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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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446 views

What does under-stoichiometric or stoichiometric mean?

When people talk about oxides like $\ce{SiO2}$ or $\ce{Al2O3}$, they use expressions like stoichiometric or under-stoichiometric. I understand that this refers to the relative composition of materials,...
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1answer
144 views

An example to illustrate the difference between an inversion operation and a twofold rotation

Reading in Atkin's Inorganic Chemistry book, I cam accross: Although an inversion and a twofold rotation may sometimes achieve the same effect, that is not the case in general and the two ...
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1answer
494 views

How to separate lead condensate from aluminum

A common problem in shooting sports is precipitation of lead onto aluminum suppressor baffles. (The lead presumably comes from both lead styphnate priming compound and from the base and bearing ...
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43 views

Why does the equilibrium law work mathematically and what does it really mean [duplicate]

For example consider: $$aA + bB \rightarrow pP + nN$$ where $a, b, p$ and $n$ are moles. The equilibrium constant is $$ \frac{[P]^p [N]^n }{[A]^a [B]^b}$$ Where does this come from? I don't ...
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151 views

metal salt solutions g/l means hydrate or anhydrous

I want to redo an experiment. They've used Nickel chloride: 40 g/L Nickel chloride can be bought in two forms: anhydrous ($\ce{NiCl2}$) and hydrate ($\ce{NiCl2....
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1answer
764 views

About the nomenclature: manganate or manganite?

I am a bit confused about the correct name of $\mathrm{LaMnO}_3$. Is it lanthanium manganate or lanthanum manganite? I was assuming that since $\mathrm{SrTiO}_3$ is called strontium titanate, $\...
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3k views

Why does Bismuth only create a +3 ion instead of a +5 ion?

It has 5 valence electrons, but only loses 3 of them to make a +3 ion. Why does this occur? I believe it may have something to do with how losing 3 electrons leaves you with the p sublevel full, but ...
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2answers
64 views

What is the range of sizes for molecular systems?

Molecular systems - are in a simple count systems made up of molecules. But almost every system, surrounding us are molecular than. Considering the molecular systems in terms of chemistry compels us, ...
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3answers
12k views

Formula for hypo [closed]

Can someone please tell me the chemical formula for just "Hypo"? This question came up in previous exams and I don't know what is the general /chemical formula for just "Hypo". I can find the formula ...
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1answer
2k views

Which salt precipitates from a solution of ammonium oxalate and silver nitrate?

I am supposed to write the precipitation reaction for $\ce{(NH4)2C2O4 + AgNO3 ->[\ce{H2O}]}$ Is my equation correct? I left out the Spector ions. $$\ce{4(NH4) + 2 C2 +O4\rightarrow 4(NH4)2CO3}$$
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787 views

Clathrate Compounds with Quinone

I prepared a compound "$\ce{SO2}$-Quinolclathrate" by dissolving hydroquinone and sodium sulfite with hydrochloric acid in warm water. After this, I tested a little sample of the product on a flame ...
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693 views

Crystal Field Theory diagram

I need to draw a simple crystal field splitting diagram and identify the lowest-energy spin-allowed ligand field band in the electronic absorption spectrum for [MnCl6]2-. I know the basics of the ...
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0answers
100 views

Vycor + hydrogen at 750°C - reduction? [closed]

Does anybody have experience with Vycor 96% silica tubing in hydrogen at bright red heat, around 750°C, regarding its reduction to silicon monoxide or elemental silicon?
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4answers
773 views

large wavelength range and list of x/y numerical data points of elements

I'm trying to get a set of FTIR or (FTIR like range) x/y numerical data points for a couple of elements, namely Silver, Platinum, Palladium, Gold and Sodium. I've looked on line and found images ...
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2answers
136 views

Carbon dioxide in lime ground

Is storing carbon dioxide in limestone a good idea? Wouldn't that lead to a reaction like $\mathrm{C}\mathrm{O}_2 + \mathrm{H}_2\mathrm{O}\to {\mathrm{C}\mathrm{O}_3}^{-2} + 2\mathrm{H}^+$ And then ...
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9k views

Double Displacement Reactions that produce gas [closed]

What type of double displacement reactions can form a gas. How can i determine if a double displacement reaction will form a gas?
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4answers
5k views

Why are we not supposed to heat Erlenmyer flasks?

