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.

696 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
1
vote
0answers
64 views

Looking for a common solid which is very soluble in water, insoluble in a volatile solvent, and doesn't corrode ferrous metals

I'm looking for a way to make a shiny object 'matte', but temporarily. I'd like to be able to spray on a coating which is a uniform colour and wash it off easily, even from small 'nooks and crannies' ...
1
vote
0answers
1k views

Iron (II, III) oxide and concentrated nitric acid

According to the Russian Wikipedia, the reaction goes as follows: $$\ce{Fe3O4 + 10HNO3 -> 3Fe(NO3)3 + NO2 + 5H2O}$$ Since $\ce{Fe3O4}$ is often written out as $\ce{Fe2O3*FeO}$, why don't we have ...
1
vote
0answers
155 views

Theoretical Concentration (in PPM) of CO2 production after 1 minute

I recently conducted an experiment to determine ideal ratio of baking soda and citric acid that would produce the most amount of CO2 in water. We used 250ml flasks filled with 120ml water. The samples ...
1
vote
0answers
21 views

Parameter effects on kinetics of esterification for bio-diesel production

I want to discuss the effect of parameters on the kinetics of esterification for bio-diesel production. In esterification process, temperature effect and molar ration are two important parameters. ...
1
vote
0answers
47 views

Why would a reaction take place in this instance?

This makes little sense to me, both of the electron configurations are d6, and would presumably be low spin - therefore both reactants should be inert, and yet my notes suggest that an electron ...
1
vote
0answers
356 views

What gives variations in the color of cadmium sulfide paint pigment?

Oil paint manufacturers sometimes make several "shades" of a color, all of which list the exact same chemical ingredient. For example, look at Gamblin's artist grade oils, in the yellow colors, ...
1
vote
0answers
345 views

How many electrons does boron have on average in B2H6?

The boron interaction with hydrogen gives it one electron I suppose, but then the octet is not complete. So how many electrons does the boron atom have exactly and why?
1
vote
0answers
210 views

Comparing strengths of Hydrogen Bonds

What kind of a bond is the Hydrogen bond? Is it electrostatic forces of attraction or more like a partial coordinate bond? What pair of atoms would provide us the strongest Hydrogen bond? If we ...
1
vote
0answers
719 views

solubility trends of alkaline earth metals

Why is the solubility trend of group 2 oxalate compounds inconsistent with the actual order in the periodic table?
1
vote
0answers
669 views

Why do nitro groups preferentially bond through the nitrogen rather than the oxygen?

In many organic and inorganic molecules which contain a nitro group, the bonding takes place through the nitrogen, which gives the nitrogen "four" bonds, but the $\ce{N-O}$ bonds are delocalized ...
1
vote
0answers
94 views

How to remember/write molecular formulas?

For example, when given the reactants and asked to write a complete formula including their products for nitrogen and oxygen...: $\ce{N2 + O2 -> 2NO}$ (this is the correct one right) but what ...
1
vote
0answers
23 views

Voltage sensitive compounds that undergo a conformational change?

In nature, the Ca/Na/K channels which consist of groups protein are often voltage sensitive and undergo conformational changes in response to voltages on the order of mV. Are there any known classes ...
1
vote
0answers
181 views

Qualititative inorganic analysis

Why is it that a specific order is followed while performing qualitative inorganic analysis? I mean, why are we told to first test for the anion in the given salt (and there is an order to be followed ...
1
vote
0answers
29 views

How can I restore the surface of ABS polymer products?

Recently I asked a question about de-yellowing Lego. I have a follow-up question on this. I try to design a setup where I can de-yellow Lego and remove/obscure any scratches from the surface of Lego ...
1
vote
0answers
120 views

What factors influence the resultant oxidation state of Fe in 3Ca(OH)2+2FeCL3?

$\ce{3Ca(OH)2 + 2FeCl3 -> 2Fe(OH)3 + 3CaCl2}$ What factors influence the resulting oxidation state in the iron hydroxide molecule in this reaction? Since iron's oxidation state ranges from +2 to +...
1
vote
0answers
71 views

Radiating chemical suggestion?

