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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Indicator for H2S [closed]

In there an indicator for sulfur compounds like H2S (also organic)? Or some straight forward way to measure if the H2S concentration in the air is higher than usual? Or is the concentration too low ...
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493 views

Balancing the equation

I've got a question: $$\ce{Cr2O7^2- -> Cr^3+}$$ This reaction takes place in a acidic medium - how many $\ce{H+}$ are required to balance the equation? How do I balance this reaction. Cr had ...
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Why is the answer specifically OH-? [closed]

When solid A is added to water, some dissolves to form a colourless solution. When phenolphthalein is added to this mixture, it turns pink. When dilute hydrochloric acid is added to the ...
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What's the structure of “inorganic benzene”? [closed]

Can anyone give me a possible structure for a compound called "inorganic benzene"?
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55 views

Drawing bicarbonate ion in different way [closed]

I don't know why can't I draw $\ce{[HCO3]-}$ like that: I tried to draw it like that and checked everything. I checked formal charge and all was good. Why they draw it OH I know its also alright but ...
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1answer
42 views

Does oxyhydrogen require the presence of water to ignite?

I recently read a short story (fiction) where a major plot element was based on the expectation that a mixture of oxygen and hydrogen will not ignite unless some amount of water is present to get the ...
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Why is HCN not a Base and why does HNC does not dimerise?

We know that species that have a lone pair of electrons are Lewis bases (like ammonia). The structue of $\ce{HCN}$ is $\ce{H-C#{N:}}$; nitrogen has a lone pair of electrons and it is still acidic. Why?...
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36 views

Safety requirements for the laboratory work with salts of heavy metals [closed]

So I am going to start a set of experiments involving the following metal nitrates: Cobalt nitrate hexahydrate Barium nitrate Cerium nitrate hexahydrate Ammonium nitrate nonahydrate Iron(II) nitrate ...
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3answers
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Why is CO2 + Ca(OH)2 an acid-base reaction? [closed]

$\ce{CO_2 + Ca(OH)_2 -> CaCO_3 + H_2O}$ I was wondering why the reaction between carbon dioxide and calcium hydroxide is considered an acid-base reaction when there are no hydrogens which are ...
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1answer
51 views

Does bicarbonation require water?

In an aqueous solution of $\ce{NaOH}$ exposed to the atmosphere one can probably expect some degree of $$\ce{NaOH(aq) + CO2(g) -> NaHCO3 (aq)}$$ But, what would happen if just a solid block of $\...
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I smelled an organic chemical in a lab. (Hexamethylenediamine) Will it cause brain damage? [closed]

Our teacher told us to keep a distance while smelling organic chemicals. I forgot and smelled from the opening of the tiny container. Can this substance be corrosive and may that have neurological ...
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402 views

Why does hydrolysis of OF2 give a neutral solution?

I found this equation on the internet for the hydrolysis of $\ce{OF2}$: $\ce{OF2 + H2O -> HF + O2}$. So, according to me, $\ce{HF}$ must make generate an acidic instead of neutral solution. But ...
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61 views

What are the following equations called?

Our teacher was writing out the following ways of expressing redox and she used a particular term for what these equations are called. When we write out the following what is this called? Its a way to ...
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1answer
47 views

Are nitrogen oxides always radicals?

Some reactions between nitrogen oxides and ozone can be the following: $$NO\cdot(g) + O_3(g) \rightarrow NO_2\cdot(g)+O_2(g)$$ $$NO_2\cdot(g) + O\cdot(g) \rightarrow NO\cdot(g)+O_2(g)$$ Where the $...
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How many hydrogen bonds are formed by water and by HF?

How many hydrogen bonds are possible for $\ce{H2O}$, given that oxygen has two lone pairs? Is it 4 or 2? Related: why is it that HF forms only 1 hydrogen bond, given that HF has three lone pairs?
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133 views

Help regarding stereochemically inactive s orbital [duplicate]

Author JD Lee says in his book, Inorganic Chemistry The dipole moment of $\ce{XeF6}$ is approximately = $0$ because the lone pair is present in the stereochemically inactive s orbital. What is ...
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1answer
608 views

Beryllium hydride violates the octet rule [duplicate]

Beryllium hydride does not obey the octet rule. Isn't this impossible, unless there are more elements comprising the molecule?
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1answer
156 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 $\ce{{Au}^{3+}}$.
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Why is iron pentacarbonyl known, but iron(III) hexacarbonyl is not?

