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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3answers
8k views

Why isn't the American nickel magnetic?

I never thought that modern American nickels actually contained nickel anymore. However, according to this wiki article, the coins actually do contain 25% nickel, the rest being copper. And yet, no US ...
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What are inorganic nomenclature principles used in different languages?

There are different inorganic nomenclature principles used in different languages. For example, the most used is Lavoisier's nomenclature, which is based on the higher/lower oxidation state e.g. ...
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1answer
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How does Potassium Hexfluoronickelate(IV) exist in a stable state?

Nickel generally does not exist in a $+4$ Oxidation state. Wikipedia has the following to say regarding Nickel(IV): Ni(IV) is present in the mixed oxide $\ce{BaNiO3}$. ....... Ni(IV) remains a rare ...
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1answer
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are there any stable four membered chelate rings?

With reference to coordination compounds, most chelate rings formed with the metal atom and ligands are 5-member rings (including the central metal atom), such as complexes with Oxalate, ...
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244 views

Why can't ligands with “locked structures” undergo chelation?

The following quote is from the book Concise Inorganic Chemistry by J.D. Lee (Adapted by Sudarsan Guha), from the chapter "Coordination Compounds", page 177: ...it must be noted that $\ce{NH2NH2}$ ...
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1answer
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What is the shape of [Cr(NO)₄]?

I was learning about crystal field theory recently. I am quite confused about predicting the shape of $\ce{[Cr(NO)4]}$ complex because I am not able to conclude whether it will be square planar or ...
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Noble Gases are stable

One of the most important concepts in chemical bonding at least with valence bond theory is that every element wants to have an electron configuration of a noble gas. But why is that? If we have the ...
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1answer
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+50

Why is Cr²⁺ is a good reducing agent but Mn³⁺ is a good oxidising agent?

The question is the same as the title states. In my textbook,[NCERT Chemistry I for Class 12 , pg no 217.] the following is written $\ce{Cr^{2+}}$ gets converted to $\ce{Cr^{3+}}$ as the +3 ...
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Why is the crystal field splitting energy larger for square planar than octahedral complexes?

I recently came across a fact that for the same combination of metal and ligand, the crystal field splitting energy for square planar complexes is larger than that of the corresponding octahedral ...
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1answer
123 views

Electrolytic Refining of Silver Nitrate

I read that the electrolytic refining of Silver is done using dilute silver nitrate as an electrolyte and a small percentage of free $\ce{HNO3}$. The following reactions are possible at the anode: $$\...
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How do a write the skeletal structure of the a transition metal complex in particular a BaIrO3 Perovskite? [closed]

I want to write down a 2d representation of the BaIrO3 Perovskite like I would with polyacetylene. I now people can draw these diagrams for transition metal complexes, but i don't really understand ...
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Baking Soda and Vinegar: Are there any secondary reactions?

I want to run a Lego Pneumatic Engine on the CO2 that is produced, but before I do, I want to be sure that that's the ONLY gaseous product from a real-world reaction. Everyone seems to assume that it ...
4
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1answer
229 views

What do 'sigma' and 'pi' in front of ligands in the formula of a coordination compound mean?

The following coordination compound was given in the book Concise Inorganic Chemistry by J.D. Lee (Adapted by Sudarsan Guha) under the topic 'Effective Atomic Number (EAN)': $\ce{[Ti(\sigma -C5H5)2 (\...
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Which salts precipitate from a potassium/sodium chloride/sulfate solution?

This is not a homework question. I am not in any course of study. The following question arises from my personal curiosity. If 1 mole of sodium sulfate and 2 moles of potassium chloride are dissolved ...
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Bond strength and length of HF and H2O

I know that acidity of an acid increases across a period (with electronegativity increase of the atom bonded to hydrogen) and hence $\ce{HF}$ is more acidic than $\ce{H2O}$ or $\ce{NH3}$. But the ...
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1answer
54 views

Alkali metals chemistry

Ok my understanding of the electronic structure of atoms could be wrong but this is why I don't understand:Why alkali metals are so much electropositive. Some high school professor in chemistry would ...
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0answers
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Can ZrO2 be made fluoride resistant?

$\ce{ZrO2}$ has great properties, biocompatibility, chemical resistance, decent scratch resistance, great thermal resistance and refraction, but it could be better. It, like glass, will slowly react ...
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C2 molecule has two pi bonds but such a thing is not observed in O2 molecule

As per molecular orbital theory, the electronic configuration on $\ce{C2}$ molecule is:- $\ce{σ_{1s}^2 σ^*_{1s}^2 σ_{2s}^2 σ^*_{2s}^2 (π_{2p_x}^2=π_{2p_y}^2)}$ here, the last four electrons which are ...
5
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1answer
60 views

What is the naming convention for Sn and Pb in inter-metallic compounds?

