatar
-4 votes
1 answer
309 views

If NaOH is a Brönsted-Lowry base then, what is its conjugate acid? [closed]

Brönsted-Lowry theory doesn't go against but adds to the Arrhenius theory on bases and acids. $\ce{NaOH}$ is an Arrhenius base because it releases hydroxide ions in water solution. NaOH is also a ...
A user132802's user avatar
0 votes
0 answers
62 views

Elegant and fast way without chromatography to remove fluoride ions from water phase without contamination of the polar water soluble product?

I have a challenging purification routine. I want to remove fluoride from an aqueous solution, my product is a phosphonic acid, which is readly water soluble and an anion. The anion is about 200 Da in ...
raptorlane's user avatar
-2 votes
2 answers
252 views

Polarity and solubility

I have a doubt about solubility: a molecule is polar when it has a dipole moment that is ≠ 0. Very often it is said that like dissolves like, that is, that polar substances dissolve in polar solvents, ...
Luckenberg's user avatar
-4 votes
1 answer
116 views

Decomposition of Al2S3 in water [closed]

Al2S3(s) + 6H2O(l) → 2Al(OH)3(s) + 3H2S(g) I found this reaction on the web.I am not able to understand why this reaction proceeds from a weaker acid(H2O) to a stronger acid(H2S);contradictory to the ...
I.Bedi's user avatar
  • 101
2 votes
0 answers
113 views

Deduce the shapes of stretching modes of a tetrahedral molecule

This question is in relation to the [FeCl4]- molecule, which is tetrahedral. I previously deduced, using symmetry analysis, that the vectors corresponding to the bonds of the molecule will be A1+T2, ...
Bartholomew696969's user avatar
1 vote
0 answers
21 views

Trend in formation enthalpy of metal fluorides

Please see below for the data I am referring to. I don't really understand why the trend in Cr ceases and reverses. I think I understand what the logic for WFn is - while the cost of forming Mn+ ...
Bartholomew696969's user avatar

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