Why is the neutral complex $\ce{[Fe(CO)5]}$ known, but the cationic carbonyl complex $\ce{[Fe(CO)6]^3+}$ is not known?
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2answers
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What is the relation between solubility and thermal stability? [closed]

The thermal stability of alkaline earth metals increases down the group for hydroxides i-e., Be(OH)2 is less stable than Ba(OH)2. The solubility also increases down the group for these compounds i-e., ...
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1answer
46 views

Do all nitrides(metal nitrides,non metal nitrides) react with water? [closed]

It is observed if we put magnesium nitride in water it will react and produce ammonia gas and magnesium hydroxide solution, do all nitrides behave this way? Is there a trend?
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Can compounds dissolved in different miscible solvents react?

For example, can crystal iodine dissolved in ethanol react with sodium thiosulfate dissolved in water when mixed together?
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42 views

What ratio of bicarb to sugarcane juice with a pH level of 4.5-5.5 to neutralize pH level? [closed]

I am thinking of adding baking soda to sugarcane juice to eliminate the fruity acid that is present. The pH of sugarcane juice ranges from 4.5-5.5. I wonder how much baking soda should I incorporate ...
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1answer
47 views

How to predict whether a salt will act as an acid or as a base in aqueous medium? [closed]

How to would we know if a salt such as $\ce{CO_2}$ reacts acidic or basic in water. The explanation I see everywhere is that you have to see the acid and base that makes up the salt, in the case of $\...
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Reaction of coloured metal complexes with water and sulfuric acid [closed]

Reaction of coloured metal complexes with water and sulfuric acid I recently started researching the coloured compounds made from transition metals focusing on one with oxidation state II, so Mn,Fe,...
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2answers
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Is this balanced redox equation correct? [closed]

I'm trying to balance an equation using oxidation numbers $\ce{MnO4^- + H+ + Cl- -> Mn^2+ + Cl2 + H2O}$ my suggestion: $\ce{MnO4- + 8H+ + 5Cl- → Mn^2+ + 2.5Cl2 + 4H2O}$ the 2.5 $\ce{Cl2}$ is ...
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2answers
297 views

T-shaped and Seesaw geometry hybridization

Why are the filled orbitals s and px (in the T-shaped case) also part of the hybrid orbitals of the central atom in sp3d hybridization? In other words, why should the hybrid orbital not be a p3d, for ...
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1answer
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Extraction of metals using electrolysis

I came across a question that goes as: The electrolytic method of reduction is employed for the preparation of metals that are: Less electropositive Moderately electropositive Highly ...
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Is there any obvious relation between sodium bicarbonate and ammonia; (how) can sodium bicarbonate be involved in producing ammonia?

Using sodium bicarbonate as a deodorant sometimes can produce a strong ammonia smell. Is there some obvious chemical explanation for this?
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How to find the bond order in delocalized pi bonding of more than two atoms? [duplicate]

J.D Lee has written down some rules for calculating the bond order. I have no difficulty following step 1 and 2. It's easier to work with an example so I'll highlight my issues with step 3 , 4 ...
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2answers
486 views

Does titanium(II) oxide conduct electricity? [duplicate]

In my book, it is given that $\ce{TiO(s)}$ is an electrical conductor. But I'd think that since $\ce{TiO(s)}$ is ionic and in solid state, it shouldn't conduct electricity. So, why does it conduct ...
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What are the molar and mass concentrations of 18% HCl? [closed]

A solution of hydrochloric acid of mass fraction $\pu{18.0\%}$ has a density of $\pu{1.0878 g cm-3}$. What are the molar and mass concentrations of this solution? I got $\pu{5.37e-3}$ and $\pu{195.8}$...
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Should I include water of crystallisation in the product of a precipitation reaction with silver nitrate?

I've deduced that a certain compound has an ionization isomerism. I just want to know which of the following reactions is correct. I think this one is the more likely: $$\ce{[Cr(H2O)5Cl]Cl2 \cdot ...
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How would we know if an interhalogen compound would be a gas/liquid at a particular temperature? [closed]

Ex- how can we understand that ClF is a gas @ 298K? Is there some logic behind it? Please explain.
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How does barium chloride identify sulfate ions?

