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.

Filter by
Sorted by
Tagged with
2
votes
0answers
154 views

What reaction took place?

Okay, so I was fiddling about in the chemistry lab, and I added: Sodium Nitroprusside (soln) $\ce{Na_2[Fe(CN)_5NO]}$ with Potassium Ferrocyanide (soln) $\ce{K_4[Fe(CN)_6]}$. $\ce{Na_2[Fe(CN)_5NO]}$ ...
0
votes
1answer
5k views

Why is there a charge on COOH⁻¹?

The dissociation of formic acid ($\ce{HCOOH}$) is: $$ \ce{HCOOH -> H+ + COOH-} $$ Why is there a charge on $\ce{COOH^{-1}}$ though? Is it achieved through: $$1\times(\ce{C^{4+}}) + 2\times(\ce{O^...
3
votes
2answers
104 views

condensation of tellurium on inside of ampoule?

After heating an ampoule of tellurium around its melting point in a furnace for about a day, I've noticed drops of the element on the upper inside surface of the ampoule, as if it condensed there. I'...
0
votes
2answers
1k views

What happens when KCl, K₂Cr₂O₇, and concentrated H₂SO₄ reacts?

What happens when $\ce{KCl}$, $\ce{K2Cr2O7}$, and concentrated $\ce{H2SO4}$ reacts? I have no idea how to approach these questions. I'd love if anybody can help me see the logic behind this.
13
votes
2answers
13k views

Why does N₂ react with O₂ to Form NO at high temperatures?

This also raises questions that I have about the Haber Process which produces ammonia ($\ce{NH3}$) from molecular nitrogen ($\ce{N2}$) and hydrogen ($\ce{H2}$). I have heard multiple times that bond ...
2
votes
1answer
184 views

Boron-Boron bonds

I am reading up on boron in my notes and there is a certain paragraph that I do not understand The tendency of $\ce{B}$ to form $\ce{B-B}$ bonds is less pronounced than that of carbon, its ...
1
vote
1answer
81 views

Aluminum deoxidation gas

I am new to chemistry. I am looking for a gas that would de-oxidise aluminium. Which gases would work for that and at what temperature? Details: I need to sinter aluminium powder. But because the ...
2
votes
1answer
166 views

Could PNP (Silicon) transistor be toxic when exposed to air\light?

The story goes as follow: While I was in the electronic room I got bored and crushed a PNP transistor (Model CDIL 2N2907) using a rotating pipe jaws just like in the picture bellow. Now, it took me ...
-1
votes
1answer
148 views

Is there a positive radical Aurous, Au (x+)?

Is there a positive radical Aurous, $\ce{{Au}^{x+}}$? If yes what is the value of x? We have Auric as $\ce{{Au}^{3+}}$.
8
votes
1answer
9k views

How is the yellow colour of nitric acid removed?

Nitric acid obtained in laboratory is slightly yellow due to the dissolution of nitrogen dioxide which is produced due to thermal decomposition of a portion of $\ce{HNO3}$. $$ \ce {4HNO3 -> 2H2O ...
4
votes
1answer
896 views

Is it possible to make metal fulminates?

Is it possible to make fulminates such as: magnesium fulminate, copper fulminate, etc. by the metal + $\ce{HNO3}$ + $\ce{EtOH}$ reaction?
3
votes
1answer
167 views

Salt analysis: Position of lead ion

Why is $\ce{Pb^2+}$ present both in Group I and II of the basic radicals? Is it related to the solubity product of its salts?
0
votes
1answer
370 views

What is the chemical composition of the grignard reagent?

What is the actual chemical composition of the grignard reagent and what is the method of preparation? Can it be prepared in college laboratories?
9
votes
1answer
5k views

Treatment of copper (0) with sodium hydroxide

I recently made self-assembled monolayers (SAMs) of alkanethiols on a copper substrate. After scrubbing off the $\ce{Cu2O}$ top layer and rubbing the surface with ether and ethanol, I let my copper ...
5
votes
1answer
2k views

Safe yet strong exothermic reaction?

I'm studying chemical engineering at uni (Belgium), and this year (my 2nd) we have to develop and build a stirling engine. It has to be powered by a relatively safe exothermic reaction (not dangerous ...
5
votes
1answer
889 views

Does “covalent” AgCl (aq) exist and if so, how to quantify its concentration?

I am reading Ionic Equilibrium by James N. Butler. Using silver(I) chloride in excess aqueous chloride as an example it speaks of several forms: $\ce{AgCl (s)}$ i.e. the ionic crystalline salt, $\ce{...
10
votes
1answer
263 views

What is the actual reason behind PCl₅ existing as an ionic solid?