Chemistry says that we are are we supposed to heat boiling flasks, and not Erlenmeyer flasks. However, I can't find any information about this on Google. Is there a particular reason for this? Is ...
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1answer
892 views

Testing a sodium aluminate solution

I prepared some sodium aluminate by reacting a strong $NaOH$ solution with aluminium foil and filtering the result. I now have a clear solution and I'm not sure what it is. I stopped adding aluminium ...
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3answers
23k views

Boiling point of a liquid increasing with temperature?

In my textbook, a statement is given, as follows: Boiling point of a liquid increases with increase in temperature However, I was wondering, isn't this wrong? The boiling point of a liquid always ...
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2answers
3k views

Which branches of chemistry and in what order to learn (self study)?

Hi I have decided to give chemistry another shot (it didn't take so well way back in high school). My main interest is for reading up on brain chemistry and pharmacology. I currently have a textbook ...
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2answers
102 views

How can you tell how much actually reacted in an acid base reaction

If you facilitate a weak acid base reaction. i.e. $\ce{NaOH + H2SO4}$. All of it may not react and the solutions will not neutralize. How can you determine how much actually reacted?
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3answers
15k views

The Crisscross method for finding the chemical formula

I am reading this wikipedia article that I don't understand. What I don't understand is: suppose we have two elements $X$ and $Y$ having oxidation numbers $x$ and $y$ respectively. Can we prove ...
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2answers
267 views

What does Cobaltous Oxide form with metal oxides?

I'm searching for the products to the following reactions: $$\ce{CoO + MgO -> } \small\text{(cobalt pink)}$$ $$\ce{CoO + SnO -> } \small\text{(cobalt green)}$$ I know that corresponding ...
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1answer
6k views

What happens in the reaction of ammonium dichromate and mercury(II) thiocyanate?

I found this reaction of $\ce{NH4Cr2O7 + Hg(SCN)2 ->[\Delta]\ ?}$ on youtube, and I'm curious as to how it works. I tried searching online, but didn't find much on it. Thanks.
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2answers
754 views

How easy it is for MoS2 to become oxidized

I made I high pressurized $\ce{MoS2}$ pellet, using a 6 ton pressurizer. I used very thin powder to create the pellet. I am using this pellet on beam, with some nuclear techniques. In my spectra I ...
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1answer
10k views

Reaction between ammonia and iron

I am not a Chemist or did not learn chemistry as a student. I have faced this phenomena from a natural visualization. So this question. Experiment: What will be happen if we add a solution of ammonia ...
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0answers
109 views

How many lumens from 1 gram of flash powder

Does somebody know how many lumens we get from lighting 1 gram of flash powder in pure oxygen (or normal) environment? I'm thinking about $\ce{KClO_4} $ (60%) + $\ce{Al}$ (40%) flash powder and quite ...
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1answer
119 views

How to speed up flash powder flaming reaction

Do you have an idea how can be flaming of flash powder (probably $\ce{KClO_4} $ (60%) + $\ce{Al}$ (40%) ) can be speeded up? Of course we consider the pure oxygen-in-air conditions. So how? With some ...
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1answer
1k views

Can I synthesize iron acetate like this?

The oxidation state of the iron doesn't matter too much; I am just trying to make an attractive red-brown ink. Here are some instructions I prescribed to a friend. Here's an approximately decent ...
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1answer
637 views

Light sensitive AgF decomposition reaction

Silver compounds such as silver fluoride are light sensitive (as are all other silver halides) so they will decompose when exposed to light. I'm stuck with a problem : I want to expose silver(I)...
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1answer
88 views

Would trans hydride ligands on a metal complex be beneficial for a catalyst?