What is it about barium chloride specifically that makes it able to form a precipitate with sulfate ions. What is the chemistry behind this?
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How to separate two aqueous salts?

I have a mixture of two aqueous salts, $\ce{Cr(OH)3}$ and $\ce{NaNO3}$ and I'd like to separate them and purify the $\ce{Cr(OH)3}$ in order to make $\ce{KCr(SO4)12 . H2O}$ (Chromium Alum). Does any ...
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1answer
923 views

How to state something as strong or weak oxidising agents?

It is said that conc. $\ce{H2SO4}$ is a strong oxidising agent. Why is it regarded as strong? In case of acids, we say something that fully ionizes in an aqueous solution is a strong acid. But what ...
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287 views

How is square planar geometry possible in metal complexes?

I came across this statement and I don't understand what it meant by it: "Square planar geometry is favoured by ligands that can form pi bonds by accepting electrons from metal atoms or ions." How ...
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1answer
92 views

The second Ionisation energy of the Zn, Cd, and Hg follows the order?

It is observed that the order of second ionisation energy of these three elements is Zn > Cd < Hg. Why is there an anomaly in the observation?
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2answers
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Why does SiH4 have unusually large bond angles?

The bond angles of $n > 2$ hydrides are usually around $90^\circ$, such as $\ce{PH3, H2S},$ $\ce{H2Se},$ $\ce{H2Te}.$ I understand that this is from increased $\mathrm{p}$ character in the bonding ...
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1answer
35 views

Does hydrogen sulfide gas readily react with air? [closed]

I have heard that hydrogen sulfide is explosive in air, I saw YouTube videos that the hydrogen sulfide gas out flowing from Kipp's apparatus is ignited by a burner. Does hydrogen sulfide only reacts ...
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1answer
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Difference between neutral and amphoteric oxides

What is actual difference between neutral oxides (e.g. $\ce{NO},$ $\ce{N2O},$ $\ce{CO})$ and amphoteric oxides (e.g. $\ce{Al2O3})?$ I got a hint of it from the comment of Ivan Neretin.
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Confused on how to draw cis-[Ni(H2O)4(NH3)2]Cl2 [closed]

I got a question on my practice exam telling me to draw cis-diamminetetraaquanickel(II) chloride, but I'm not sure on how to place the two $\ce{Cl}$ atoms.
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1answer
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Electrophilic base / nucleophilic acid / basic electrophile / acidic nucleophile [closed]

What I was understanding is that all bases are nucleophiles and acids are electrophiles means the condition for them is same and all nucleophiles are basic and all bases are nucleophiles and same for ...
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Question About Reversible Reactions and Batteries

So my book says that the batteries we have considered so far( Daniell cells) are low life span, because they reach equilibrium too fast. In the next paragraph, it says they are also made by ...
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1answer
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How can I prepare two phosphate buffer of different concentrations but give same pH? [closed]

How is it that buffers of different compositions can have the same pH? For example, it is possible to prepare 0.01 M phosphate buffer of pH 7.0 and 0.1 M phosphate buffer of pH 7.0? How? I used ...
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1answer
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Why anhydrous copper sulphate is acidic in nature but pentahydrate copper sulphate is amphoteric? [closed]

$\ce{CuSO4}$ is acidic salt because it is made up of $\ce{Cu(OH)2}$ (weak base) and $\ce{H2SO4}$ (strong acid). But why $\ce{[CuSO4.4H2O]H2O}$ is amphoteric?
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1answer
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How could I prepare Iron(III) arsenate (FeAsO4)?

I have no idea in which conditions this compound is formed and would like to find out any / different ways it can be prepared (any easy way not requiring expensive equipment would be great).
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2answers
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Chemical reaction

Consider the following Ca(OH)2 + 2NH4Cl → CaCl2 + 2NH3 + 2H2O (Source: https://chemiday.com/en/reaction/3-1-0-440) It appears to be double displacement reaction as CaCl2 is formed, but it’s not as ...
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2answers
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Why can't a weaker acid protonate the conjugate base of a stronger acid?

So I've heard that, supposedly, a weaker acid cannot protonate the conjugate base of a stronger acid to give that stronger acid. For instance, adding ethanoic acid to sodium sulphate will not result ...