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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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Why is the Molar mass of CO2 different than the weight of the sum of its particles?

The Molar mass of CO2 is stated to be 44.009 grams per mol But in a calculation of the weight of each atom's particles((Electrons,Protons,Neutrons) times Avogadro's constant I get 44.36 grams per mol ...
physicsnewbie's user avatar
4 votes
2 answers
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What do bracketed plus-sign-notations such as (+M) or (+O2) next to reaction participants mean?

What does $(+M)$ means in the following reaction from Chua et al. [1]? $$\ce{NO2 + OH($+M$) -> HNO3($+M$)} \tag{R11}$$ It looks like $M$ could be a catalyst (maybe metal?), but usually catalysts ...
jackisquizzical's user avatar
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Related to chain forming compound like silica or sugar [closed]

If we talk about silica or even the sugar crystals then it is said that lets take silica example that is SiO2get combined in a chain and this chain forms polymers and all that. But when this SiO2 will ...
Neha Bharti 840's user avatar
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1 answer
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Effective nuclear charge increases along period despite increasing number of electrons

I learned that when an increasing number of electrons are present in the orbitals, then nuclear force decreases as it needs to hold more electrons. Given this, why does the effective nuclear charge ...
ADITYA KAR's user avatar
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What is the CFSE of [Fe(CN)6]4- (including pairing energy) [closed]

I just want to know what will be the coefficient of pairing energy in the CFSE formula of [Fe(CN)_6]^4- as there is also a paired e- initially in d orbital.
LaTalia69's user avatar
2 votes
2 answers
80 views

White powder-like substance on top of sodium hydroxide solution

i've made sodium hydroxide solution adding 100g of hydroxide to water 100g. i've been adding it slowly and constantly stirring. few days later on top of solution was thick layer of white powder. it ...
2 votes
0 answers
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How to Prepare Vanadium (Na3VO4) solutions buffered at pH = 7.5?

"I need to conduct adsorption studies on Vanadium using various substances like biochars and nanooxides. To prepare Vanadium solutions up to 320 ppm with a pH buffered at 7.5 using PIPES buffer, ...
DILEEP SINGH's user avatar
1 vote
1 answer
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Converting cif file with powdll, plotting cif file in excel

When I press convert in powdll converter software, I get this error message "Object reference not set to an instance of an object". I haven't been able to convert any kind of file type ...
Astro's user avatar
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Sodium zincate reaction

does adding zinc chloride into the solution of sodium zincate formed by the reaction of zinc chloride and excess of sodium hydroxide form the precipitate of zinc hydroxide ? I mean does sodium zincate ...
Vijendra's user avatar
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Why is silicon dioxide a network solid while sulfur dioxide is a molecular gas

In my understanding sulfur dioxide’s Lewis structure has one lone pair on the centre atom (sulfur) with one pi bond to each oxygen atom, while silicon cannot form these silicon-oxygen pi bonds. Both ...
Dale Yang's user avatar
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Boric Acid to Boric Acid Flakes? [duplicate]

I have 10 grams of boric acid, how can I recrystallise it to flakes? I have 0 chemistry knowledge
Mrlocal's user avatar
-2 votes
1 answer
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Are homoatomic molecules like ozone, graphite, diamond considered as elements [closed]

While researching I have found two definitions for element. First, elements are pure substances that consist only one type of atoms. According to this O2, O3, Diamond and in short all allotropes are ...
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1 vote
1 answer
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Mechanism of Zn + NaOH?

I was reading block chemistry in class, and I was taught by my chemistry professor this method of preparation of hydrogen: $\ce{Zn + NaOH -> Na2ZnO2 + H2}$ In this reaction, zinc reacts with ...
Adhway's user avatar
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5 votes
1 answer
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What is less coordinating to metals? Triflates or hexafluorophosphates, and why?

I saw a reaction where $\ce{AgOTf}$ and $\ce{AgPF6}$ were used, but I am trying to discern the reactivity between the two silver salts. I read that triflates and hexafluorophosphates are both non-...
MrAmateurChem's user avatar
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Help with titration reactions

I have a few questions regarding some basic reactions. Our lab did an experiment where we first standardized NaOH with oxalic acid and then HCl with standardized NaOH. We noticed that there was a ...
Resident cyrptid's user avatar
3 votes
1 answer
140 views

Hydrogen in Organometallic Chemistry

In the book, The Organic Chemistry of Nickel : Organonickel Complexes by PW Jolly, the reaction between sodium hexacarbonyldinickalte(-1) and ammonia produces hydride complex. Some possible ...
Shira's user avatar
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How to identify whether given element is meta(-ate) ion or meta(-ite) ion? [duplicate]

Like why $\ce{PbO3-}$ is a meta plumbate anion because definition of meta(-ate) ion is that it has maximum oxidation state of Pb by using minimum oxygens. But in this case how oxidation state of Pb is ...
Jennifer's user avatar
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Bicarbonate concentration in the RO permeate