Would trans hydride ligands on a metal complex be beneficial for a catalyst? Such as alkene metathesis or hydrodefluorination
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2answers
1k views

How to treat Magnesium powder and ribbon

I am a master student of nuclear physics. Due to some measurements I'd like to make, I have to use Magnesium as a beam target. Searching through the net to see it's properties I found that it can be ...
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2answers
1k views

Problems with precipitation of transition metal solution

I am trying to make a solution of "trace elements"--primarily transition metals-- for use in biological media; bacteria require elements like Cobalt, Molybdenum, iron, etc. in trace amounts. I am not ...
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1answer
403 views

Conversion of potassium dichromate solution to a less toxic solution

I have a solution of potassium dichromate ($\ce{K2Cr2O7}$) and I want to convert it to a less toxic solution. What would be the best way to do this? I was thinking of using the dissolved potassium ...
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1answer
260 views

How does a space group determine crystal structure?

If I have an intermetallic and want to know the specific arrangement of atoms in the lattice, how can I determine that? What I mean is the Cartesian (xyz) position, or the (abc) positions in the ...
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1answer
2k views

Crystal Field Explanation of Colors of Coordination Compounds

Crystal Field Theory explains colors of Coordination compounds as follows : A d-orbital splits into multiple orbitals, the process being called crystal field splitting. When white light falls on the ...
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3answers
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Why can potassium hydroxide not be used to remove atmospheric carbon dioxide?

As we know that $\ce{KOH}$ absorbs $\ce{CO2}$, then why can't it be used to remove the excessive $\ce{CO_2}$ present in the atmosphere?
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2answers
295 views

what are reduction oxidation reactions?

in the picture, the product is a neutral material, but in the illustration of the molecular structure, the compound is shown in its ions, why we can't show it in its ions even in the equation or if we ...
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1answer
1k views

Make tin nitrate?

How can tin nitrate be synthesized? Mixing nitric acid and tin makes tin oxide (I did this in chemistry class) so how can tin nitrate be created?
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1answer
451 views

What chemical reaction can cause this blue-ish deposit?

Recently I noticed that some of our glasses and cutlery had developed a blue-ish deposit as you can see for the two sets of spoons below. For each set the spoon on the left has the blue-ish deposit ...
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2answers
348 views

Is it possible to create a salt with multiple anions with only one cation(e.g. CaBrCl)?

I know that usually more electronegative anions would displace less electronegative anions but is there a way to get different anions to "share" a cation?
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1answer
244 views

Solution containing Iodine

The question is:- Iodine dissolves in a variety of solvents forming solutions that are purple, brown or any intermediate shade. This property is due to:- Hydrolysis of iodine ...
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1answer
2k views

Memorize Transition Metal Electronic Ground State

In the course of my undergraduate studies it has become clearer and clearer that it is quite helpful to know the ground electronic state of transition metals by heart, if only to speed up the process ...
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1answer
956 views

Hydration of lithium salts

Why are lithium salts heavily hydrated? I am not able to understand this because I feel salts of larger cations like Caesium should be more hydrated because of the larger size, they can able to hold ...
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2answers
782 views

How to identify ionic compounds

I have a Chemistry lab in which I must design and carry out an experiment to determine the compound in each of eight numbered vials. Each vial contains one of these ionic compounds: BaCl2 CaCO3 Ca(OH)...
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0answers
62 views

What is the nature and character of fire? [duplicate]

What is fire? Is it a material or energy or something else? Please explain it to me. My friend asked me this. I am stuck with this problem.
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1answer
1k views

is there any mnemonic for the AXE method?

Is there any mnemonic that helps remembering the names of the different geometries (Shapes) that we obtain from applying the AXE method ?
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1answer
2k views

reaction between Iron(ii) and Vanadium(v)

When we reduce Vanadium (V) using iron(II), why are we adding 85% Phosphoric acid? After the above reduction, if we are going to titrate the mixture with Potassium permanganate, why are we adding ...
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2answers
1k views

What type of sensor technologies exist to determine the chemical composition of a polymer?

Let's say I have several pieces of trash and each is made with a different type of material like: Plastic bottle : High Density Polyethylene (HDPE) Cereal box : Paperboard & Epichlorohydrin ...
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1answer
13k views

Why do the reactions of Magnesium in steam and cold water differ?

"Magnesium has a very slight reaction with cold water, but burns in steam. A very clean coil of magnesium dropped into cold water eventually gets covered in small bubbles of hydrogen which float it ...