How would one go about naming inter-metallic (specifically, transition post-transition) compounds containing tin and lead? It is usually easy figuring out the naming of such compounds as they follow ...
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2answers
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dsp3 and sp3d hybridization — what is the difference and which applies to square pyramidal?

What is the difference between $\mathrm{dsp^3}$ and $\mathrm{sp^3d}$ hybridization? Are they one in the same? Also, I have a book that says that in compounds where the central atom is $\mathrm{dsp^3}$...
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1answer
427 views

How do I calculate the normality of NaBrO3?

Find the mass of $\ce{NaBrO3}$ required to prepare $\pu{150 ml}$ of $\pu{0.75 N}$ solution based on the reaction $$\ce{BrO3- + 6 H+ + 6e- -> Br- + 3 H2O}$$ My analysis: $\pu{150 ml}$ solution ...
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What is the likely mechanics as to why moist white Fe(OH)2 , on air exposure, forms a green tint?

The question is based on this Wikipedia comment: Iron(II) hydroxide is a white solid, but even traces of oxygen impart a greenish tinge. The air-oxidized solid is sometimes known as "green rust". ...
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0answers
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Is honey a good choice for chemistry senior essay? [closed]

I am doing my senior essay on chemistry and I was interested in honey, the only thing that's scaring me is that my content is more of biology rather than chemistry, in other words, does honey involve ...
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Distinguishing between different geometries of bromochlorobis(triphenylphosphine)platinum(II) using ¹⁹⁵Pt NMR

Question The question off which I am basing my question assumes that $\ce{[PtClBr(PPh3)2]}$ can exist in either the square-planar or tetrahedral geometry. If one would use $\ce{^{195}Pt}$ NMR ...
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2answers
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Confusion about the oxidation state of copper in copper cyanide re-dissolved with excess cyanide

$\ce{CuSO4}$ when reacts with $\ce{KCN}$ forms $\ce{CuCN}$ while it is insoluble in $\ce{H2O}$. It is soluble in excess of $\ce{KCN}$ due to the formation of the following complex: a) $\ce{K2[Cu(...
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2answers
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Is reduction of copper oxide a combustion reaction?

Is the following reaction a combustion reaction or just a single displacement? Could be both? $$\ce{H2 + CuO -> Cu + H2O}$$ A friend of mine claims it is a combustion reaction because it is ...
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3answers
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Why does sulfate have this structure?

Look at the structure for sulfate: Why does sulfur form so many covalent bonds. Its valency is only $-2$, it only needs two electrons, yet here it's getting $6$. The same thing happens with ...
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1answer
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Finding initial amount of ammonia using equilibrium constant and amount of nitrogen gas

Question When an amount ammonia is added at $\pu{600 K}$ in a $\pu{1 L}$ container the following reaction takes place: $$\ce{N2(g) + 3 H2(g) <=> 2 NH3(g)}$$ The equilibrium constant ...
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Is it correct to assume that by multiplying concentration with molar mass, I can calculate the number of grams in a solution? [closed]

I was wondering, if I am given a solution of NaCl (for exmaple) and I know how much it weighs (lets say 1000 g for the sake of argument), can I calculate how much NaCl there is in that solution by ...
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2answers
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Reaction between halogens and concentrated nitric acid

I have read that the reaction between $\ce{I2}$ and conc. $\ce{HNO3}$ gives $\ce{HIO3}$ and $\ce{NO2},$ but there is no mention of the other halogens' products. Do they all give halous acids and ...
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4answers
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Does heavy water taste sweet?

In this YouTube video from Cody's Lab, Cody claims that heavy water tastes sweet. He does some fairly convincing comparisons but still expresses a little doubt that the effect is real. Has this been ...
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1answer
35 views

Indirectly Measuring Diffusion of NO2 into Water

I am working on a data science project with the central hypothesis is that air-born pollutants can become water-born through diffusion. The example I am using as a proof of concept is $\ce{NO2}$. The ...
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Oxygen analogue of benzene [duplicate]

Cyclic ozone is theoretically possible although it has been found in some cases, so is a six-membered oxygen ring (oxygen analogue of benzene) theoretically possible too?
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1answer
84 views

Chemical change - decomposing single element? [closed]

If I had a molecule of a single element such as atmospheric oxygen O2, and I added energy to decompose it into two separate oxygen atoms (i.e. O2 + ENERGY –– 2 O ) is this a chemical or physical ...
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1answer
427 views

What is the reaction between nitric acid and fluorine?

