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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92 views

How can iodine oxidise hydrogen peroxide?

The following is mentioned in NCERT (government textbook in India used in all schools) under chemical properties of $\ce{H2O2}:$ (iv) Reducing action in basic medium $$\ce{I2 + H2O2 + 2 OH- -&...
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Why does the colour of the same compound (e.g. magnesium nitride) differ?

When I am searching the colour of $\ce{Mg3N2}$ I came across photos showing different colours: greenish-yellow on Wikimedia, and some other just yellow on some Google Images results. I am eager to ...
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Rules to identify the most stable resonance structures

While studying resonance from this Chemistry LibreTexts article, I found the rules to follow in order to decide which structure is the most stable. Among them: The structure with the least number of ...
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Competing half reactions in electrolysis of aqueous solution of sodium hydroxide

If you run a direct current using pure nickel electrodes through a solution of NaOH in distilled water, you will separate the water into hydrogen and oxygen. Are there any other reactions that could ...
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How does ammonium chloride increase the solubility of magnesium hydroxide in water?

In my textbook it is written that $\ce{Mg(OH)2}$ is slightly soluble in water, and it forms a milky solution which is called "milk of magnesia". Its solubility can be increased by the addition of $\...
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Synthesis methods of inorganic materials

On our exams we are asked to determine which synthesis method is best suited for a given compound. We have discussed direct synthesis methods such as high temp. and ampull, and indirect synthesis ...
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When aluminium is ignited in atmosphere, will it form only aluminium oxide or also aluminium nitride?

We know when lithium is burnt in air, it forms lithium nitride and lithium oxide. I am wondering if this applies to aluminium (other metals) also?
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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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Obtaining mercury from mercury(II) nitrate

I was thinking about obtaining mercury from mercury(II) nitrate. Is it possible? I've tried putting chunks of Fe into it, I've got the logic from the voltaic table (where Fe is on the left side of Hg, ...
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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 ...
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What are the properties of COₓ where x ≥ 3?

$\ce{CO_x}$ are part of the oxocarbon molecule class. Commonly known are $\ce{CO}$ and $\ce{CO2}.$ However, there are molecules in which $x$ is equal to or larger than $3.$ Those molecules are barely ...
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Determining a molecular formula of the catalyst for polymerisation of butadiene

I've got the following question in a workbook which I need to solve: A $\pu{50 g}$ sample of an experimental catalyst used in the polymerisation of butadiene is made up of $\pu{11.65 g}$ of $\ce{Co}...
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NMR of a bridging Methyl complex

I was provided with the following structure of an inorganic metal complex: And asked to give information on its NMR spectrum shown below The highfield signal is caused by a singlet with Platinum ($I ...
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Where does the energy required for excitation of electrons in hybridization come from?

We're commonly taught that when atoms want to hybridize in for instance methane, an electron is excited from $2s$ to $2p$ to allow for four unpaired electrons, which is necessary for bonding. Where ...
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Lead(II) oxide CRT monitor extraction

I have a large CRT monitor that, by the weight of the monitor, I estimate to contain over two pounds of lead. I want to know if the lead oxide is a mixture with the glass, or if it is chemically ...
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How to compare the boiling point of water, ammonia and hydrogen fluoride?

According to the values of boiling points that I found on internet the order is as follows: $\ce{H2O}$ > $\ce{HF}$ > $\ce{NH3}$ I was expecting $\ce{HF}$ to have highest boiling point because F ...
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Second ionization energies of copper(Cu) and silver(Ag)

The ionization energies of copper and silver are First ionization energy: Cu-745.5 kJ/mol Ag-731.0 kJ/mol Second ionization energy: Cu-1958 kJ/mol Ag-2073 kJ/mol Now, looking at the ...
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What happens when you run house electricity through salt water?

What happens when you run house electricity (120VAC) through salt water? (with standard copper wires!) Well, in https://youtu.be/dcrY59nGxBg , an interesting experiment was conducted to find out! At ...
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Why is the vanadium(3+) ion paramagnetic?

