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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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How to identify whether a metal carbonate is basic or not? [on hold]

Magnesium carbonate is basic, but why isn't lithium carbonate also basic? And how does one determine whether a carbonate is basic or not?
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1answer
31 views

Why is the combustion of Nitrogen endothermic? [on hold]

Other combustion reactions are exothermic but this combustion reaction endothermic. Why ? Please explain..
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15 views

Half-reaction for ammonium nitrate comproportionation into dinitrogen monoxide.

Ammonium nitrate comproportionates into dinitrogen monoxide in the following reaction: $\ce{NH4+ (aq) + NO3- (aq) -> N2O(g) + 2H2O (l)}$ I attempted to write the half-reactions by calculating ...
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How Air to Burn a Can of Diethylene Glycol? [on hold]

I have a can of diethylene glycol that will burn complete in 6 hours. How much air (with 21% O2) will be required to burn all of the 7.41 fl. ounces of fuel?
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Can someone solve this problem? [closed]

4.2 grams of metallic bonding X-Mg (where X is a trivalent metal) reacts with HCl and 3.99 liters of H are released. Knowing that the percentage of Mg in the bond is 91.4% and N(number of neutrons) of ...
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Decomposition of dichlorofluorescein [duplicate]

Does dichlorofluorescein decompose when exposed to light at ambient temperatures? and if so, what are the expected decomposition products?
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21 views

how to clean copper solid from test tubes

copper (II) Bromide was transformed to Copper/ copper oxide in the test tubes using heat and Nitric acid. I want to clean the test tubes containing solid copper. What should I use to completely ...
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24 views

How to understand MO diagrams for cationic octahedral transition metal complexes

I am having problems understanding the construction of MO diagrams in octahedral transition metal complexes within ligand field theory (LFT) when the metal center is asumed as an cation: I am ...
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0answers
33 views

Why is the structure of ozone not an equilateral triangle? [duplicate]

In the structure of ozone, there is a double bond and a coordinate bond, which causes the accumulation of positive charge on the central oxygen due to sharing of the lone pair. Wouldn't a triangular ...
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20 views

Why is NaHCO3 polymeric while KHCO3 is dimeric? [duplicate]

To explain the higher solubility of $\ce{KHCO3}$ as compared to $\ce{NaHCO3}$, some textbooks point out that $\ce{KHCO3}$ is dimeric while $\ce{NaHCO3}$ is polymeric, but why is it so?
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32 views

What is symmetry of p- and d-orbitals in ${D_{3h}}$?

To identify IR and Raman active, symmetry of p- and d-orbitals are used. If we start since making ${D_{3h}}$ character table, how to match between symmetry of p- and d-orbitals and Mulliken symbol? ...
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1answer
13 views

Why is it important in the iodine clock reaction that there is only a small quantity of sodium thiosulfate?

These are 2 questions . Why is thiosulphate needed ? And why In small quantities ? I know that the thiosulphate reacts with the I2 to form I ions Why is that important though ?
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21 views

Chemical Stucture of Cu(asp)2(py)2? [closed]

Wondering if the aspirin ligand is bidentate or monodentate.
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32 views

Why does standard reduction potential get multiplied by the change in oxidation state and not by the number of electrons transferred?

The whole basis of Frost diagrams is to have a graphical representation of the Gibbs free energy of formation ($\Delta{G}_{f}$) of different oxidation states of an element using the proportional ...
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0answers
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Homogeneous catalysts are involved in the rxn and are then regenerate , what about heterogeneous catalysts? [on hold]

Are heterogeneous catalysts involved in the rxn they catalyse ? Do they react with the reactants ? An example of a heterogeneous catalyst being used is $\ce{V2O5}$ in the contact process.
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Is the reaction between ethanol and acidified potassium dichromate an example of an autocatalytic reaction? [on hold]

If excess $\ce{K2Cr2O7}$ was used , and the reaction mixture was heated under reflux, an acid is produced, does this acid help catalyse the reaction ?
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1answer
24 views