Nitric acid, $\ce{HNO3}$, is a strong oxidising agent as well as fluorine, $\ce{F2}$. What will be the reaction when pure $\ce{F2}$ gas is bubbled through 100% pure $\ce{HNO3}$. While searching, many ...
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0answers
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Why does silver stick to the glass in Tollens' test? [duplicate]

Why does it not simply form a solid powder at the bottom of the flask? Does silver also stick to the glass in other silver precipitating reactions? EDIT: My question is definitely not the same as ...
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1answer
102 views

Calculating the biological standard potential

I have an electrochemical cell with following overall reaction: $$\ce{5 Sn^4+ + 2 Mn^2+ + 8 H2O <=> 5 Sn^2+ + 2 MnO4- + 16 H+}$$ I have defined the half reactions as: $$ \begin{align} \ce{Sn^...
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1answer
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Acidity order of xenon fluorides,oxides and oxofluorides [closed]

The acidity order of xenon oxides,fluorides and oxofluorides is: $\ce{XeF6 > XeO2F4 > XeO3F2 > XeO4 > XeOF4 > XeF4 > XeO2F2 > XeF3 > XeO3}$. How to justify this order? My ...
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1answer
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Reaction of hydrogen peroxide with sodium carbonate [closed]

In my book the following acid base reaction is written: $$\ce{H2O2 + Na2CO3 -> Na2O2 + H2O + CO2}$$ But I found that the $\mathrm{p}K_\mathrm{a}$ value of $\ce{H2CO3}$ is less than the one for $\...
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1answer
81 views

Does sanding the oxide layer of a magnesium sample break bonds?

We all know that if we keep a piece of magnesium metal exposed in open air, an oxide layer forms on it. This layer prevents further oxidation of the bulk metal. If we then rub it with sand paper, the ...
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1answer
150 views

Why is acetate a monodentate ligand?

Why is the acetate ion considered a monodentate ligand as opposed to a bidentate ligand considering both oxygen atoms can donate their respective lone pair of electrons?
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1answer
69 views

Naming of [Pt(py)4][PtCl4]

Why is $\ce{[Pt(py)4][PtCl4]}$ called tetrakis(pyridine)platinum(II) tetrachloridoplatinate(II) and not tetrapyridineplatinum(II) tetrachloridoplatinate(II)? I thought you use tetrakis for ligands ...
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1answer
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What is the state of aggregation of iodine formed during electrolysis of molten nickel(II) iodide? [closed]

Assume the electrolysis of molten $\ce{NiI2(l)}$ (inert electrodes) in a cell. The cell with a heating element is in the room; the room is at $\pu{25 °C}$ and $\pu{101.3 kPa}.$ The half-reaction for ...
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3answers
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Why is anhydrous copper(II) sulfate white while the pentahydrate is blue, even though both have one unpaired electron?

We all know that $\ce{CuSO4.5H2O}$ is blue and it turns to $\ce{CuSO4}$ on heating which is white. I also learnt about coordination complexes and d–d transitions and how transition metal compounds are ...
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2answers
66 views

How to calculate mass of calcium fluoride that will dissolve in sodium fluoride solution?

The solubility product of calcium fluoride, $\ce{CaF2},$ is $\pu{1.46E-10 mol^3 dm^{-9}.}$ What mass of calcium fluoride will dissolve in $\pu{500 cm^3}$ of $\pu{0.10 mol dm^{-3}}$ sodium ...
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1answer
44 views

Why does nitrous oxide react with bases and it is still a neutral oxide? [closed]

I have studied that N2O is a neutral oxide in my textbook(recommended by the central board of secondary education INDIA(country)). on internet and in my class notes i find its balanced reaction with ...
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0answers
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Why percent concentration in this example is equal 5.07%? [closed]

I got problem with this one: 0.6 g of sodium was added to $20cm^{3}$ of water. Calculate percent concentration of this solution. Answer: Cp is equal 5.07% Could someone tell me how it is possible? ...
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1answer
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What is the reason for the different solubility of silver halides in ammonia?

According to my knowledge, I know that $\ce{AgCl}$ dissolves in dilute ammonia, $\ce{AgBr}$ dissolves in concentrated ammonia and $\ce{AgI}$ does not dissolve even with concentrated ammonia. What is ...
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1answer
52 views

Qualitative Analysis- Distinguishing between two ions or two salts [duplicate]

I know my question is going to be quite below the level of this site but I am 1st grade in university and I can't understand anything. I am going to give an example from the book: distinguish ...

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