I know that the electron configuration of vanadium is $[\ce{Ar}]\mathrm{4s^2 3d^3}$. None of the electrons in the 3d subshell are paired. Once it loses these three electrons, shouldn't the remainder ...
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Problem with synthesis of calcium formate

I just tried preparing calcium formate by adding $\ce{Ca(OH)2}$ to ammonium formate, but I observed no bubble formation and no smell of ammonia. Why doesn't calcium hydroxide, being a strong base, ...
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Oxidation state of Manganese [closed]

We know that Mn shows variable oxidation states ranging from +2 to +7 but why is +1 oxidation state of Manganese(Mn) not stable? The +1 oxidation state of Mn would have a configuration of 4s1 3d5. ...
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Acidic nature of boric acid when its concentration high

Following statement was given for boric acid $(\ce{H3BO3}):$ At low concentrations $(\leq\pu{0.02 M})$ essentially $\ce{B(OH)3}$ and $\ce{B(OH)4-}$ are present, but at higher concentration the ...
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Structure of crystalline boron trioxide

I recently came across the statement The structure of crystalline $\ce{B2O3}$ consists of $\ce{BO4}$ tetrahedra, two sets of which form two types of interconnected spiral chains, three $\ce{B-O}$ ...
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Can Silicon be used as anode for Li-Ion batteries

Can Si be used as anode. I assume you could store much more energy in Si since the atom is much larger than C, but then Si seems not to like to bond with itself. Can there be a solution?
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Why is the Si-F bond one of the strongest single covalent bonds of them all?

I honestly have no clue where to begin explaining why the Si-F bond is one of the strongest single covalent bonds of them all. I would actually predict the bond to be relatively weak on account of ...
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Is there any difference between medical and cleaning ozone?

What are the main differences between medical ozone (auto-hemotherapy, …) and cleaning ozone (for example, the kitchen cleaning devices for vegetables and food). I noticed that they can produce a ...
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78 views

Why doesn't H₄CO₄ exist as a stable compound? [closed]

Why doesn't $\ce{H4CO4}$ exist as a relatively stable compound? Its heavier homologue $\ce{H4SiO4}$ seems to exist although it is unstable to some extent but new methods have been able to stabilise ...
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Optical activity of cis-trans isomers of a co-ordination compound [closed]

Why do geometrical (cis and trans) isomers of [Pt(NH3)(Br)(Cl)(py)] not show optical activity ? Thanks In Advance...
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Why is the Sulphur Dioxide molecule polar? [closed]

I am in 12th standard and was revising the concept of determining which polyatomic molecule can be polar and which can be non polar. So when this example was given we were told that vertical dipole ...
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How to measure saturated salinity and mineral levels for flaked sea salt?

I am a sea salt enthusiast looking to make the perfect flakey sea salt. I start with sea water and boil it down to a thick brine. Then with less heat I reduce the brine more slowly and inverted salt ...
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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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Exceptional electromagnetic properties of lanthanide series elements

Why do so many lanthanide series elements have exceptional electromagnetic properties? They can form strong magnets and are also used in superconducting applications. The number of elements in the ...
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Reference request on potassium cyanide production method

I kindly ask for a reference for the following claim about potassium cyanide, found at potassium.atomistry.com: It is also obtained by the action of a mixture of steam and nitrogen on potassium ...
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What is the relation between volume strength and normality of H2O2? [closed]

I have been told that: $$\text{equivalent weight of }\ce{H2O2} =\text{molecular weight of } \ce{H2O2}$$ as it's $n$-factor is $1$ (from balanced equation). But in my book it's given that: ...
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Role of phosphoric acid in redox titrations

For redox titrations of $\ce{Fe^2+}$ versus $\ce{KMnO_4}$ or versus $\ce{K_2Cr_2O_7}$ , role of phosphoric acid is quite unclear to me. In dichromometric titration, $\ce{H_3PO_4}$ complexes $\ce{Fe^3+...
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Ion exchange resins

My problem is explained quite easily: I have no experience with ion exchange resins but I would like to test something out in order to exchange my sulfate ions in solution for nitrate (can also be ...
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Calculation of CFSE