I am facing a challenge since long ago, but have not been able to find a suitable solution for it. Please share your thoughts if you have the knowledge or experience in this area. I am running an RO ...
Mirwais 's user avatar
4 votes
1 answer
87 views

Brilliant fluorescent properties of Na2S(x) obtained from Na2SO3 or Na2S2O3

When $\ce{K2SO3}$ or $\ce{Na2SO3}$ is heated strongly by any method (in a flame, in an electric arc, on a metal plate in an induction heater), the resulting residue should be a mixture of $\ce{Na2SO4/...
Nikita Danilov's user avatar
3 votes
0 answers
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Short-circuiting an electrolytic cell with metal dendrites and observing interesting chaotic 1/f noise

While conducting home experiments on the electrolytic deposition of copper in a micro-gap (2-3 mm), under a microscope (x40) I observed interesting effects of short-circuiting by metal dendrites of ...
Nikita Danilov's user avatar
2 votes
0 answers
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Does copper(II) hydroxide dissolve in ammonia solution?

According to University of Oregon — Chemistry Interactive Demonstrations and Educational Resources — Copper-Ammonia Complex, the equilibrium constant for the formation of copper(II) hydroxide is ...
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1 answer
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What is the three-dimensional structure of H2CSF4?

Based on Bent’s rule and hybridization, which orbitals would be used to make the π-bond between carbon and sulfur, and in which plane would each of the atoms like? To make solving the question easier (...
gravity denier's user avatar
6 votes
1 answer
388 views

How is indium tin oxide a n-type semiconductor?

I was reading about indium tin oxide (ITO) and that it is considered a n-type semiconductor. However, that doesn’t make sense to me. If just one In(III) is replaced by Sn(IV) then we would have an ...
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3 votes
2 answers
367 views

Reaction of RuCl3 and alkaline solution

Well, it is different from first-row d-block elements, ruthenium, for instance, seems to be unstable in alkaline solution. I have been trying to find the experiment for the reaction between RuCl3 with ...
Shira's user avatar
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1 answer
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Do Electron-Withdrawing-Groups give an hypsochromic shift or a bathochromic one? and why?

I'm not familiar with this topic,but i know that bathochromic shifts occur when the energy gap between energy levels of the substituted molecule, are lower than the unsubstituted one;viceversa ...
BugsBunny's user avatar
4 votes
1 answer
95 views

Why is my Ni or Fe cathode blackening and pores getting blocked during alkaline (6 M KOH) electrolysis?

I am conducting an electrolysis process for hydrogen $(\ce{H2})$ and oxygen $(\ce{O2})$ generation using a $\pu{6 M}$ $\ce{KOH}$ alkaline solution. During the process, I have observed that my cathode ...
Bhavik Modi's user avatar
0 votes
0 answers
51 views

Mercury meniscus in plastic

Let's suppose you sample mercury in a polystyrene plastic test tube at 25 °C. Would it be expected that the meniscus of Hg is convex (upward curvature) ? I assume that the only possible adhesion ...
Tom's user avatar
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-1 votes
2 answers
224 views

What is the chemical reaction between nitric acid and acetic acid?

Is there a chemical reaction between nitric acid and acetic acid? The main reason I am asking this question because my lab throws away residues of both of these two ($\pu{1 M}$ concentration each) in ...
urxwrt's user avatar
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-2 votes
1 answer
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explanation for density order in group 2 elements

In Group 1 (alkali metals), density generally increases as you move down the group. However, in Group 2 (alkaline earth metals), the density might decrease initially and then increase. So when we ...
Light's user avatar
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2 votes
1 answer
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Blue colour while hexacyanoferrate(II) reacts with Hg2+

From this article, the author noticed that when [Fe(CN)6]4- reacts with Hg2+ in a 1:2 molar ratio, a white precipitate formed, then turn blue color. What is the chemical that is responsible for this ...
Shira's user avatar
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1 vote
0 answers
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Could the presence of Alkali Metals in recycled hydrated cement paste (HCP) affect the quality of the clinker?

"Electric recycling of Portland cement at scale" is an article that describes a new process for producing cement from recycled concrete and steel scrap. This process could significantly ...
Ronith's user avatar
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3 votes
1 answer
285 views

Fluorination of PCl5 in polar organic solvent

The species formed on fluorination of phosphorus pentachloride in a polar organic solve are While researching this question, I managed to find this in the book: N. N. Greenwood and A. Earnshaw, Book: ...
bromocresol's user avatar
3 votes
1 answer
562 views

Are there any 2D materials whose bonding can be best described as metallic rather than covalent?

Wikipedia's The nature of metallic bonding; In 2D says: Graphene is an example of two-dimensional metallic bonding. Its metallic bonds are similar to aromatic bonding in benzene, naphthalene, ...
uhoh's user avatar
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-1 votes
1 answer
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Would it be possible to form dense metal using a sol gel technique?

