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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Effect of electronegativity [on hold]

Explain the effect of electronegativity when the surrounding atom is the same with different central atom having lone pair,refer to the second point of effect of electronegativity in Blockquote JD ...
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Is my calculation of the mass needed correct?

So i synthesised a ligand today that I need to use tomorrow to make a catalyst, i was looking at the experimental procedure I am doing tomorrow and it states the molar quantities in mmol. I’ve always ...
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What determines how substances should be stored? [on hold]

(Що впливає на умови зберігання речовин) Some substances can be stored solely dissolved, others only pure. Give at least two fundamentally different examples of both organic and inorganic substances ...
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Why isn't Kw = ([H+][OH-]) / [H2O], when H2O is the reactant?

For the hypothetical reaction: $ A ⇌ B + C$ the equilibrium constant expression is written as $\ K= \frac{[B][C]}{[A]} $ So, why is $ K_w $ written as: $ K_w = [H^+][OH^-] $ I would expect: $ ...
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Electrophilic base / nucleophilic acid / basic electrophile / acidic nucleophile

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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Decomposition of Metal Nitrates

An entrance JEE Main & Advanced AIEEE 2003 exam question: Which one of the following nitrates will leave behind a metal on strong heating? A. Copper nitrate B. Manganese nitrate C. ...
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Use of cryolite and fluorspar in electrolytic reduction of pure alumina by Hall-Héroult process

Cryolite $\ce{(Na3AlF6)}$ and fluorspar $\ce{(CaF2)}$ are added to alumina to lower the temperature of the mixture from $\pu{2000 °C}$ to about $\pu{900 °C}$ and also to increase the conductance. But ...
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Back bonding in p block elements

Why is back bonding not possible beyond period 3? As in why only between 2nd period elements and 2nd and 3rd period elements?
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How to calculate the mass of magnesium necessary to produce a certain volume of hydrogen gas?

How many grams of magnesium metal are required to produce 44.8 liters of hydrogen gas at STP according to the chemical equation shown below? (Answer: $48.6~\mathrm{g}$) $$\ce{Mg(s) + 2 HCl(aq) -> ...
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Conditions for the reduction of dichromate by manganese(II) to chromium(III) [on hold]

The unbalanced redox reaction $$\ce{Mn^2+ + Cr2O7^2- -> Mn^3+ + Cr^3+}$$ occurs in what type of condition? (a) Acidic (b) Basic (c) Neutral (d) Indeterminable
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How to homogenise Calcium Chloride Dihydrate with Corn Starch Powder? [on hold]

How to homogenise Calcium Chloride Dihydrate (77%) with Corn Starch Powder? And then how to remove moisture in the mixture? What's reaction requires?
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Ionic lattice structure of copper (II) sulfate pentahydrate

I would like to ask about the structure of the $\ce {CuSO4*5H2O}$ solid. Recently, I have learnt that the colour of $\ce {CuSO4 * H2O}$, an intermediate in the thermal decomposition of the ...
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Finding molarity of hyposulfite solution used in titration

$\pu{0.1 g}$ of $\ce{KIO3}$ is treated with excess $\ce{KI}$ solution. The liberated iodine required $\pu{44 ml}$ of $x$ molar hypo solution. Calculate the value of $x$. I have used the equivalent ...
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275 views

Calcium ion and sulfate did not form precipitate

I was in the chemistry lab earlier this week. We were doing a qualitative experiment (no concentration given for any solution). I added an unknown solution that contains $\ce{Ba^2+},$ $\ce{Ca^2+},$ ...
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Why do F and N don't make a bond? [on hold]

The electronic Configuration of F has 2p5 in the end and N has 2p1 in the end. So N can give one of it's electron to F to aquire stability? Why dosen't this happen ?
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Why does the displacement reaction of zinc in copper(II) sulfate solution result in dark metallic copper?

It is commonly known that when zinc metal is placed in a solution of copper(II) sulfate, a displacement reaction occurs, and elemental copper is deposited onto the decomposing zinc metal. A practical ...
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Why does ammonia have a pKa of 32.5 at −33 °C?

According to Wikipedia, ammonia has a $\mathrm{p}K_\mathrm{a}$ of $32.5$ at $\pu{-33 °C}.$ Why does it say that? Is it a typo? Isn't anything above $12$ is a very strong base? And both bases and ...
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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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How can batteries reach equilibrium if the reactions are irreversible?

My book says that the batteries we have considered so far (Daniell cells) have a low life span because they reach equilibrium too quickly. In the next paragraph, it states they are also made by ...
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Why is lithium the most reducing alkali metal, and not caesium?

Caesium has a larger size, and the effective nuclear charge that the valence electron experiences will be far less compared to that of lithium's, right? But lithium is still considered the strongest ...
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Zinc evaporation/toxicity at room temperature [on hold]

I have a (slightly embarrassing) question regarding zinc powder. I have recently broken an old mercury thermometer, and read that I can handle the mercury with powdered zinc - so I've sprinkled some ...
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I don't understand how hydration enthalpy is working for Cu+2 and Ni+2 [on hold]

Even though Ni+2 has same hydration enthalpy as Cu+2 still Cu+2 has +reduction potential whereas Ni has negative
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Can sodium silicate be made insoluble?