I need to find CFSE for these: $\ce{[Ti(H2O)6]^3+}.$ $\ce{Ti}$ is $\mathrm{(4s)^2(3d)^2}$, $\ce{Ti^3+}$ is $\mathrm{(4s)^0(3d)^1}.$ Afterwards it becomes $\mathrm{d^4sp^2}$ or $\mathrm{t_{2g}^5e_g^4}$...
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Stability of cuprous iodide in aqueous solution

An aqueous solution of $\ce{Cu+}$ is usually unstable, but $\ce{CuI}$ is stable. Explain. $E^\circ(\ce{Cu^2+/Cu+}) = \pu{0.153 V}$ and $E^\circ(\ce{Cu+/Cu}) = \pu{0.521 V}.$ I found this question ...
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How do molecules with muons and electrons bond?

Is bonding specifically for and between electrons? Why cant two atoms share muons, which are different particles of same charge, spin and different mass? Why there aren't muon-electron bonds? Why is ...
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Lewis Acid / Base reaction for SO2 and H2O

I am having trouble with this question: Identify the Lewis acid and Lewis base in each of the following reactions: $\ce{SO2(g) + H2O(l) = H2SO3(aq)}$ What I tried: A Lewis acid is an electron pair ...
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How does sodium borate (Borax) function to promote Fe-Fe bonding?

Borax is used as "flux" during metal forging to help stick two pieces of steel together. I am curious what is happening at the atomic level. How does the addition of borax promote Fe-Fe bond formation?...
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How do carbon content and various heat treatment cycles affect the properties of steel at the micro-level?

I watch a YouTube channel by Alec Steele where a lot of metal forging is done. From this I know that varying the carbon content in steel drastically alters the physical properties of the metal, as ...
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Create Sodium Hydroxide from Sodium Silicate

During a reaction I use sodium hydroxide and create sodium silicate as a by-product. I am curious if there is a way to recycle that sodium silicate into sodium hydroxide? I am not a chemist, just ...
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Examples of Lewis base nature of sulfur dioxide

I have read that sulfur dioxide acts as both Lewis base (due to presence of lone pair over $\ce{S}$ and/or $\ce{O})$ and Lewis acid (due to presence of vacant d orbital). I found many examples of $\ce{...
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Finding the concentration of each ion in saturated solution of lead(II) hydroxide

Question If the solubility of $\ce{Pb(OH)2}$ is $\pu{0.155 g/L},$ then the concentration of each ion in a saturated solution of $\ce{Pb(OH)2}$ is A. $[\ce{Pb^2+}] = \pu{0.155 g/L}$ and $[\ce{...
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What is the logic behind the division into groups of anions and cations in qualitative inorganic analysis? [closed]

I find it very confusing and hard to memorize. Is there a way to deduce it, like understanding how it is derived, or is it just one of a lot of ways you can do it but is the standard one? Do people ...
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Why are palladium and platinum carbonyls unstable at room temperature?

By palladium and platinum carbonyls, I mean the mononuclear, homoleptic, charge-neutral, binary carbonyl complexes of the form $\ce{M(CO)_n}$ and not any heteroleptic complexes like $\ce{Pd(CO)(PPh3)3}...
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Copper (II) chloride reduction with Hydrogen gas

I've been looking into making pure copper (I) chloride, but using ascorbic acid is relatively expensive for me. I'd also like to avoid having water in any part of the synthesis to minimize the ...
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Petroleum Benzine or Normal-Hexane for removing a silicone based adhesive?

I’m trying to remove the glass panel wich is glued to the polarizer of an LCD display (an Apple iMac display with broken glass but working LCD wich I would like to repurpose). It seems to be fixed ...
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Calculating pH of rain water

The concentration of $\ce{SO2}$ in the atmosphere over a city on a certain day is $\pu{10 ppm}$. Given that solubility of $\ce{SO2}$ in water is $\pu{1.3653 mol L-1}$ and $\mathrm{p}K_\mathrm{a}$ of $\...