I was trying reduce some silver salt AgNO3 into elemental metal by thermal reduction I mixed it with citric acid and formed a solution and poured it into a circular cap (makeshift mould) and what I ...
assasinchop7's user avatar
-3 votes
1 answer
69 views

Standardizing alkaline ferricyanide solution [closed]

The ferricyanide method of determining reducing sugars is simple but I need clarity on time of addition of potassium iodide solution. I am unable to observe change in color from yellow to blue. I even ...
aj_23's user avatar
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-1 votes
3 answers
123 views

If LiF is ionic in nature, why can't it dissolve in water?

LiF is prominently ionic compound. I also know polar substances can be dissolved in water as "like dissolves like". Why is then LiF only weakly soluble, in comparison with LiCl, or LiBr, ...
Maths lover's user avatar
3 votes
0 answers
61 views

Is double excitation of nitrogen possible, and would it be able to use it as a central atom in a coordination complex?

I’m 17 and in my 2nd year of high-school (we have it a tad different here in the Czech Republic) and am interested in theoretical chemistry so that’s the explanation of the nature of my question. So, ...
Prokop Hoza's user avatar
0 votes
3 answers
96 views

Why there is no P−O−Cl bond in phosphoryl chloride?

Why is the structure of $\ce{POCl3}$ not like the left? I know the elements in period 3 or higher don’t have to follow the octet rule, but the left structure doesn’t seem to have any problems:
Kodori's user avatar
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Why exactly the stability of peroxides increase on going down the group [duplicate]

Why the stability of peroxides and superoxides increase down the group 1 and whereas the stability of oxides decrease down the group. The reason for one of them in my textbook is given as lattice ...
Kampann's user avatar
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0 answers
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Restriction of back bonding in tris(dimethylamino)borane

J.D. Lee Concise Inorganic Chemistry [3, p. 78] mentions that The bond length order of the B-N bond in the following compounds is $\ce{B(NR2)3}$ > $\ce{HB(NR2)2}$ > $\ce{H2B(NR2)}$ and the ...
Chetan's user avatar
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1 vote
0 answers
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Confusion in comparing contribution of resonance structures in Hydrazoic acid

Given below is the resonance hybrid of $\ce{HN3}$(Hydrazoic acid) And these are the resonance structures below: If the second resonance structure had contributed more, then the two bond lengths ...
Chetan's user avatar
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5 votes
0 answers
224 views

Which alloy forms the thinnest sulfide surface passivation layer?

Metal sulfides seem to often form thick layers on alloy surfaces exposed to molten $\ce{S}$. Are there alloy surfaces capable of passivation with $\ce{S}$ before the layer thickness reaches $\pu{1 nm}$...
Paul Kolk's user avatar
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0 answers
51 views

Melting Point Order of Benzene Derivatives

Q)Compare the melting points of the following? o-Hydroxybenzaldehyde o-Methoxybenzaldehyde p-Hydroxybenzaldehyde p-Methoxybenzaldehyde My attempt: Intermolecular H-bonding increases melting point ...
Chetan's user avatar
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0 votes
1 answer
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Ionic radii of the first row d-block elements

From these figures: I could not think of any explanation for the question why Cr2+ radius is larger than that of V2+ while the atomic radius of chromium is smaller than vanadium.
user avatar
-1 votes
1 answer
98 views

Percentage Yield

For the above MCQ question, I took the equation to be $$\ce{CaC2 + 2H2O -> C2H2 + Ca(OH)2}$$ I then calculated the moles of $\ce{CaC2}$ as 0.7273 moles, which has a 1:1 molar ratio to $\ce{C2H2}$, ...
Jane902's user avatar
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-1 votes
2 answers
54 views

What's the best way to recover silver from industrial and medical x-ray film? [closed]

I washed industrial and medical x-ray film with lye and tap water. Can I add bleach to draw the silver out of the lye or would I just add salt water to get AgCl, then siphon off the excess water and ...
Bryan's user avatar
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7 votes
0 answers
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Type of British porcelain invented around 1917-1918

Being subscribed already for 30 years on Scientific American, I recently downloaded the whole archive, and I am now going through 1914-1918. In the 26 January 1918 issue, on page 95, there is a small ...
chthon's user avatar
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0 answers
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How does a conc. electrolyte solution extract water from a organic phase like diethyl ether or ethyl acetate?

In organic chemistry, often, during the last steps of a workup we use concentrated brine solution (NaCl) to "extract" the water from the organic layer, especially when we have an organic ...
TheBorcanu's user avatar
8 votes
1 answer
1k views

Melting point of sulfur

The melting point (m.p.) of rhombic sulfur is 385.8 K while the m.p. for monoclinic sulfur is 392 K. Also, the transition temperature of rhombic to monoclinic sulfur is 369 K. Now, consider heating ...
KeShAw's user avatar
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0 votes
1 answer
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Determining an unknown E° from two similar half ox/redox reactions

Use the oxidation half-cell and reduction half-cell, $\ce{Cr^3+/Cr^2+} = \pu{0.424 V}$ and $\ce{Cr^3+/Cr2O7^2-} = \pu{1.32 V}$, to determine the $E^\circ$ for $\ce{Cr2O7^2-/Cr^2+}$: a. $\pu{-1.75 V}$ ...
Robertsson's user avatar

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