In this question, the user asked about curing sodium silicate with calcium chloride. My question is, will the resultant product be insoluble in water? I know calcium silicate is only very slightly ...
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Based on chemistry p lock anser it? [on hold]

On heating lead{2} nitrite gives a brown gas A . the gas A on cooling changes to colourless B solid. B on heating with NO chanes into bluesolid C.identify it A,B,C AND DRAW
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What is the mass of ozone present in 10.6 g of Na2CO3? [on hold]

I got a question in my textbook asking for the mass of oxygen present in 10.6 grams of $\ce{Na2CO3}$. Why are they asking about the mass of oxygen? Does this refer to $\ce{O2}$? Shouldn't it be the ...
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What is the identity of the unknown? [on hold]

I have calculated that the mass of the unknown is 2.02g. The mass of Epsom salt initially present in the unknown is 0.724g. The percentage of Epsom Salt in the unknown is 35.84%. The chemical formula ...
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Why does the dipole moment order of group 15 hydrides increase down the group?

The order given in my book is $$\ce{NH3} > \ce{SbH3} > \ce{AsH3} > \ce{PH3}$$ Phosphorous is more electronegative than arsenic and antimony. Then shouldn't the dipole moment be more in ...
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Why is Cu+1 less stable than Cu+2? Shouldn't it be the other way around? [duplicate]

After all in +1 state all the d orbitals degenerates are completely filled but in +2 only 4 degenerates are paired, there is an unpaired electron.
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Bond dissociation energy order for C−C, N−N, O−O and F−F single bonds

Data from Chemistry LibreTexts — Strength of Covalent Bonds, Table 8.8.1: Average Bond Energies (kJ/mol) for Commonly Encountered Bonds at 273 K: $$ \begin{array}{cr} \hline \text{Bond} & D/\pu{...
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For the purposes of auto racing, I am a Nascar driver trying to design a solution for heat exposure [closed]

Question, is it possible to pump liquid through some type of specially designed cool shirt without fluid coming in and out of the shirt, but rather just circulating and cause a chemical reaction to ...
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Distinguishing between octahedral and tetrahedral holes

I know the question sounds a bit silly and there are many similar answered questions but my 3D visualization (imagination) is very bad. There are some images of octahedral and tetrahedral holes but ...
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Can I get a sulfur colloid by mixing H₂S with H₂SO₃ in water? [on hold]

I want to make a colloid that shows rayleigh scattering so the light that passes through is orange but it seems blue
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1answer
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Formation of green precipitation whilst adding potassium fluoride to aqueous solution of copper(II) sulfate [closed]

Aqueous copper sulfate solution (blue) gives a green precipitation with aqueous potassium fluoride. Explain these experimental results. I've read answers like, $\ce{H2O}$ is a weak ligand and ...
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Mechanism of redox reaction between sulfur and nitric acid [closed]

Can someone describe the mechanism for the reaction between sulfur and concentrated nitric acid?
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Solution of metals in liquid ammonia [duplicate]

What is the colour of the solution obtained by dissolving alkaline earth metals in liquid ammonia ? Some sources (like jd lee) says it is bright blue but some other say black blue. I know it is blue ...
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Is there a selective wet etch of Bi2O3 Bismuth Oxide?

I'm looking for a wet etch of Bismuth Oxide that does not etch $\ce{Bi}$ itself. There are obviously chemicals that etch $\ce{Bi2O3}$, but $\ce{Bi}$ is pretty fragile, so almost everything I've found ...
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1answer
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How to produce Calcium Chloride Desiccant for Ocean Container

I want to produce Calcium Chloride container Desiccant for Food and Textiles related items. I have this specs of Calcium Chloride and i have PP Non Woven Bags for its packaging. I want to know just ...
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Reactivity of boron towards acids

Boron is a non-metal, i.e. it accepts electrons and acids donate electrons, so boron should react with acid but it doesn't. Why?
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Can a universal indicator turn colorless?

I learned that litmus paper could be bleached by chlorine to turn colorless. I’m wondering if any chemical substances can react with all the components of a universal indicator such that it turns ...
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What is the purpose of phase matching when drawing a MO diagram?

During the lecture, we were learning how to draw the MO diagram for $\mathrm{BF_3}$. I understand that only orbitals with the same symmetry labels can interact and form molecular orbitals. My ...
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How is the triferric tetroxide of iron possible?

If oxygen has a valency of $-2$, $4$ of it would result in $-8$. But iron doesn't have a (variable) valency of anything that goes to $-8$. Then how is $\ce{Fe3O4}$ possible?
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What is exactly Ortho and para hydrogen? [closed]

It is said that fundamental particles only have intrinsic angular momentum. If the nucleus actually don't spin then what exactly is Ortho and para hydrogen?
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Concentrating sulfuric acid

Since calcium oxalate is 3000 times less soluble than calcium sulfate, would it be possible to concentrate sulfuric acid from let's say 50% solution using following steps? : adding calcium carbonate ...
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What is the meaning of “Semi-coherent”,“incoherent” and “coherent” precipitate? [closed]

This is with regard to the phenomenon called precipitation hardening of age hardening in Al-Cu alloys particularly with regard to low Al concentrations.What I do not understand is how are precipitates ...
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How much time does sulfur dioxide take to oxidize to trioxide in air?

I saw that $\ce{NO2}$ is oxidized really fast, but if I put $\ce{SO2}$ in a jar with air at STP, will it take hours, days or years to react into $\ce{SO3}?$
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Mechanism for reaction between aluminium and iodine [closed]

What should be a suitable mechanism for the reaction between aluminium and iodine, catalysed by water? In my initial approaches, I had first thought of repeated attacks of the lone pairs of oxygen in ...
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1answer
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Which is more acidic HOF or HOCl?

My attempt to the question: We know that more polar the $\ce{O-H}$ bond, the more acidic is the compound. According to electronegativity, the $\ce{O-H}$ bond of $\ce{HOF}$ should be more polar than $\...