Calculating the standard reduction potential for the oxidation of water

I was working with Latimer and Frost diagrams for oxygen when I came across what seems to me a contradiction. From the Latimer diagram for oxygen below, we know the standard reduction potential for ...
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1answer
36 views

Why nitrogen monoxide does not dimerise [duplicate]

This question has already been asked link Why doesn't nitrogen monoxide dimerize? but explination is not clear. I would like it to be explained in simple manner using molecular orbital diagram ...
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0answers
15 views

how to more sticky ethanol jel ,like as candle strick? [closed]

pls all to yours,May I wish to know how to more strck the ethanol jel .i m alittle know about calcium acitate is to form the ethanol jel. Major is making more stricky the ehanol body . ( i m ...
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0answers
16 views

Solving for PPM Concentrations [closed]

What is the concentration of a solution, in parts per million, if .02mg of NaCl are dissolved in 1000g of solution?
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1answer
23 views

What is PPM in terms of air concentration?

When they say the $\ce{CO2}$ concentration is $\pu{350 ppm}$ what does this actually mean? Does this mean that if we took a sample of air say $\pu{1 m3}$ then $\pu{350 mg}$ of that cubic meter would ...
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1answer
46 views

Can the oxidation of hydrogen peroxide be reversed? [on hold]

Hydrogen peroxide is said to be unstable, for it undergoes auto-oxidation on standing/heating: $$\ce{2H_2O_2 -> 2H_2O + O_2}$$ where $\Delta S=\pu{70.5 J {mol}^{-1}K^{-1}}$ and $\Delta H^{\Theta} ...
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2answers
61 views

Is fluorine sp3 hybridized in BF3

Since BF3 has the shape of tetrahedral, and in the provided solution, Boron is sp2, why is Fluorine sp3 hybridized?
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27 views

What is DNA Concentration?

Watching The "Making a Murderer" documentary an analytical chemist claimed they found .14 nano grams per microliter on a car key. What exactly do they mean by stating it this way? Why wouldn't they ...
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1answer
21 views

What does 'a' stand for in 'a-C' according to research paper lingo?

I came across this paper but I cannot figure out what is a-C as it is not defined. The C here is obviously Carbon. Regarding 'a' prefix My best guess is that it stands for amorphous. Is this correct?
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Using thermodynamics to predict the acid-base character of fluoride ion in water

I was working through the end-of-chapter exercises of the acid-base chapter in Shriver's Inorganic Chemistry when I came across the following problem: 4.7. The effective proton affinity $\ce{A^{'}_{...
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0answers
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What explains the bond angles for hydrides of group 15? [duplicate]

I heard about drago rule. According to this there should be no hybridisation in ph3 onwards. But how should it be true and if it is true then from where we get idea about its shape? Does its ...
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1answer
42 views

Will gamma radiation cause “thermal” decomposition of sodium bicarbonate?

I am conducting research for a new drug that contains powdered sodium bicarbonate, and the drug will need to be sterilized after placement into it's container/closure system. Typically, this is ...
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1answer
28 views

HNO3 + F2 reaction

HNO3 is a strong oxidising agent and as well as F2 . What will be the reaction when pure F2 gas is bubbled through 100% pure HNO3. I Google it but all suggests different reaction.
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0answers
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Lead's affinity for oxygen in the cupellation refining process

My inorganic textbook says Cupellation is a process, where crude gold is taken in a small bowl called cupell and melted in the presence of air. Due to high oxygen affinity of Pb, it is converted to ...
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1answer
18 views

Dilution of Concentrated TiCl4 using deionized water [closed]

How can we dilute conc TiCl4 (>99%) to 20 % w/w, using only DI water?
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0answers
30 views

Dichlorine monoxide molecular geometry

I need to predict the geometry of Dichlorine monoxide, using the main link theory: Lewis model, VSEPR and hybridization of molecular orbitals. First, the Lewis structure is a graphical representation ...
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1answer
32 views

Why do large cations stabilise large anions and small cations stabilise small anions? [closed]

I see this trend from enthalpy change of decomposition data, though I struggle to find a decent explanation for why.
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What is a major product of this trans effect reaction?