Given a flat and thin object laying on a table, such as a small piece of silver paper or a small piece of cardboard, I want to find a way to detect which face of it is facing up. The solution should ...
1
vote
0answers
479 views

Comparing IR stretching bands in molybdenum complexes

Why would the infrared stretching frequency of $\ce{CO}$ (which is about $2140~\mathrm{cm^{-1}}$ in gaseous form) be $1982~\mathrm{cm^{-1}}$ in $\ce{[Mo(CO)_6]}$ and even lower in $\ce{[Mo(CO)3(η^6$\...
1
vote
0answers
1k views

Difference in the change in oxidation states of transition elements and p-block elements

In transition elements the oxidation states differ by one (+2 to +7 in Mn). However, in the p-block elements, the oxidation states differ by two (-1,+1,+3,+5 in the halogen group). Why is this so?
1
vote
0answers
82 views

How dangerous are non-soluble trivalent thallium compounds?

I am PhD student in solid state physics. I have been working with a fine powder of a transition metal oxide containing trivalent thallium. The oxide is not soluble in water. In my university, ...
1
vote
0answers
46 views

Sulfur atomic absorption

Would the atomic absorption from FAA for Sulfur be from 3s2 -> 3p4 or 3p4 -> 4s0? I think according to the electronic partition function, there would be zero electrons in the 4s0 state at the ...
1
vote
0answers
59 views

Oxidation state of iron ions in a unit cell

Consider UC (unit cell) for a cubic ionic lattice containing 4 oxide ions - what is the avg oxidation state for Fe ions in this lattice? The four oxide ions create a -8 charge that must be ...
1
vote
0answers
57 views

Pharmaceutical grade phosphoric acid

I am looking for a specification for pharmaceutical grade phosphoric acid.
1
vote
0answers
91 views

I'm not sure I understand the stoichiometry of this mechanism

I was going through the experimental mechanism of nickelocene synthesis, and I looked through the notes and it said that there would be $\frac12$ $\ce{NiCl2}$. I'm sort of confused by the $\frac12$. ...
1
vote
0answers
59 views

Why do hydroxyl ions migrate towards the anode in a Bacon Cell?

Why do hydroxyl ions in a Bacon cell migrate towards the anode? Is it because of the relative concentration of the different ions in the set-up? According to the set-up of the bacon cell, the anode is ...
1
vote
0answers
991 views

Why are the melting points of Sb and Bi lower than that of As?

My book says it has something to do with the inert pair effect. And unlike As, Sb and Bi tend to form 3 covalent bonds rather than 5. I don't understand what's really going on here.
1
vote
0answers
126 views

Qualitative Analysis for Chemistry Project

I am making a chemistry project wherein I wish to analyze the contents of purified and unpurified water, mainly the salts contained in them. What I wish to know is: What is the best way to do this? ...
1
vote
0answers
846 views

Predict flame test color?

If you know the composition of any sample of compound, is it possible to predict it's flame test color? For eg, if you can given Sodium Chloride, then without actually doing the flame test, can you ...
1
vote
0answers
1k views

How does crystal field stabilisation energy relate to the stability of a complex?

I know how the crystal field stabilization energy is calculated, but how does it reflect stability? CFSE measures the energy relative to the barycentre, not the initial energy of the $d$ orbitals. For ...
1
vote
0answers
717 views

Is Potassium Silicate better than Sodium Silicate (water glass) in a refractory?

I would like to know whether Potassium Silicate is a better binder than Sodium Silicate in making refractory bricks. A search on the internet on a 'vs' question relating to the two says that ...
1
vote
0answers
39 views

Internal treatments of gas cylinders for toxic gas mixture

The values of toxic components like $\ce{H2S}$, $\ce{NO}$, $\ce{SO2}$, etc. [in ppm level] get decreased after a while due to adsorption phenomenon. Manufacturers design some internal treatments in ...
1
vote
0answers
178 views

Speculation about chlorine dioxide isomer

I know that chlorine can have a positive charge in the case of oxides. But what I am wondering is if chlorine dioxide can form a ring and if so how likely it is. $\ce{O=Cl=O -> O- -Cl-O- -> (...
1
vote
0answers
302 views

Is there a way to find the kinetics data for the strong acid weak base reaction?

I am layman of chemistry. Latterly, I am asked to do an mathematical optimization task for a bio-chemical process, which contains a conditioning step to neutralize the sulfuric acid using ammonia ...
1
vote
0answers
426 views

Why leveling effect is reduced when strong acid is dissolved in a weaker acid than water?

I am reading a book that basically states what is the title. This is something I observed when I was doing ICE charts: when acid and base neutralize, we always assume complete neutralization. ...
1
vote
0answers
2k views

Why [MnCl6]^2- has got 4 unpaired electrons instead of 3?

