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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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2answers
1k views

What's a natural substitute for baking powder or baking soda? [closed]

What's a natural substitute for baking power or baking soda? I am doing a project where I need a raising agent in liquid form. Naturally, I can't use anything carbonated so baking powder/soda are out ...
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1answer
815 views

How do I perform a gravimetric analysis of Portland cement?

To determine the silica ($\ce{SiO2}$) content in Portland cement by gravimetric analysis it is digested in $\ce{HCl}$ and the silica residue is eventually measured. The chief constituents are $\ce{...
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1answer
3k views

Does washing soda (sodium carbonate) turn into baking soda (sodium bicarbonate) over time?

I have some sodium carbonate. But it's over 20 years old and was not kept in tight bottle. I wonder if this compound absorbs $\ce{H2O}$ and $\ce{CO2}$ from air. I guess I'd need to burn it a little ...
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Why does calcium carbonate decompose into calcium oxide?

Why does calcium carbonate, when heated strongly, decompose into calcium oxide and carbon dioxide? What is the mechanism? Can someone illustrate the means by which this happens? What bonds/...
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1answer
331 views

Balancing redox equation

So I had these two reactions that confused me .. I tried the standard way of balancing it (Putting oxygen number everywhere, +1,+2,-2 etc.) and then go on with it but it didn't work So anyways here ...
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NCl₃ + H₂O → NH₃ + HOCl , the resulting solution is acidic, basic or neutral?

When $\ce{NCl3}$ is dissolved in water, $\ce{NH3}$ and $\ce{HOCl}$ is formed. Can you please explain me whether formed solution is acid or basic or neutral? thank you!
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1answer
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MO-Scheme of SCN- and its bonding properties when used as a ligand

I tried to figure out the MO-scheme of the tetragonal-bipyramidal complex trans-$\ce{[Co(en)2(NCS)2]SCN}$ in which the isothiocyanate ligands are bound to the $\ce{Co^3+}$-Ion in $\eta^{1}$-mode (en = ...
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1answer
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How do I determine the crystal field splitting for an arbitrary point group?

How can I figure out the degeneracy of the d orbitals for a site that has a given point group? Specifically I'm interested in $D_{3d}$ and $D_{3h}$, but it would be good to know how to do it in the ...
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1answer
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Any suggestions how to solve this?

$m(\ce{FeSO4. $x$~H2O})=20.0\:\mathrm{g}$ $N(\ce{H2O})=3.03 \cdot10^{23}$ $x=?$ What I've done: (1.) \begin{aligned} m (\ce{H2O})&= \frac{N(\ce{H2O}) \cdot M(\ce{H2O})}{N_{A}}\\ &=...
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Why are many silver salts insoluble?

For example, silver chloride, silver sulfide, and silver oxide are three exceedingly stable silver salts in water solution. Why is it that silver forms such stable salts? Does this have to do with ...
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0answers
137 views

Co(H₂O)₆ , a low spin coordination complex,why? [duplicate]

Despite $\ce{H2O}$ being a weak field ligand, why is $\ce{[Co(H2O)6]^3+}$ a low spin complex?
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2answers
492 views

Is NaHCO₃ a carbonate?

I know that $\ce{NaHCO3}$ is sodium bicarbonate, but According to Wikipedia: In chemistry, a carbonate is a salt of carbonic acid, characterized by the presence of the carbonate ion, $\ce{CO3^{2-}}$...
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0answers
102 views

What are the possible side reactions when preparing iron(III) naphthenate?

I am trying to prepare some iron(III) naphthenate. And the raw materials are : ferric(III) chloride, and naphthenate acid, NaOH, toluene, deionized water Everything worked well in lab scale: final ...
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0answers
101 views

Making a reasonable slab of alpha quartz

I want to perform a molecular dynamics simulation with alpha-quartz as my mineral surface. I want to study adsorption of water on alpha-quartz. The most dominant error that I came up with is the ...
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1answer
911 views

Can silica gel beads cause silicosis if crushed?

Can silica gel beads (which I believe are amorphous) when crushed to dust cause silicosis?
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0answers
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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 ...
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2answers
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Elemental Silver Colour

What is the colour of elemental Ag? I have doubt whether it is black or silver in colour. In Tollens' test, we get a silvery precipitate of elemental silver - hence silver in colour. I have read ...
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1answer
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Why Fe(CO)5 exists, but Fe(NH3)5 doesn't?

Like in title: Why $\ce{Fe(CO)5}$ exists, but $\ce{Fe(NH3)5}$ doesn't? Edit: As Jan Dvorak pointed out, it may exist. If so: why is it so unstable?
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1answer
403 views

Zinc Picolinate - Positive, negative or neutral charge?

I'm going to be using a finings agent with a positive charge to remove negative trub from a solution (beer). I would like to keep some chelated zinc in the solution - ideally zinc picolinate - so ...
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1answer
463 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
149 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
522 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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0answers
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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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1answer
154 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
788 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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1answer
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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
66 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
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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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1answer
795 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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1answer
742 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
104 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
811 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
143 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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2answers
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
6k 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
922 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
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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
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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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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
274 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
773 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
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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
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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
127 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
2k 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
662 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
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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