In the association substitution of ligand into a complex, there is trans effect which describes where incoming ligand replaces leaving ligand. Most of examples in textbooks showed only 2 steps of ...
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1answer
27 views

Formulation and Nomenclature of Boric and Phosphoric Acids

Why are boric and phosphoric acids are formulated as: H3BO3 H3PO4 Instead of: HBO2 HPO3 Because the acids end with the -ic suffix, the valences of the elements between the hydrogens and oxygens ...
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0answers
42 views

Difference between Zirconium nitrate and Zirconyl nitrate

I found the following test for removal of phosphate radical from a given inorganic salt : The filtrate obtained after group II analysis (of basic radicals) is boiled to remove hydrogen sulphide gas....
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1answer
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Quantity of base needed to neutralise litre of 36% HCl?

Sorry for asking a basic chemistry question. I last did this kind of chemistry at school about 30 years ago and I don't have confidence that I'd get it right from first principles :) Short version: ...
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1answer
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Polyprotic acid - How does one calculate the CONCENTRATIONS of ALL species present in a solution when you start with 0.3M NaH2PO4? [duplicate]

Can anyone give me a push in the right direction, how do I calculate the concentration of all species present in a solution with 0.3M NaH2PO4. So the concentration of H3PO4, H2PO4 -, HPO4 2-, PO4 3- ...
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1answer
36 views

Second order Jahn-Teller effect for d0 complexes

I was wondering why the second order Jahn-Teller effect is also said to happen for many d0-systems? It makes sense to me that due to relativistic effects and the stabilization of the s-Orbital and ...
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1answer
24 views

Valence Electrons of Molecules

Why do we say that hydrogen has 1 valence electron? Hydrogen (H2) is a molecule so how does this make sense?
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1answer
65 views

Optical Isomerism in Coordination Compounds of type MA₂B₂(CC)

I was asked the following question: How many optical isomers are there for $\ce{[Cr(NH3)2Cl2(en)]^+}$ ? First of all I figured out the following four geometrical isomers of the above complex: Out ...
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0answers
27 views

what chemical causes Gold to change color permanently and become invaluable [duplicate]

Is there any chemical that causes gold to change color or become invaluable.
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1answer
38 views

Metals - Solids or Types of Atoms? [closed]

Are metals lattices of metal ions bound to delocalised electrons or are metals types of atoms? For instance we can say “metals are electronegative” and we can say “metals are conductors of electricity”...
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1answer
16 views

Maximum metal-metal distance for antiferromagnetic coupling

Imagine a transition metal complex with multiple open-shell transition metal cations. If the metals are relatively close in distance, it is possible that antiferromagnetic coupling will occur between ...
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0answers
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Chemical bonding and molecular structure [duplicate]

This is past year IIT question.MY QUESTION How to compare lattice energy among molecules belonging to different groups and periods? MY DOUBT IN THIS QUESTIONTo compare lattice energy we use coloumb's ...
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0answers
23 views

Alkali metals and oxygen react

Generally, the reported major products are lithium monoxide, sodium peroxide, and potassium, rubidium and caesium superoxides. But will the major product change, if the quantity of oxygen available to ...
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1answer
25 views

Substances - A Macroscopic Concept

Does the term “substance” refer to any sample of matter that is tangible? In other words is “substance” a macroscopic concept or can we also refer to individual particles such as atoms, molecules, etc....
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1answer
37 views

Inorganic Chemistry

Which of the following is a covalent bond? 1.Al2O3 2.AlF3 3.AlCl3 4.Al2(SO4)3 The correct answer is AlCl3.But I have a confusion between option c and d.A/c Fajan's ...
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6answers
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Why do we call O2 oxygen? [closed]

I have been taught that oxygen is a chemical element, in other words a certain type of atom that has 8 protons in its nucleus. So why is O2 called oxygen? It is not a type of atom but rather a ...
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2answers
102 views

Does carbon monoiodide (CI) exist?

Many of my students get chlorine $\ce{Cl}$, confused with carbon monoiodide $\ce{CI}$, despite my promises to use serif fonts whenever possible and to never give them carbon monoiodide in a question. ...