In $\ce{[MnCl_6]}^{2-}$, $\ce{Mn}$ has +4 oxidation state which gives it a $\ce{3d^3}$ $\ce{4s^0}$ configuration. But how is it having 4 unpaired electrons?
1
vote
0answers
60 views

Why does this reaction take place in terms of electronic structure?

I need to know, in terms of electronic charge - the electrophiles and nucleophiles involved - how the electronegativity of the potassium and hydrogen atoms alongside the hydroxide and H+ ions result ...
1
vote
0answers
132 views

What distinguishes a Lewis Complex from an Adduct or are they synonymous?

I cannot think of a distinction - the terms seem to be used interchangeably when talking about products of Lewis acid-base reactions. However, I am concerned that I may have overlooked a subtlety. ...
1
vote
0answers
134 views

What happens when adding swimming pool salt to a freshwater pool?

Why does adding swimming pool salt to a freshwater swimming pool cause a white sediment to build up and stick to the floor of the pool?
1
vote
0answers
455 views

How to determine an unknown gas in a tube with a massless piston at equilibrium conditions?

There is a massless piston that can move freely in a horizontal tube that is closed at both ends. To the left, there is a sample of helium gas at $300~\mathrm{K}$ and $4~\mathrm{atm}$. To the right, ...
1
vote
0answers
68 views

Identifying probable compound using its colour & reactants

This is quote from OxyChem document on Hypochlorites: Steel tanks in caustic soda service become passivated with a gray-black film forming on the metal. Thereafter, caustic soda at less than ...
1
vote
0answers
1k views

CFSE/LFSE Explains Hydration Enthalpy

Time and time again textbooks and websites state how wonderful it is that the deviations of Hydration Enthalpies from a linear relationship can be accounted for by the CFSE parameter for the ...
1
vote
0answers
445 views

Decreasing rate of reaction between I2(s) and H2(g)?

Which change will decrease the rate of the reaction between $\ce{I2(s)}$ and $\ce{H2(g)}$? (A) Increasing the partial pressure of $\ce{H2(g)}$ (B) Adding the $\ce{I2(s)}$ as one piece ...
1
vote
0answers
853 views

Split carbonate ions?

Can you split carbonate ions into their constituent elements directly in the carbonate form? (so not first producing $\ce{CO2}$ and then decomposing the carbon dioxide) (edit:) I know that when ...
1
vote
0answers
444 views

Most economical method to convert potassium oxide to potassium nitride.

I have a compound potassium oxide($\ce{K2O}$) and I am trying to convert it into potassium nitride ($\ce{K3N}$). Here are a few possible reaction methods : Split potassium oxide into the constituent ...
1
vote
1answer
90 views

Laboratory setup for the distillation of sulfuric acid

Purification of Laboratory Chemicals, 5th Edition, by Armarego, reads (p. 53): Reagents such as water, ammonia, hydrochloric acid, nitric acid, perchloric acid, and sulfuric acid can be purified via ...
1
vote
1answer
163 views

Applications of magnesium sulfate monohydrate MgSO4 · H2O

How is magnesium sulfate monohydrate $\ce{MgSO4 * H2O}$ used for in chemistry and how does it work as a valuable laboratory drying agent? I could not find too much information in my book or the ...
1
vote
1answer
2k views

Sodium Peroxoborate reacting with Sulfuric Acid and Potassium Permanganate

This is one of the reactions I had to undertake in a lab. I think the reason for the test in the first place is to test for the peroxoborate anion in the solution. From my understanding what's ...
1
vote
1answer
662 views

Arrangement of elements in the reactivity series

I have seen a variety of reactivity series of elements online and also have consulted some books regarding the arrangement of the elements. I understand that the arrangement of elements is based on ...
1
vote
1answer
4k views

How do we get NaClO3 in the reaction between Cl2 and NaOH?

From problem no. 4080 in a Russian example exam set: $$\ce{6NaOH + 3Cl2 -> NaClO3 + 5NaCl + 3H2O}$$ How do we get that $\ce{NaClO3}$? I can't seem to guess. I found this explanation on YouTube, ...
1
vote
2answers
1k views

Which is more acidic HOF or HOCl?

My attempt to the question: We know that more polar the $\ce{O-H}$ bond, the more acidic is the compound. According to electronegativity, the $\ce{O-H}$ bond of $\ce{HOF}$ should be more polar than $\...
0
votes
0answers
9 views

The covalent bond in HCl and the Lewis model

Can the formation of the covalent bond in HCl be explained through the hybridization model? We know for sure that it can be explained by the theory of molecular orbitals. In this way, it would be ...

1
8 9
10
11 12
14