Why does $\ce{PCl_5}$ exists in the solid state as $\ce{[PCl_6]^{-}[PCl_4]^{+}}$? What is the problem with it that it doesn't exist in its original form in solid state? Like why isn't it just $\ce{...
2
votes
1answer
99 views

Adding acid to hydrates

What would happen if I added $\ce{Na2CO3 \cdot n(H2O)}$ to a solution of $\ce{HCl}$? Could I consider the reaction the same as just $\ce{Na2CO3 + HCl -> NaCl + CO2 + H2O}$?
7
votes
2answers
418 views

Why do H₂ and O₂ create H₂O?

Both $\ce{H2}$ or $\ce{O2}$ are stable molecules. However when given energy they heat up and form $\ce{H2O}$. My teacher explained that the increased energy breaks the bonds, allowing new ones to form....
3
votes
1answer
8k views

Does ozone (O₃) gas have a color? [closed]

Does ozone have a color or is it colorless? I have heard that ozone has a bluish color. Could someone explain this observation scientifically?
3
votes
2answers
1k views

Can artificial sea water be prepared by mixing sea salt with water?

I am looking for ways to easily prepare artificial sea water. The chemical composition doesn't have to exactly match that of natural sea water. On-line I can find recipes to prepare sea water. But I ...
5
votes
1answer
562 views

Why is magnesium hydroxide not hygroscopic?

I asked this question today and my professor was unable to provide any rationale. I know that sodium hydroxide is hygroscopic, but why not magnesium hydroxide (at least to the same extent as $\ce{...
6
votes
1answer
262 views

Why do people assume 28 oxygens in chlorite mineral formula?

I have been trying to calculate chlorite mineral formulas from microprobe data. However, all of the mineral formula spreadsheets on the internet, including those from the Open University assume 28 ...
2
votes
1answer
225 views

45.9 gram sample of borane (a compound containing only boron and hydrogen) and is 85.63% boron. What's the mass of hydrogen in this sample?

45.9 gram sample of borane (a compound containing only boron and hydrogen) that's 85.63% boron. What's the mass of hydrogen in this sample? I was just going to take 45.9 grams and multiply by .1437 ...
0
votes
2answers
1k views

Balancing Ionic and Net Ionic equations

I am currently taking a chemistry course about acids and bases. One of the things I am a bit confused about, is the acid and base neutralization reaction, and how to balance it. For Example: $$\ce{...
1
vote
2answers
898 views

How to draw Lewis dot structures?

What is the most logical and easy to remember step by step method for drawing Lewis dot structures? I'm having trouble drawing a simple one for $\ce{CO2}$.
3
votes
1answer
152 views

Carbonate + acid reactions - How to recognize these type of reactions?

So I've got $$\ce{CaCO_3 + HCl \rightarrow CO_2 + H_2 O + CaCl_2}$$ I'm wondering how I can recognize these types of reactions? I know that when I mix an acid and a base I get salt and water but in ...
2
votes
2answers
182 views

Rate constant and Michaelis Menten

Please consider the following figure of a concentration over time (msec) diagram with variables for an enzyme, a substrate bound enzyme and a product. Recall that $\ce{E + S \leftrightharpoons ES \...
1
vote
1answer
238 views

MO scheme for coordination complexes (tetrahedral) - Heteroligand vs. homoligand

How is the MO diagram drawn for a tetrahedral complex with heteroligands (e.g. $\ce{[NiCl2(PPh3)2]}$) different from a tetrahedral complex with the same type of ligand? Do we consider the same "a1 and ...
2
votes
1answer
2k views

LiAlH4 / H2O reaction energy

I'm dealing with a free-energy scam on another forum. It is well-known that $\ce{LiAlH4}$ reacts explosively with water. My chemistry days are long behind me, so I thought I'd come here to ask: $1~\...
0
votes
1answer
252 views

In ionic solids such as NaCl, do the cations fill interstital holes in the cation's cubic close pack structure? [duplicate]

Are binary ionic solids like $\ce{NaCl}$ comprised of a cubic close packed structure of the anions with the cations filling interstital holes or do the cations and the anions contribute to the cubic ...
0
votes
1answer
105 views

Nomenclature of inorganic compounds

As depicted in books, $\ce{NO3-}$ and $\ce{NO2-}$ are called as nitrate and nitrite respectively. Where (-ate) suffix is used for higher oxidation state and (-ite) suffix is used for lower oxidation ...
5
votes
2answers
8k views

Is tetraammine dichloro cobalt (III) an optically active compound?

Is $$ \text{Co}[{(\text{N}{\text{H}}_{3})}_{4}{\text{Cl}}_{2}]$$ optically active? If so, write its stereo-isomers. I know that for a compound to be optically active, it should ...
4
votes
1answer
2k views

Stability of Sulfides - backbonding?

A stability model premised on Lewis acid-base covalent bonding can be proposed to rationalize the stability shown by sulfides such as CuS and Ag2S. For instance, although the oxide anion is a stronger ...
1
vote
2answers
1k views

Thermogravimetric Analysis of hydrated compounds

I have been given this thermogravimetric analysis of my compound $\ce{NiBr2.$x$\,H2O}$ and I need to work out the number of moles of water in the complex. Also why are there two steps in the data?
2
votes
1answer
592 views

What does it mean in a Ni(II)complex if the HNMR spectrum appears unbroadened and unshifted & what does this tell you about the coordination geometry?

I am trying to work out the an unknown Ni(II) complex. I don't known the geometry and I have read that broad lines on the nmr spectrum indicate large compounds with symmetric environments. Does this ...
8
votes
1answer
987 views

Inorganic chemistry reaction mechanisms

Are there well developed reaction mechanisms in inorganic chemistry like those in organic chemistry? If yes, please suggest an easy to follow reference.
15
votes
5answers
1k views

Is it still possible for an amateur, a hobbyist, or a science buff to make relevant discoveries in chemistry today? [closed]

Consider astronomy. Hobbyists and amateurs are today still able to make small to moderate scientific contributions to their field. Is the same true in chemistry? I think there might be at least two ...
7
votes
1answer
477 views

Would there be a difference if deuterium is embedded instead of protium (regular hydrogen) in acids?

So instead of regular hydrogen, it would be a deuterium (still a Hydrogen). For example, instead of $\ce{HCl}$ it would be $\ce{DCl}$ where D is a deuterium.
0
votes
1answer
602 views

Is it true that under certain conditions, Mg can reduce SiO2?

Is it true that under certain conditions, Mg can reduce $\ce{SiO2}$ and the latter the former? What are those conditions?
6
votes
2answers
4k views

Why does reduced mass help when talking about two body problems?

Firstly I would like to say that despite the fact that you may be thinking that this is a physics question and should probably be asked on that part of the website, I came across reduced mass for the ...
2
votes
1answer
2k views

Prepare 1 liter of 28% NH3(aq) solution from 1 gal of %10 NH3(aq)

I have one gallon of commercial, surfactant free, ammonium hydroxide solution that I would like to use to prepare a concentrated solution. I have two options as I see it, and I am still getting into ...
1
vote
0answers
71 views

Why are d-orbitals required/used for hypervalent molecules (where the central atom has expanded its octet) [duplicate]

Period 2 elements like carbon, oxygen and nitrogen cannot expand their octet because they cannot make use of d orbitals in that energy level (they don't exist). However, period 3 elements like sulfur ...
0
votes
1answer
82 views

How do I know with which oxidation numbers I can form a certain kind of compound?

Take, for istance, phosphorus; it has eight different oxidation numbers, but it can only form two different anhydrides, phosphoric (when the oxidation number is 5) and phosphorous (when it is 3). How ...
3
votes
1answer
1k views

How Does The Mordant, Ferric Acetate, Interact With Tannins When Ebonizing Wood?

Ferric Acetate (II) and (III) are "mordants," which intensify wood staining in direct proportion to the tannin concentration in the wood. Some wood stainers add tea to increase the tannin content and ...
5
votes
2answers
3k views

Why does Cobalt have different coordination numbers in its complexes with water and thiocyanate?

I'd like to know why does cobalt(II), $\ce{Co^2+}$, form $\ce{[Co(H2O)6]^2+}$ complex with water while it forms $\ce{[Co(SCN)4]^2-}$ with the thiocyanate? Why is there $\ce{6H2O}$ but only $\ce{4 ...
2
votes
1answer
111 views

Which one of the compounds listed would we use in order to get the highest concentration of sulphate ion in a saturated solution?

Solutions are prepared by dissolving a sulphate salt in water. Which one of the compounds listed would we use in order to get the highest concentration of sulphate ion, SO42-, in a saturated solution? ...
0
votes
1answer
85 views

Can anyone explain the reaction mechanisms of these synthesis?

Can anyone explain the reaction mechanism of the following synthesis? $\ce{2NH4Cl + Ca(OH)2 -> 2NH3 + 2H2O + CaCl2}$ $\ce{(NH4)2SO4 + 2NaOH -> 2NH3 + 2H2O + Na2SO4}$
2
votes
2answers
10k views

Will heating alumina (Al2O3) to its melting point yield pure Al?

My inorganic chemistry is at a basic level, so my question is, if I heat alumina ($\ce{Al2O3}$), to its melting point around 2000 C, will I wind up with pure Al? I think the oxygen will release from ...
6
votes
2answers
4k views

Wade's rules for Zintl ions

How do you apply Wade's rules to Zintl polyhedral cluster anions ? For example, I believe $[\ce{Bi_3}]^{3-}$ is a triangle. My approach to justify would be: 5 electrons per each Bi atom 3 electrons ...